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A little more info would help.What year and model,engine ,A/C or not .Could be the fuse, switch.Do you have power to the motor?
91 F250 Lariat
2 W/D
7.5l engine
factory A/C
3 Weeks ago it took a few minutes for the heat to come on. (this was a first)
came on and worked fine. all speed settings present.
the next day it didn't operate at all and hasn't since.
replaced the blower motor first with no change. replaced the resistor today with no change. haven't been able to locate any associated fuses. replaced two under dash fuses that were blown but there was still no change.
Hey Sam, I was lookin' for a wiring diagram for the blower/heater circuit but can't find one.Don't know if there is a fuseable link in there somewhere or not. You mite try lookin' under the dash for loose wires to the switch. Could be the switch went south on you. Get you a volt/ohmmeter and do some checkin'. Sorry I'm not much help for ya. Good luck.