Question: How Much Is A Thermocouple For A Water Heater?

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.

How long does a thermocouple last on a water heater?

All things considered, the question remains, “How long should my thermocouple last?” The answer to that question is that it depends on the application. In an ideal environment, that length of time can be indefinite.

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How do you replace a thermocouple on a water heater?

How to Replace a Water Heater’s Thermocouple

  1. Turn off the gas supply.
  2. Unfasten the three nuts that hold the thermocouple and the two gas tubes to the valve.
  3. Detach the thermocouple from the burner.
  4. Install the new one the same way that you removed the old one.

Can I replace a thermocouple myself?

It’s easy to replace and a new one costs $5 to $10. Rather than trying to unfasten the thermocouple inside the water heater’s burning chamber, it’s easier to remove the whole burner and thermocouple assembly. Then unfasten the three nuts that hold the thermocouple and the two gas tubes to the valve.

Why does pilot not stay lit on water heater?

Lack of Combustible Air. Another reason your gas water heater pilot light won’t stay lit could be due to not having enough combustible air. Your water heater requires air to keep the pilot light burning. Otherwise, the flame goes out.

Will a pilot stay lit with a bad thermocouple?

What is a Thermocouple? A thermocouple senses the heat of the pilot and allows gas to flow to the burner. A bad thermocouple will shut off gas to both the pilot and the burner so the pilot light won’t stay lit.

What causes a thermocouple to fail?

Changes in temperature can cause regular expansion and contraction in metal, which will cause thermocouples to weaken over time. After enough time, metal fatigue can cause a thermocouple to break. If thermocouples start to give out unusual readings, it may be suffering from metal fatigue.

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How many years does a thermocouple last?

Thermocouples are rigorously tested and should last for years. Indeed, experts believe a four-year check cycle is all that is needed to make sure things are functioning properly.

Can a thermocouple be cleaned?

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.

What is the life of a thermocouple?

Thermocouple life expectancy varies greatly from just a few hours to many years. Many factors in- cluding calibration type, environ- ment, temperature, sensor design, and thermal cycling will determine life expectancy.

Can you 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.

Can you bypass a thermocouple on a water heater?

Realistically, you have just disabled the thermocouple, but you can also reach in and unclip it from its holding bracket where it meets the pilot light. In most cases it will be held on with a gravity clip, but some are held on with a screw that must be removed with a small screwdriver.

Can you clean a thermocouple on a water heater?

Cleaning the thermocouple You can use Emery cloth sandpaper to gently clean any debris or build-up from the end of the thermocouple. If present, you should also clean off any corrosion where the power wire connects to the thermocouple terminal.

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