A/C Fan not blowing.

RDC F250 7.3 · #1 (**permalink**) 07-16-2008, 09:57 AM

A/C is getting cold. Nothing is in the intake area. Just really low or no air blowing from the fan. Going down the hwy @ 65 mph . When the fan does blow, its very up & down with the speed, every few seconds.

Pulled the fan out checked it, blows fine in all speed settings.

Please Help

UP_There · #2 (**permalink**) 07-16-2008, 10:15 AM

sounds like a Voltage issue to me, 236K ain't bad on the original A/C motor! More will chime in shortly I'm sure....

RDC F250 7.3 · #3 (**permalink**) 07-16-2008, 10:48 AM

Need to update, 255,426 miles today. I live in FL, so my AC runs wideasss Open for 9 months of the year.

Fan Spins great,

What controls the A/C, And A/C MAX. Whats the Diff on this.

RDC F250 7.3 · #4 (**permalink**) 07-16-2008, 10:51 AM

Pulled the plug off the back of the fan motor, 13.8 volts there.

Markadeck · #5 (**permalink**) 07-16-2008, 01:30 PM

Does the fan blow on high when first started? If so, there is a chance your evaporator is freezing up and blocking the air. If it does not blow at all, even on heat or vent you have something wrong with the motor. I've been having to tap mine with a hammer a couple of times a year for a long time to REMIND it to spin.

RDC F250 7.3 · #6 (**permalink**) 07-16-2008, 01:53 PM

Turned out to be the fan motor. When it ran, it was surging. Then would stop. Overheating, then come on after it cooled down. Replaced Fan Assy. Good as new.

Its hot in FL!!

Cool in my Super Duty!!!!!

UP_There · #7 (**permalink**) 07-16-2008, 01:56 PM

I hope ya get another 255,000 outta this one! Thanks for the follow up!