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why did my water heater shut off

by Virgie Dare DVM Published 3 years ago Updated 2 years ago
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What Causes a Gas Water Heater to Turn Off All the Time?

  • Insufficient Gas Supply. Like your gas stove, a gas water heater relies on an adequate gas supply to maintain the burner’s operation.
  • Bad or Dirty Thermocouple. If your gas valve is open and there are no leaks, it would be wise to check the thermocouple. ...
  • Dirty Pilot Light or Tube. ...
  • Clogged or Dirty Air Inlet. ...

It's most commonly a thermostat or heating coil issue, which can be verified with an electrical tester. Another sign a water heater component is going bad is when the unit triggers a shut down every time hot water is called. If the breaker is tripping, an electrician can determine why the unit is shorting out.

Full Answer

Why would hot water heater suddenly stop working?

If an electric water heater is not producing hot water, it could be a simple problem like a blown fuse or tripped circuit breaker. Additionally, some electric water heaters have a circuit-style safety switch located near or on the thermostat.

What causes a water heater to go out?

A dirty thermocouple is the most common cause of malfunctioning water heater pilot light. Because the tip of the thermocouple is exposed to a direct flame, carbon can build up and cause the flame to malfunction or go out.

Can a water heater turn itself down?

If the heater isn't getting enough fuel, it could be due to a problematic gas valve or a leak, or dirty air inlets might be preventing oxygen from getting to the main burners, causing a shutdown.

How do you restart a water heater?

0:332:57Relight a Natural Gas Water Heater - YouTubeYouTubeStart of suggested clipEnd of suggested clipStart the procedure over at an arm's length turned the control knob slowly from pilot to on turn theMoreStart the procedure over at an arm's length turned the control knob slowly from pilot to on turn the hot water thermostat back to its original position.

What is the most common problem with water heaters?

Water leaks are perhaps the most common type of water heater issue you'll face. Any water heater will start to leak eventually, as by nature water will eventually corrode your tank and create microscopic cracks or fractures. However, this isn't always a sign that your tank is what's leaking.

How long do you hold the reset button on a hot water heater?

It depends on the size of the tank, but with any unit, you should be able to get in a hot shower with gas water heaters within 30-40 minutes and with electric tanks, about 60-90 minutes.

How long do water heaters last?

between eight and ten yearsHow Long Do Water Heaters Last. — The majority of water heaters last between eight and ten years. While ten is the age at which heater replacement is generally recommended, the actual need to replace a heater could arise before or after this timeline.

How do you know if your water heater is going out?

If you hear popping or rumbling noises coming from the water heater, it may be telling you that it's close to failure. These sounds become more noticeable as the unit gets older. They are a symptom of mineral formation and sediment buildup hardening inside the tank.

How long do hot water heaters last?

between eight and ten yearsHow Long Do Water Heaters Last. — The majority of water heaters last between eight and ten years. While ten is the age at which heater replacement is generally recommended, the actual need to replace a heater could arise before or after this timeline.

How do I know if the pilot light is out on my water heater?

The pilot light on most water heaters is located at the base of the unit, below the gas control valve. Open the access panel or door to the burner chamber and look inside. There, you'll find the pilot light tube, which should have a steady blue flame. If you don't see the flame, the pilot light is out.

Why does the pilot light keep going out?

A faulty, misaligned, dirty, or damaged thermocouple is often the culprit behind your pilot light going out. The thermocouple is an automatic safety shutoff device that prevents the gas valve from opening if the pilot light is out.

Why does my rheem water heater keep shutting off?

If your Rheem water heater continually shuts off, chances are the thermocouple is damaged, bent, or dirty. So, check the thermocouple, and in case...

Do all hot water heaters have A reset button?

Yes, all water heaters come with reset buttons; you just have to pat around the device to find it. It's usually a bright red color and is often pla...

Is it dangerous if the pilot light goes out on the water heater?

In many instances, this situation doesn't represent a significant risk. That's because contemporary gas water heaters come with valves that natural...

What is the average cost to repair A water heater that keeps shutting off?

The repair of water heaters that keep shutting off will cost you anywhere around $355 to $1750. Therefore, the average repair cost will be approxim...

