I have a Super High Efficiency Comfortmaker NG furnace, model# GUH075A012CIN, serial # L934285092, manufacturer # GUH075AECIN.
Recently the furnace has had difficulty starting, what sounds like the exhaust fan turns on, some clicks, the pilot goes on, some clicks and then it shuts off and starts the cycle over again, etc.
Sometimes it just makes a short whrrr sound and a bunch of clicks, over and over.
The only way I can make it run again is to turn off the power and disconnect and reconnect the wiring to the control module. Sometimes I have to do this a few times.
Any ideas of what the problem could be?