It should be on or next to the furnace, and looks like a standard light switch. Find the filter service rack or door. This is most likely on the side with the intake and outtake blower fan. Remove the ...

remove the furnace door, reach in and touch the blower motor to see if it’s hot. If so, that indicates it tried to start, but ...

The usual suspects have been checked, but the comfort problems still persist – dig deeper with these four diagnostic steps ...

The overall approach comprises the following activities: Field measurements: Evaluation of airtightness of buildings through a depressurisation test using blower doors Monitoring of energy consumption ...