Furnace kicks on. Home temp reaches desired temp. Then the burners turn off but the blower keeps blowing. Normally the blower turns off after approx 100 seconds but occasionally will continue to blow and the only way to turn off is the fuse box. Can it be the switch above the burners or the switch that is by the blower?


The blower usually only does that when there is a fault. If no fault and no changes have been made recently then perhaps the board is going bad and there is a short causing the blower to run continuously. Can't say that for sure but this is what I'd be looking at.

Updated on January 24, 2018

Original Article:

How to Figure Out What is Wrong With Your Furnace
By Dan Robbins