Two times in the past 3 weeks, my furnace didn't come on when the tstat was calling for heat. Setting back the stat then forward doesn't work. To get it going, I set back the tstat, then shut off the furnace at the emergency switch then turn everything on again.
What could be wrong with it? The installer is coming out to look at it this Saturday but I'd like to hear first what you guys think.
The furnace is a Carrier Infinity installed last September.
Thanks in advance for any help!