How To Fix A Hot Water Heater
Problems with no hot water? Quickly diagnose and repair your water heater problem with this comprehensive troubleshooting guide. Videos, drawings, and like shooting fish in a barrel to empathise stride-by-step DIY advice testify you how to fix your water heater.
This article will show y'all how to troubleshoot and set both gas and electric storage h2o heater problems. If y'all have a tankless water heater that is not working, please see Tankless H2o Heater Repairs.
To leap to the exact advice you need, select your specific problem:
• No Hot Water Anywhere In the House
• Hot Water Non Working In Part of The House
• No Hot Water In An Apartment
• H2o Is Not Hot Enough
• Not Enough Hot Water Supply
• No Hot Water In The Morning
• Hot Water Has Low Force per unit area or No Pressure level
• Hot Water Is Too Hot
How to Tell If Your Water Heater Is Gas or Electric
For many water heater repairs, it makes a difference whether the water heater is gas or electric.
These links will take you downwardly the page to HomeTips advice for each type:
Gas Water Heater Troubleshooting and Repairs
Electric Water Heater Troubleshooting and Repairs
The two types heat h2o differently.
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Here is communication for homeowners who aren't certain which type of water heater they have.
To quickly tell the difference, look for a flue. A combustion apparatus that burns fuel such every bit gas must vent the exhaust fumes to the outdoors through a flue (a round chimney piping). A flue indicates that the water heater burns gas or some other combustion fuel, such as propane.
In addition, a gas water heater has a gas pipe going to it, a airplane pilot light, and a burner at the bottom of the hot h2o tank. The burner is typically behind a small metal access panel or viewing door. If y'all look past the admission console or viewing door, you should see a flame unless the pilot calorie-free is out.
An electric water heater doesn't produce combustion gasses, so it doesn't accept a flue at the height. It does, however, take an electrical cablevision or conduit that connects it to an electrical panel. It has one or 2 thermostats on the side of the tank.
Water Heater Diagrams
No Hot Water Anywhere In the House
No hot water throughout the house is by far the most common water heater complaint. This usually indicates that the h2o heater's gas burner or electric heating elements are non producing rut.
To be sure your entire house is without hot h2o, cheque every hot water faucet and fixture. If you find one or more fixtures have hot water, skip to Hot H2o Not Working In Part of The House.
As well check other gas appliances in the house—such as a gas range or furnace—to see whether they work. If they don't, your home's gas supply has been interrupted—telephone call the gas company.
Adjacent, impact the water heater's temperature-pressure (TP) relief valve and the hot water outlet pipage above the water heater (see water heater diagrams above).
If you lot feel warmth, your water heater is probably working. The hot water may be getting blocked somewhere in the pipes between the water heater and the fixtures. Of form, the TP valve or pipe could still be warm if the water heater stopped working within the last three or 4 hours because the water within would still exist property some estrus.
If the TP valve or outlet pipe is cold, the water heater hasn't been working for several hours. If this is the instance and hot water is non available at any fixture, do the following.
Because methods for repairing the problem may depend on whether your water heater is gas or electric, these are discussed separately beneath.
Nosotros'll discuss gas water heaters first. if your water heater is electric, jump downwards the folio to No Hot Water—Electric Water Heater for DIY fixes.
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No Hot H2o — Gas Water Heater
If a gas water heater isn't heating, a common trouble is usually that the pilot light has gone out. This may exist caused by the gas valve, the natural gas supply, or—more than likely—the thermocouple located adjacent to the airplane pilot light.
The following training video for h2o heater service people is fantabulous for gas water heater troubleshooting. Skip forward to the 11:fifteen mark in the video if you desire to spring to dealing with no hot water.
Gas Water Heater Troubleshooting Video
Hither is the procedure:
First, await inside the inspection window at the bottom of the water heater tank for a small flame: the pilot light. In some cases, this may look like a small LED calorie-free. In fact, it may be so pocket-sized that you'll demand to dim the room lights to see it.
If the pilot lite is out, follow the instructions posted on the water heater or the details beneath hither to relight the pilot light.
The first matter to check on a propane h2o heater is the gas level in the propane tank outside. If it's low, take it refilled.
In the following video, you tin can meet that the most frequent cause of no hot water in a gas h2o heater is that the airplane pilot low-cal has gone out. This can happen if the natural gas supply is interrupted, the gas valve is turned off, or a gust of wind blows out the airplane pilot lite.
