Heater Thermostat Oddness
Hi all, I have a digital Dometic thermostat that controls heat and AC, and when I try to use the furnace now, it works until it needs to turn on again because min temp is reached. I can hear some rel...
Forum Discussion
dougrainer wrote:
You have a bad FURNCE ignition module. Once the furnace blower comes on, the AC and Wall tstat are out of the picture for ignition control. This type failure is common for a bad Furnace Ignition module. It is VERY hard to diagnose. This is where years of knowledge comes in. Doug
Except the OP said when they turn the temperature up one more degree on the thermostat, it lights off. I would think a bad ignition control would stay bad under that circumstance. Maybe the thermostat is bad and only pulses the heat wire briefly which causes the fan to start up but not light off?
