**"nuclearmateo":*'ve been troubleshooting this furnace myself for several years, never had a problem that a new ignitor or flame sensor wouldn't fix, until today.
This morning, had an error code on the trouble light - one flash every second. Shutting down power to the furnace for several minutes cleared that. Upon startup, everything functions as normal until the main blower is supposed to come on - and it doesn't.
Sounds like the relay to kick on the blower fires at the appropriate time - how do I troubleshoot **/quote:*
#1 gas furnace * 120v blower mtr
#2 speed red/low