This video guides you through the process of relighting a typical h2o heater'southward pilot lite. The skilful thing nearly this video is that the service person is working on an actual h2o heater rather than a disassembled model like the ane in the video above. For more about this, read on.
How to Relight a Gas H2o Heater Pilot Low-cal
The problem is oftentimes that the airplane pilot low-cal has gone out. This can be caused by the gas supply being interrupted, the gas valve beingness turned off, or a gust of wind blowing out the pilot flame. Look for a very small flame—the airplane pilot light—through the viewing window at the lesser of the water heater. If you lot don't see a pilot lite, try relighting the pilot. Instructions are almost always posted on the water heater, but these generic directions work for most water heaters:
- one. Turn off the water heater's gas close-off valve.
- ii. Look v minutes for gas to clear from the h2o heater.
- 3. Open up the access cover to the airplane pilot light (under the gas valve).
- 4. Turn the gas valve to "Pilot."
- 5. Button downward the knob (or a separate pilot push) to first the flow of gas to the pilot. Keep property information technology down.
- 6. Use a long lighter to attain into the admission and light the airplane pilot. Keep holding the push button down.
- vii. After holding downwards the knob or button for nigh 1 minute, slowly release it. Make certain the pilot flame stays lit.
- eight. Plow the water heater's gas valve to "On." When you do this, you lot may hear the burner ignite.
- 9. Secure the admission encompass back in place.
To relight the airplane pilot light of a water heater similar the one shown in the above video:
- Hold downwards the pilot switch and click the ignitor button repeatedly. A tiny spark should ignite the pilot when you click the ignitor.
- When the pilot ignites, continue property downward the airplane pilot switch for i minute. During this minute, the pilot flame heats the thermocouple or thermopile. This device, when heated, provides the tiny corporeality of electricity needed to operate the water heater gas valve.
- Afterward one minute, slowly release the airplane pilot switch and brand sure the pilot light stays lit. If information technology doesn't stay lit, echo the procedure.
If the H2o Heater Airplane pilot Calorie-free Won't Light
If yous the pilot flame won't light when you click the ignitor, look to verify that a tiny spark is happening by the airplane pilot. If necessary, dim the room lights. If at that place is a spark, gas isn't reaching the pilot. The crusade may be:
• Air in the gas line. If the water heater was newly installed, the gas line is probably full of air. Y'all'll demand to purge this air from the line by holding downwardly the pilot knob longer.
• The gas valve on the gas supply pipe may exist turned off. Be sure it is open. The valve handle should be parallel to the pipe.
• The thermocouple may exist defective. See more How to Supersede a Water Heater Thermocouple beneath. Call a water heater repair person if you don't have the tools or skills to handle this.
• Low gas pressure or a malfunctioning gas control valve could also crusade a pilot lite to get out repeatedly. Call your gas visitor or a water heater repair person if you suspect this is the example.
If the Airplane pilot Flame Keeps Going Out
If the pilot flame lights but keeps going out, its orifice could be muddy and clogged, making the flame minor and unsustainable. Check to make certain there is no obvious clay and debris bottleneck it.
If the pilot light goes out after y'all calorie-free it, click the loftier-limit reset switch (sometimes called a door switch), located down by the viewing door at the bottom of the water tank. Delight refer to the video at the top of this article and advance to the xviii:30 point in it to see a detail of how to reset this switch. Just push the push of this switch and listen for a click.
Then try relighting the pilot again.
If information technology still doesn't stay lit, the problem is well-nigh ever a defective thermocouple. This is an cheap part—about $twenty. Professional installation, which we recommend unless you are an experienced do-it-yourselfer, should price well-nigh $150, office included. Instructions for replacing it are in the video below.
Video: How to Supercede a Water Heater Thermocouple
A malfunctioning thermocouple is a frequent cause of gas water heater problems. The pilot calorie-free may not stay lit if the thermocouple is faulty. If you are handy, you tin can accommodate, clean, or replace this function yourself.
The post-obit video shows how to diagnose and ready or supercede a thermocouple.
Be sure to turn off the gas supply valve before working on these parts.
When y'all're finished, turn the gas back on, relight the airplane pilot flame as discussed above, and see if the burner works properly.
