Problem: Furnace or water heater pilot will not stay lit.
Solution: On the older furnaces older than 15 years old many of the furnaces and many water heaters today have a thermocouple which senses the flame of the pilot and tells the gas valve it is OK to open. The thermocouple is a safety device because if it does not sense a pilot flame it will not allow the gas valve to open. Thank Goodness!!! We sell a Honeywell Universal pilot on the following page: https://www.arnoldservice.com/honeywell-universal-36-universal-thermocouple-12/ Sometimes the gas valve can be the reason why the pilot is not staying lit, but most of the time the pilot needs cleaning or the thermocouple is at fault and you would need a new thermocouple. Below we have a YouTube Video made by Luke Stafford which shows how to change a thermocouple. Thanks so much Mr. Stafford for making this video! If you have any other questions please feel free to email us at: firstname.lastname@example.org or respond in the comments section near the bottom of this page.