Originally Posted by Rvdude22
I am having an issue with my ac and my furnace flickering like a power surge. I know the issue isnít in the main power because I have a surge protector on the pole. I also know that the fan motor was replaced on the rv a year ago by the previous owner along with a part on the furnace which I do not remember at the moment. Iím not sure where to start to look. I am also having an issue with the furnace not shutting off I do have the switch where I can change from ac to off to furnace. When in the off position this morning the heater after being in the off position for 5 hours itís still blowing slightly warm air into the rv. All of this is on a 2007 keystone cougar fifthwheel.
First off you need to determine, is the burner running? Is it just the blower? You stated that it was blowing slightly warm air? Yes it could be the stat, but you need to prove it before running out & buying a new one. Unless of course, you want to have a spare around just because. And then you say you have "flickering but have a surge protector? SP's work with tolerances. A surge (spike in voltage) is not the same as a dip in voltage, AKA a brownout if it lasts more than a couple seconds. Biggest thing you could do is to get a digital volt/ohm meter & learn to use it correctly before jumping into conclusions. You very well could be having 2 different problems going on here. I spent 30+ years in an HVAC business & can't say I seen it all, because when you think you have, something else always pops up!