This video does a specially proficient chore of detailing how to remove the thermocouple and burner assembly, and how to replace it.
One time the burner and thermocouple assembly are reinstalled and the gas supply valve is turned on, relight the pilot flame as discussed in a higher place.
Water Heater Burner Troubleshooting
If the pilot stays lit, as it should when working properly, plow the gas valve to ON. The burner should ignite.
If the burner ignites, turn the thermostat dorsum to an appropriate estrus setting. Your hot h2o heater should work at present.
If the burner does not keep, prepare the thermostat at near 120 degrees F. and turn on a hot water faucet. Await a few minutes to see if the water heater burner ignites. If it doesn't ignite, get out the hot water running and try lowering so raising the temperature setting on the dial until the burner ignites.
If the burner still doesn't ignite, plow off the hot h2o and read on. The water heater's gas valve and thermostat may be lacking.
Gas leaks. If you smell gas most it—the odour of rotten eggs or a garlic-similar scent—plough the gas valve command to OFF (you may accept to button down to turn information technology). That is the smell of natural gas. Wait until the gas aroma has dissipated before relighting the pilot light.
If the gas smell is potent and doesn't misemploy, immediately turn off the gas supply valve, ventilate the space, and phone call a plumber or your gas utility visitor from a remote location.
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Water Heater Gas Valve Troubleshooting
Two main types of water heater gas valves are usually used on storage water heaters: mechanical and electronic. These two valves are thoroughly discussed in the following video and the video at the top of this commodity.
If you're a service professional person or an avid do-it-yourselfer, and you want to understand the differences between classic mechanical gas valves and a newer electronic gas valve, watch the video hither. Information technology as well discusses how to diagnose and handle problems.
Mechanical gas valve. Repair people speak highly of classic mechanical-style gas valves because they have served tried and true for decades. You can replace a simple role such equally the thermocouple without replacing a major component.
Electronic gas valve. Many newer water heaters use a new electronic control valve called the Honeywell Smart Controller. Helpful for diagnostics, it has blinking lights that inform you or the service person about the h2o heater's status.
As y'all might expect, this controller is more expensive than a mechanical gas valve, every bit are its replacement parts. Replacement of this may cost $300 to $400, installed.
No Hot Water — Electrical Water Heater
When an electric water heater doesn't heat water, either the power to the h2o heater has been interrupted or the controls or heating elements are not working.
Ever close off the power to an electric h2o heater before working on information technology. And never work on it if water is pooled on the floor near the apparatus. Shut off the circuit to the water heater at the excursion break box and telephone call a qualified h2o heater repair person.
Perform these diagnostics:
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1 Be sure electricity is being delivered to the apparatus. Check the main switch on the water heater and the circuit breaker (or fuse) that serves the water heater.
If the excursion billow has tripped, reset the circuit breaker by flipping information technology all the way to OFF and then back to ON.
If a fuse has blown, supercede it with a new fuse with the same rating. If the circuit breaker or fuse repeatedly blows out, call a qualified electrician to check and repair the circuit. Note that the water heater should not share a circuit with another appliance—it draws too much power when heating.
2 Check the high-temperature cutoff on the water heater. Open up the panel and wait for a reset push. Push it. If the button doesn't make a clicking sound or you still don't take ability afterward pressing information technology, and then your loftier-temperature cutoff switch is probably bad. Telephone call an electric water heater repair person.
3 If there is any water within the compartment, this could cause the thermostat to malfunction. Leaking water means that your water heater may need to be replaced. See Water Heater Is Leaking.
If these steps don't solve the problem, one or both heating elements may exist the problem. You can replace these yourself post-obit the manufacturer'south instructions, or telephone call a water heater service professional. See the post-obit video for additional help.
Videos: No Hot H2o—Electric Water Heater
Here are two helpful videos that show how to troubleshoot an electric water heater that has no hot water.
In well-nigh cases, if the h2o heater isn't heating water, the electric elements inside it are not getting hot. This may exist happening considering the circuit breaker that controls the water heater has flipped off, the lower or upper thermostat stopped working, or electrical elements are defective.
To run into more than about troubleshooting and repairing your electric water heater, refer to this video:
If you find that a heating element needs replacement, check out the informative video below by Dan Jiles. Pay attention to the fact that, even afterward the circuit breaker was shut off, the power to the h2o heater was still on. WOOPS! This video shows you how to avoid this potentially shocking—if not deadly—mistake!
