fan keeps quitting for no reason

[handmedown]

The fan for the A/C and heating system keeps quitting for no apparent reason and then coming back on a little while later. I can spin the knob all I want, from off to low to high but there doesn't seem to be anything I can do to fix it. It just comes back on when it's good and ready. Going over bumps doesn't seem to cause or resolve it. The A/C stays 'engaged' even while the fan stops blowing.

A friend at work says to check the fuse, then check for a short, then check the fan/blower motor itself. Any other ideas?

 

[Brock94]

Just basic electrical diagnosis-- after you check the fuse--

Check the wires, look for loose connectors (especially at the fan). Look for signs of corrosion or broken wires. Turn on the switch and wiggle wires and connectors to see if comes on/goes off. Hopefully you can find the problem that way

 

[Maniak]

It can really only be a few things..
Blower
Relay
fuse for relay
fuse for blower (I believe its in the distribution box)
switch
wires (broken/loose)
I don't think its the resister since it stops on all speeds.

This thread may help..
http://www.explorerforum.com/forums/showthread.php?s=&threadid=59717&highlight=blower+motor+relay

~Mark

 

[Jason94sport]

99% sure it's the blower motor relay. I had the same thing happen to me. It's in the fuse box on the passanger side of the engine. There's a WOT AC cut off relay right next to it. Swap them & see if it works. Bring the relay to Ford & get a replacment. It was under $10.

 

[savant]

When my exploder's heat stopped blowing, it was the blower motor that had toasted itself. It was like $15 from a scrap yard. Careful though, there are at least two different kinds of blower assemblies for first gens. I found that out the hard way.