A/C and heater control issues
#1
Senior Member
Thread Starter
A/C and heater control issues
Here we go again... This old 91 F150 is driving me nuts. This isn't a real deal breaker, but it still bugs me. The fan for the A/C and heater is either off (in the 3 lowest settings) or on (full blast). Is this the dash control, or would it be the blower, or something in between? Thanks for any guidance!
#2
Senior Member
Suggest that your blower motor resistor has failed. Hi-speed bypasses this resistor block, thus the reason the fan still works on that setting. Should be a separate module up under the dash somewheres - follow the wiring from the control panel switch to the blower motor.
#4
Senior Member
Thread Starter
wde3477, you were right on! The resistor was mounted right on the blower housing, which was even better. $18 part, 2 screws, 5 minutes, and it works... Why can't they all be like that??? Thanks!