Furnace cycling strangely
This weekend it was about 10 degrees and we were at elevation (9000'). When I set the thermostat at 61 degrees or lower it cycled flawlessly. When it was set to 62 or above it would run and cycle off ...
Forum Discussion
COboondocker wrote:dougrainer wrote:
I would suspect a bad Ignition module. The fact that it would run the fan for 10 seconds and then shut OFF and never try to restart points to a Module. It takes LONGER than 10 seconds for the Ignition sequence to start. Doug
But it never failed once when I turned the furnace off then back on at the thermostat...And it might've been 15-20 seconds. It was more of an estimate. It would shut off around the time I would normally hear the clicking ignitor.
This is what fools some people. WHY would it function If manually restarted?. That is why you take an educated guess and replace the Module. There is a problem in the board logic. Doug
The board logic thinks there is a 3 try ignition lock out. By resetting the wall tstat, you remove the lock out from its memory