A particularly helpful attribute of this video is that Mr. Jiles shows you how to remove the heating element when the tank is still full of water. This saves you from needing to drain the entire h2o heater. Exist sure to turn off the power first! Also turn off the water to the water heater and release pressure by lifting the lever on the TP valve as he shows.
Annotation: Unless the water heater stopped working more than a few hours ago, the water spilling out will be hot.
Tools and supplies y'all'll need:
• Inexpensive water heater element wrench
• Replacement h2o heater chemical element
• Phillips screwdriver
• Voltage testing meter
• Towel
Electric Water Heater Troubleshooting
This video does a good job of illustrating how to brand sure electrical electric current is flowing to the electric water heater. Similar to the video directly higher up, it as well shows how to test the thermostat and elements, merely it does a particularly skillful job of showing details such as the verbal screws and terminals to test with a multimeter and how to use the multimeter.
Hot Water Not Working In Part of The Business firm
Unless you lot have two or more than h2o heaters, hot water in some function of your house means that the water heater is working. But something is keeping the hot water from traveling to the faucets or fixtures that don't work. A typical example of this would be that the kitchen faucet produces hot water merely you can't become a hot shower.
Mutual reasons are:
• A cross connection. If yous're getting full force per unit area on the hot water side of your faucets but no hot h2o, and then the problem probably isn't a valve or a blockage. In that case, at that place may be a cross connectedness in the plumbing.
A cross connection can occur in a failing shower valve (or any mixing valve) that allows cold water to pass to the hot side, letting common cold water into the hot water piping. Or it can happen if a plumber makes a mistake when installing pipes.
• A airtight valve. If there is a valve on the hot water pipe that exits the tank and goes to the non-working fixtures, exist certain it's all the way open.
• Mineral deposits in the pipes. If old steel water pipes have never been replaced, they may be filled with deposits that restrict water period. Or chunks of mineral deposits may accept broken loose from pipes or the interior of the water heater and traveled through the pipes to a place where they lodge (such equally at an elbow), blocking h2o catamenia.
• Water ice, if the pipes have frozen recently. Frozen pipes can restrict flow to part of the house. See How to Repair Frozen Water Pipes. Of course, if the conditions isn't freezing, this isn't the problem.
• Distance. If the water heater is far from the fixtures that aren't getting hot h2o, the pipes from the water heater may go through an unheated space such as a basement or attic where they give off their estrus. Once the pipes warm upward, this shouldn't be a problem.
Answers to this upshot are turning up the heat dial on the h2o heater, insulating the hot water pipes, moving the water heater, installing a 2nd water heater or adding a recirculating pump organisation. Foam pipage insulation minimizes estrus loss through hot-water pipes. If you can gain access to your hot-water pipes, from the basement, for example, put cream water pipe insulation sleeves onto them.
• A water recirculating pump organisation. If y'all have one of these, a defective cheque valve could allow cold water into the hot h2o piping.
No Hot Water In An Apartment
1 of the downsides of apartment living is that yous're non necessarily in control of your own water heater. In addition, your neighbors' usage can affect your supply of hot water if you lot share a water heater.
Your first step should be to contact your landlord and alarm them to the problem. Fifty-fifty though it may not be specified past your lease, your landlord is responsible for providing a healthy, safe infinite. Hot h2o is considered essential to healthy living. Documenting your complaint in writing is a practiced idea.
Someone will need to find out whether or not your unit is the only one with hot water problems. If it is the only one, a plumber should be dispatched to check your plumbing. If non, building-wide pipes and water heaters will need to exist stock-still.
The issues that may exist restricting your hot h2o are all the aforementioned as those discussed above. With that in mind, the repairs volition be the same.
If you're lucky, the solution will be relighting the pilot flame as discussed above for gas water heating or resetting a circuit breaker for electrical water heating.
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H2o Is Non Hot Enough
Before you do anything else, adjust the temperature command on the water heater toward hot. On a gas water heater, his is the punch on the gas control. On an electrical water heater, it is the thermostat controls for the elements.
Wait a piffling while, and so cheque the water temperature at a faucet. Don't overdo this—the water shouldn't be scalding hot.