What is the best investment for an office?

Tankless heaters are arguably one of the best investments you can make for your office or home.

How to avoid gas heater problems?

The perfect way to avoid this problem once and for all is by having your gas heater checked and maintained regularly.

What does a thermostat do on a water heater?

A thermostat manages both the lower and upper heating elements of your water heat er. As the water gets cold, it signals back to heating elements, causing water to reheat.

Why do you need to call a plumber to change the heating elements?

Call a plumber to change the heating elements and avoid doing it yourself, mainly because it may cause an electrical short circuit if it's placed incorrectly.

Why does my water heater make a buzzing sound?

If there's a cracking or a buzzing sound as you turn on the water heater, shut it off right away. This is primarily to prevent an explosion or a short circuit.

What happens when you loose wire?

When you have a loose wire, excessive heat is generated. Since the reset key can sense this excess heat, it trips automatically.

Why won't my water tank get warm?

If there's a heating element malfunction, chances are you won't get warm water. This is because if the heat source is down, the tank water will remain cold, even if everything else keeps operating.

Why does my water heater turn off?

Gas water heaters may turn off due to a problem with their pilot light, thermocouple or gas supply. 1. Pilot Light Burner. When a gas water heater’s pilot light goes out, it’ll shut down. You can check to see if your pilot light is still lit by opening up its compartment. If it has gone out, the most likely culprit is simply dirt ...

What temperature should water be when shutting off?

Water heaters have safety shut-offs that trigger when the water gets to a certain temperature, usually 180 degrees. Turn down the temperature a bit (if you set it higher recently) and see if that fixes the problem.

Does Fremont have a water heater repair?

We offer water heater repair in Fremont for both tankless and electric water heaters. Call now for service.

Can you relight a pilot light?

Don’t re-light the pilot light, as the problem will just happen again. Call your plumber to have them clean out the dust and debris.

Why won't my pilot light stay on?

If the thermocouple in your water heater malfunctions in some way , the pilot light simply won't stay on. We recommend again that you hire a qualified plumber to diagnose and repair any problems you may have with your water heater.

Why does my water heater keep shutting off?

There are eight possible reasons why your gas water heater may be shutting off. A dirty or clogged air inlet screen. A faulty thermopile.

What does it mean when a gas water heater doesn't let in air?

If this screen gets clogged up it can't function as it's supposed to. Which means that it won't let in enough air which is needed to keep the gas burners on.

What happens if my water heater is leaking?

In some cases the leak may only occur when the tank is heating. As water is heated, the water volume expands and puts pressure on the seams of the tank. If you think or know that your water heater is leaking, call in experienced plumbers to fix the problem immediately.

What is the valve in a water heater?

The gas valve in your hot water heater is the device that distributes gas to the water heater unit.

What causes a hot water tank to overheat?

A blocked vent in your hot water tank can cause the burner chamber to overheat. This then results in burning out the thermoresistor.

Where is the thermopile on a water heater?

The thermopile component of your water heater is most often a metal rod located next to the pilot burner. It's purpose is to trigger the gas controls to turn on.

What happens if my gas water heater reset button keeps tripping?

Gas Water Heater Specifics. If your gas water heater reset button keeps tripping, you will need to address it differently. Gas water heaters also take in cold water, which is heated with gas burners at the bottom. The water heats, rises and exits through a hot water discharge pipe.

What happens if the water heater is not working?

If the water in the tank is more than 180 degrees, the reset button will shut off the power. These tanks have two thermostats and two heating elements, and if one of the thermostats is not working, one of the elements may keep heating the water, and the thermostat may need to be replaced. On the other hand, a bad heating element could be ...

Why does my water heater turn off?

From faulty thermostats and damaged heating elements to water temperatures that are too hot, there are a number of reasons your hot water heater might turn off.

What temperature should a water heater thermostat be?

Gas water heaters work differently. Most manufacturers recommend setting water heater thermostats to 120 degrees Fahrenheit for safety reasons, explains First American Home Warranty.

Why is my water heater not getting enough gas?

