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Old 11-01-2011, 07:50 PM   #15
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Quote:
Originally Posted by Francesca View Post
I just read back through the thread, and don't see a post from you as to whether you solved the problem you originally asked about...
You'd stated that the furnace had no issues until you installed the digital thermostat...maybe I misunderstood, but I took that to mean that the furnace functioned o.k. before that change.
If that's true, my hunch is that functional problems are related to the thermostat change and not to the furnace itself.

Francesca
The furnace had only been run for about 2 days or so before we replaced the thermostat, and was another 24 hours after that before it started acting up, so it wasn't exactly much to go on in terms of deciding if it was the thermostat or not. Add to that that the first few days the weather wasn't bad, then it started cooling down outside.
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Old 11-10-2011, 05:16 PM   #16
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Well, I discovered a few days ago what the issue is, now I just have to pinpoint the location of the problem. By listening to the furnace every time it came on, I discovered that on occasion it will not spark. Within 10 seconds of turning on, there is that distinctive "click" most times, but if it doesn't do it, I know it didn't fire.

Hoping to try and clean up and troubleshoot accessible connections this weekend, but at least for now, I know to cycle it right away, instead of having cold air blowing in for a few minutes before noticing.
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Old 12-09-2011, 12:40 PM   #17
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Well, I brought in the furnace to be checked out, they cleaned it all up, and ended up replacing the motor. It was getting pretty tight, and I guess buried down deep inside was a wasps nest as well.

It blows much better now, much more force. We found out this morning that it still has an issue with occasionally not igniting(no click). Nothing like waking up to a 49 degree motorhome. Once again the stupid little heater didn't kick on to counteract it (I need to get a better one dangit). I'll be calling them back in a little while about it.
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Old 12-09-2011, 03:22 PM   #18
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A land (circuit path) on the control board of my old coleman unit would open up at times (board flexing) when the unit heated up resulting in it shutting down. You may have a simular heat related issue. I replaced my control board with one of the dinosaur brand ones. I also implemented the blower shut down at lockout feature of the board so the the blower did not keep running if the board went into lockout. Simple wiring change of the unit.

Dave
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