If raising the rut doesn't exercise the job, the dip tube that supplies cold water to the tank may exist cleaved or cracked. (You lot can run across this in the illustration to a higher place.)
This plastic tube is supposed to direct cold water to the bottom of the water heater tank. All the same, if this tube breaks or splits (which is a common problem over fourth dimension), common cold water pours in at the top of the tank and mixes with the hot water that is on its way to the hot water pipes. The issue is lukewarm h2o.
Either have the dip tube replaced by a water heater repair pro (HomeAdvisor), or, if the water heater is out of warranty and appears to take reached the end of its lifespan, consider replacing it—a new water heater is likely to operate more efficiently. Yous can see more well-nigh how to replace the dip tube in the Ron Hazelton video below.
Non Enough Hot Water Supply
Another common water heater problem is that the water heater doesn't produce enough hot h2o. In other words, the problem is with the amount of hot water available.
You can endeavour raising the temperature on the water heater, equally discussed directly above. If adjusting the temperature doesn't practice the fob, try the water heater troubleshooting methods below.
Never Enough Hot Water
If it seems like yous never accept enough hot h2o in your domicile, your water heater may exist too small. If you never have enough hot water or your needs for hot water accept increased because of a big new soaking tub or loftier-menstruation shower head, you'll probably demand to get a new, larger water heater. Meet our H2o Heater Ownership Guide.
Exist certain to look into tankless water heaters considering, with this blazon, you never run out of hot water.
Non Enough Hot Water Recently
If your water heater supplies less hot water recently (you've had enough hot h2o in the contempo past but not now), first check the dial on the water heater, equally discussed above. And then go on with the following water heater troubleshooting advice.
Mutual reasons are:
• Cold conditions. In cold weather, your h2o heater must piece of work harder to heat-up the cold h2o coming from the water supply. In add-on, the water cools more as it travels through pipes that run through unheated spaces. Adjust the h2o heater to a slightly hotter temperature to make upwardly for the cold.
• A leaking h2o heater. You'd probably know if information technology'south leaking but, just in instance, check around its base for signs of water. If it is leaking, run into Water Heater Is Leaking. Practise this correct away to preclude h2o damage.
• Sediment buildup. Over time, mineral deposits collect at the bottom of the water heater. These somewhen build upward. When they do, they diminish the transfer of heat to the h2o.
This cuts down on the h2o heater's efficiency and its ability to adequately heat the water.
The reply is to flush the water heater tank, which removes deposits. Run into How to Flush or Bleed A Water Heater.
No Hot Water In The Morning
A water heater's thermostat is actually a temperature probe—a metal rod—that expands and contracts with changes in the water temperature inside the water heater. It is less precise than a furnace or air conditioning thermostat, so temperature swings of upwardly to thirty degrees or more are normal.
Keep in mind that the h2o sitting in the pipes is cold, particularly in the forenoon. When y'all turn on the first shower, that cold water moves to the water heater. But the water heater's burner hasn't had time to warm it. So it mixes with the warm h2o in the tank and travels to the shower caput equally lukewarm water.
You can try turning up the temperature adjustment valve a little, simply be conscientious not to make the water scalding hot!
Hot H2o Has Low Pressure or No Force per unit area
First, determine whether the problem is with just the hot h2o or if it is with both hot and cold water.
Low Hot and Cold H2o Pressure
If both cold and hot water pressure are low, this depression h2o pressure is caused past:
• A partially closed shutoff valve. Inbound h2o passes through at least 1 shutoff valve before it reaches your house. The commencement one is out past the meter.
See How to Plough Off the Water to a Fixture or the House for locations of diverse valves. Be certain valves are all the style open by turning them fully counterclockwise. Check all valves.
• Low pressure being delivered by the water company. Telephone call the water department and ask what the water pressure should exist at your abode.
You tin can buy an cheap water pressure gauge online or at a home centre. Screw this onto an outside hose faucet, and open the faucet fully.
Expert pressure is between 45 and 55 psi. If your pressure is below twoscore psi, information technology is low. Investigate having a plumber install a water pressure booster. But don't overdo it: Pressure above 80 psi will crusade excessive vesture on plumbing.
• Physical restriction in the pipes. Either some of the pipes may exist too small or, if they are galvanized steel pipes, they may be clogged with mineral deposits. Replacing pipes is the merely answer for this. Call a plumber.
