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Friday, November 18, 2011

It pays to investigate.

Last night I spent a lovely evening visiting my daughter, with my motorhome parked in her driveway. When I went out to my motorhome to go to bed, it had gotten quite chilly so I turned on the furnace.


In the past, lack of ignition has been fixed by various actions:
  • Turning it off and trying again in five minutes.
  • Pushing a reset button on the furnace.
  • Removing the defective thermostat and connecting the wires.
  • Replacing the thermocouple.
  • Replacing the circuit board.

The first 3 of these I can do myself with no problem, so I set about troubleshooting. It was cold out, so I decided to skip the reset button and go directly to investigating the thermostat. With the cover off, I operated the lever and found the problem.

During the day, a moth had crawled up into the thermostat and was blocking the contacts. I guess moth corpses don't conduct current very well!

I removed the moth, slid the levers, listened to the satisfying sound of propane ignition, replaced the cover, and went on with my life. Grateful for solutions I can handle.

The moral of the story: before you call a repairman, check out what you can check out yourself.


  1. Doc Holiday7:43 AM

    I guess thats what they mean when they say there is a bug in the system.

  2. Wow, I never would have guessed moth corps

    The Tuckerbag

  3. One for the records for sure...


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