Question: Why Won’t My Water Heater Stay Lit?

Why won’t the flame stay lit on my water heater?

Thermocouple. If your gas water heater doesn’t stay lit, you may have a defective thermocouple. Most gas fired water heaters use a standing pilot to ignite the main burner. The thermocouple is a heat sensing probe that is part of the pilot assembly and sits just above the pilot flame.

Why does water heater keep turning off?

If your gas water heater keeps turning off, the problem most likely lies with the thermocouple. This vital component detects when the pilot light is lit and then allows gas to flow to the burner. A faulty thermocouple will shut off gas to the burner as well as the pilot.

What do you do if your pilot light won’t stay lit?

How to Light Your Furnace’s Pilot

  1. Make sure the thermostat is in heat mode.
  2. Locate the pilot valve.
  3. Always turn the valve knob to the off position and make sure to wait at least several minutes for any residual gas to clear away.
  4. Get your match ready.
  5. Once the pilot stays lit, turn the pilot valve to the on position.
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How much does it cost to replace a thermocouple on a water heater?

Thermocouple – $20 to $150 The thermocouple is an apparatus that senses whether the pilot light is lit and triggers the gas control valve. Repairs typically cost about $150 to have it done professionally, though a new thermocouple itself only costs about $20 on average.

How do you know if you have a bad thermocouple?

If you can’t get the flame to light at all, and you’re sure the gas is on, there’s probably an obstruction in the pilot tube. If the flame lights and goes out when you release the gas control knob after holding it in for the recommended 20 to 30 seconds, that’s the sign of a thermocouple malfunction.

Can I manually light my gas water heater?

Lighting the Pilot Light on a Manual Hot Water Heater If your hot water heater is a manual, grab a long lighter. Turn the pilot dial to the off position and wait 5-10 minutes for any gas to dissipate. Then, turn the pilot dial until it says the word pilot. After that, set your temperate knob to low.

Can you clean a thermocouple?

The best way to clean your thermocouple is to use either a piece of steel wool or the coarse side of a sponge to gently clean off any soot or other remnants. You can use a pencil eraser to clean between the threads of the screw that connects the thermocouple to the control valve of your system.

Can a water heater explode?

Water heater explosions are terrifying, and they can happen. Anything that causes excess pressure on your water heating system, such as a poor anode rod, or a lot of sediment buildup, can all cause your water heater to explode. A gas leak can also cause your water heater to explode because it is a tremendous fire risk.

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Can I fix a thermocouple?

If the pilot lights but the flame goes out as soon as you release the button after holding it for 60 seconds, then the thermocouple is bad. It’s possible to replace the thermocouple without removing the burner assembly, and many repair people do this.

What would cause a pilot light to keep going out?

Thermocouple Malfunction It is positioned very close to the flame, and when lit, the pilot light tells the thermocouple to keep the gas line open. A thermocouple that is dirty or malfunctioning will often shut off your gas supply in error, causing the pilot light to go out and your furnace to stop working.

How do you test a thermocouple?

Select the ohms or resistance option on your multimeter. Place one test lead on the side of the thermocouple and the other to the end that screws into the gas valve. If the thermocouple has proper continuity, a small resistance reading should be visible on the multimeter.

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