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ikedae's avatar
ikedae
Explorer
Jan 23, 2015

Furnace with over-active igniter

After years of lurking, I have finally come up with an issue that I have to post my own thread for!


I have a furnace that in the past couple days has decided to continue to click (sounds like the igniter) AFTER lighting. It lights up no problem, keeps the trailer nice and toasty. The clicking is not continuous, it occurs at fairly regular intervals that I have not timed because I usually notice it when I'm about half-awake. On occasion the fan will also shut off then start up seconds later. Re-ignites just fine (or stays ignited?), keeps blowing warm air.

I'm planning on trying to open it up later to see if there's anything in there that might be clogging up the fan or doing something... The outside vents have been meshed for years, so shouldn't be anything getting in that way, but I do have critters with copious amounts of fur. And my poor rig was neglected for 6 years before I got it (I've been fulltiming it for 3.5 years), so who knows what's going on in there....

I know I should give you guys the full specs of the furnace, but it's 4 AM and I don't feel like getting up yet, so I'll get to that later... :)

14 Replies

  • Ozlander wrote:
    ScottG wrote:
    It's a safety feature and it's normal.


    NO IT IS NOT.


    Yes, it is.
    The last two furnaces I've had did the same thing since new. I asked a RV tech about it and he said something about it keeping the furnace from exploding if it didn't light properly because of a thermocoil or something.
    I suspect it continues to spark until the thermocoil gets hot enough to let the system know there's a flame - but thats just my SWAG.
  • ScottG wrote:
    It's a safety feature and it's normal.


    NO IT IS NOT.
  • The more I thought about what you said, the more I'm thinking it could be your thermostat or it's wires being loose. Thermostat's are cheap and easy to replace, so you might want to think about that also.

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