For more, please see How to Solve H2o Pressure Bug.
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Only Low Hot Water Pressure
Follow the same advice as directly to a higher place, but consider that you've narrowed downwards the trouble to hot water force per unit area only. This ways that the cause is somewhere between the water heater and the fixtures.
Nigh likely, the culprit is a partially airtight valve, a constriction such as old steel pipes clogged with deposits or too-minor pipes, or a chunk of deposits has broken loose from the water heater and jammed in a hot water pipe.
The next step in diagnosing a low hot water pressure problem is to ascertain where the problem exists. Is it in 1 surface area of the house, at the shower in i bath, or at the kitchen sink?
Low Hot Water Pressure In Whole House or Several Fixtures
If you have low hot water pressure throughout the firm or in an entire surface area (such as a bathroom), make sure there are no partially-airtight valves on the hot water pipes that serve them.
If the pressure driblet was sudden, it could exist caused by a leak somewhere in the system. If you don't find whatsoever signs of a leak, figure that the cause is likely a chunk of deposits has lodged in the pipe somewhere.
If the problem is chronic, re-piping is probably going to be necessary to solve it.
Either way, telephone call a plumber.
Low Hot Water Pressure from a Shower Head
Low hot water pressure from a shower head is often caused past limescale mineral deposits clogging the shower head.
Here is how to dissolve mineral deposits in a shower head:
- Fill a resealable plastic bag with equal parts white vinegar and hot water.
- Fit this bag over the shower head then the head is fully submerged, and secure it with rubber bands or a twist tie.
- Let the solution to dissolve the deposits for several hours.
- Remove the bag, and plow on the shower to rinse the shower head and wash away deposits.
If that doesn't work, run across How to Supplant a Shower Head for instructions on how to remove it. Look for a little plastic disc—a flow restrictor. Remove this disc, reassemble the head, and try the shower again.
Depression Hot Water Pressure from a Faucet
First expect to see whether the faucet has an aerator screwed onto the end of the spout. If it does, unscrew the aerator and rinse out its screen, holding information technology upside down under a strong stream of water. If y'all need pliers to break loose its connection with the spout, wrap the aerator with duct record start so you don't scar the finish with the pliers.
If the faucet spout shows signs of limescale mineral deposits, dissolve them as discussed above for shower heads.
Some other cause of pressure loss in a faucet is misalignment of its interior workings. Please see How to Set up a Leaking Faucet for disassembly and repair information.
Low Hot H2o Force per unit area In a Washing Auto
Plough off the hot water supply valve. Then remove the hot h2o supply hose from the back of the washing machine.
Check the hose and/or the water inlet valve that the hose screws onto for a small screen that's meant to catch any debris in the water supply. Using a small screwdriver, carefully pry out the screen. Thoroughly rinse the screen and reinstall it.
Hot Water Is Too Hot
Conspicuously, the first thing to do if your hot water is as well hot is turn down the water heater's temperature control. Note the present setting (or mark it with a felt-tip pen), and so plough it toward a cooler setting, look a couple of hours, and see if the problem is solved. If it isn't, keep with the post-obit water heater troubleshooting communication:
If steam or excessively hot water shoots out of faucets, or y'all hear humid sounds within the water heater, the appliance may not be shutting off at its set up temperature. This condition can be dangerous, both because hot water and steam can scald people, and because the water heater could rupture from backlog pressure level. Note: The sound of water boiling is not the same every bit a rumbling sound almost the base of operations of the water heater caused by mineral sediment being churned by heat.
A high-temperature limit switch down by the viewing door at the bottom of the tank should protect the water heater from overheating. Run across the video at the top of this article and motility to the xviii:30 marking in the video to learn how to reset this switch. Push the button of this switch and listen for a click. If it doesn't work, it will need to be replaced.
The task of the temperature-pressure (TP) relief valve is to release excessive pressure level from steam buildup, but the TP valve may have been improperly installed, or information technology may be faulty.
Cheque the TP valve. Lift or lower the lever on this valve. Water should bleed from the overflow pipe.
If the valve is non working, plow down the water heater'southward temperature and allow the h2o to absurd, and so replace the h2o heater'due south pressure relief valve.
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How To Fix A Hot Water Heater,
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