When I turn the furnace on, it starts the blower fan and the inducer fan and slowly the inducer fan slows to a stop by the blower fan keeps running. While all this is going on the hot surface ignition switch never stars to glow and it never fires up what could be causing this?


I believe it's the pressure switch. Check that the chimney isn't blocked or the inducer seeming weak or grinding but if those seem ok I believe that's the problem based on what you've told me.

Updated on March 7, 2018

Original Article:

Troubleshooting Common Furnace Problems With an HVAC Expert
By Dan Robbins