Karl messner
New Member
I have an old oil furnace. And no the blower will not come on in the auto position. It does come on in the on position on the thermostats for the blower motor is fine.
So that sounds like the fan limit switch.
So I bought a new fan limit switch and hooked it up.
And it twists right past the fan off and Fan on text and keeps going to the safety off and then the whole thing shuts down.
There is a transformer and relay mounted on an electrical box below that and the transformer and relay it was replaced last year like an HVAC Pro.
What should I check next?
So that sounds like the fan limit switch.
So I bought a new fan limit switch and hooked it up.
And it twists right past the fan off and Fan on text and keeps going to the safety off and then the whole thing shuts down.
There is a transformer and relay mounted on an electrical box below that and the transformer and relay it was replaced last year like an HVAC Pro.
What should I check next?