I recently replaced the heater core and everything seems to work except the heater fan
This is on a 1995 Blazer 4 door, 4WD
Any suggestions?

 

Sorry.
This is on a 1995 Blazer 4 door, 4WD

 

I would suggest start looking at the HVAC control wiring and plugs, as the blow motor fan is actually under the hood so there's not much you could have done with it, unless you unplugged the motor or resistor when getting the evap box bolts out (if you took it out that is, most don't bother pulling it completely out...)

 

Thanks for the reply, I have checked the connections on the back of the heater/AC panel. I think they're good.
I searched for the location of the fan relay, and learned it's one of the relays that are at the rear of the engine compartment near the heater hose connections>
I'm hoping I jostled a wire/connection while re-connecting the heater hoses.
I'll check that tomorrow.

 

I found that the orange wire has no power with the heater selected and the fan speed selected to high.