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Water Heater Repairs in Sacramento

Published on November 18, 2013

Defective Thermocouple Doesn’t Send Signal to Light Pilot

If you have a gas water heater and the pilot light doesn’t stay lit, the problem will probably be a device called a thermocouple. It is a temperature sensor that generates a signal to light the pilot. If yours has gone out, here are the steps you should take in order to replace it.

  1. First, look at how the present thermocouple is attached and make sure you’ll have enough room to work. You’ll want to turn off the water heater as well as the gas supply to be as safe as possible.
  2. You’ll probably need to take off the burner unit in order to be able to get to the thermocouple. You should see two doors at the base of the water heater. Inside you’ll find the pilot light, gas supply tubes and thermocouple connection. Take those off and then take out the old thermocouple.
  3. When you put the new device on, make sure that you don’t crimp or crack the soft metal. You need to make sure the new thermocouple is situated in a spot where half an inch of the tip will be heated by the pilot light.
  4. Put the burner unit components back into the water heater and make sure they are secured. Make sure you don’t over-tighten the screws, because you could cause some substantial damage.

Call Boyd Plumbing today if you would rather have one of our technicians replace your thermocouple.

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