If the heater isn’t getting enough fuel, it could be due to a problematic gas valve or a leak, or dirty air inlets might be preventing oxygen from getting to the main burners, causing a shutdown. The best move is to contact a plumber. To prevent these issues from happening, regular gas water heater maintenance is recommended.

How does cold water enter a water heater?

Cold water enters the electric water heater tanks via the dip tube. Once inside the tank, the heating element warms the water, and it rises up the tank. Then, it leaves the tank through the heat-out pipe and travels to where it is needed. Despite this simple process, problems do occur from time to time.

What is the regulator on a gas tank?

A gas regulator assembly on the outside of the tank controls the burner that heats up the water. There is also an exhaust flue designed for exhaust gas to flow up and out through a vent pipe or chimney. That assembly also has a pilot light, and the flames are supposed to be about half an inch high with blue tips.

How to activate circulator on tankless water heater?

The second person just needs to activate the circulator’s timer by pushing a remote button or switch near the hot tap a few minutes before turning on the shower. That minute or two after pushing the button or switch allows enough time for the residual warm water from the first shower and the cold water to push through the pipe back to the water heater before the newly demanded hot water arrives to the shower.

What to do when a tankless water heater is shutting off?

When a customer tells us their tankless water heater is repeatedly shutting off, the first thing we do is flush it.

How long does a tankless water heater last?

When properly maintained, a tankless water heater should last about 20 years (according to National Labs). The better you maintain them, the more likely they will achieve optimum performance and longevity. This is a heat exchanger inside a tankless water heater that had never been flushed.

Why flush a tankless water heater?

Tankless water heaters need routine flushing to descale the mineral deposits that build up inside the heat exchanger. Descaling is the critical part of routine maintenance. Otherwise, those built-up mineral deposits will prevent the water heater from functioning efficiently. Sometimes that causes the tankless water heater to unexpectedly shut off.

How does a circulator work?

The circulator system works by pushing hot water from the water heater out through pipes to each hot water fixture and circulate back to the water heater. But it needs a path back to the water heater to re-circulate the hot water. (You can read additional information on hot water circulation systems here.)

Why is tankless energy important?

Also, the main benefit of tankless is to save energy so it would defeat the purpose to have it run continuously. (Most newer tankless systems will issue an error code if it continuously runs an hour or more.)

How to use cold water return?

To do that, we attach a thermostat and valve to the cold water pipe on the furthest fixture ( usually a bathroom under the sink) from the water heater to serve as the starting point for the return loop, ending at the cold water inlet to the water heater. And we also need to install buttons or switches at each hot water outlet to remotely start the timer to turn on the circulator pump.

Why is my water heater taking so long to heat?

Water takes too long to heat. Possible reasons for water taking a long time to heat include faulty heating elements, sediment build-up on the elements and a faulty thermostat. Check each of these in turn and replace as necessary.

Why is my water heater tank not big enough?

If your tank is too small for the number of people showering , for example, you may use up all the hot water before everyone is finished.

Why does my water heater stop heating?

If your heater produced enough hot water for everyone before but suddenly stopped or no longer heats the water enough, the problem is probably due to a heating element failing. Check them and replace as necessary.

Why does my water smell bad?

If your water smells bad, bacteria in your heater could be the culprit. This is especially common if your water comes from a well. Flushing your tank can help, or you can try boiling the water to maximum temperature to kill all the bacteria. If this doesn’t work, try cleaning it out with chlorine bleach.

Why does my thermocouple light but then go out?

If it lights but then goes out, the causes could be similar. The thermocouple could need replacing, you could have a bad gas valve, or the vent could have become blocked.

Why is my electric heater not working?

The most obvious reason an electric heater doesn’t work is that it’s not receiving any power. Start by checking the circuit breaker to see if it has been tripped. If it has, it’s an easy fix – simply turn it off and turn it back on again. You may also have to replace the fuse if it has blown.

Why is my water tank turning rusty?

If your water starts to turn to a dirty rust color, you are probably looking at corrosion inside your tank. The only solution for this is replacing the tank. However, it could also be due to a failing anode rod, so before replacing the tank, flush the tank and replace the anode rod to see if this fixes the problem. 8.

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