The latest status of my stops Coleman furnace is it would not starts after long cooling at HEAT and FAN ON positions.
I have to switch to COOL and FAN ON, let the blower turns, then I switch back to HEAT.
To my surprise, even when the gas frame up in full, blower runs with hot air blowing out, the blower motor blue wire for HEAT stays at ZERO volt!
Is my furnace do not has separate speed for HEAT? (one speed for COOL and HEAT?)
This runs for 15 minutes then having a 6 flash error code.
perhaps my problem is block vent or intake pipes?
Any idea?
Thanks