Ford Aerostar
Heater Cores and Blower Fans

What would make a 1990 Ford Aerostar blower fan for heater - vent - ac sometimes run and sometimes not?

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2008-10-16 20:36:39
2008-10-16 20:36:39

I don't know if this will help. I had the air conditioning quit cooling and found a little (under $15) switch plug that needed replacing. (It sits on a small round sliver tank on the left engine side facing the vehicle) It controlled the air conditioner going on or off. It wasn't switching on when it was hot. Replace it in 5 minutes and the air conditioning works now.+

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The blower may simply have burned out. If the blower is out then the heater probably still works.

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A bad heater blower motor resistor would effect one or more blower speeds other than high.

The year, make and model info would help but generally the heater blower motor resister is located close by the heater blower motor.

The relay on the heater/blower circuit on a Ford Escort MK6 is probably behind the glove compartment. There are two popular places that Ford puts its heater/blower relay switches. The other place would be next to the blower motor itself.

I had the same thing happening and it was the blower motor. It would come on occasionally and the finally the whole thing died.

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that heppend to my car i had to finaly replace the heater blower so it could be the same thing

Sounds like the blower motor resistor has gone bad. This is sometimes located behind the lower dashboard in the area of the glove box.

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If the heater fan works on all speeds, then the blower motor, blower fuse, blower relay, and blower motor resistor pack are all good. If the fan runs but nothing comes out of the vents, you have a 'mode door' issue (which might include a bad control head).

If the blower motor randomly and intermittenly quits and does not work, chances are good the blower motor itself is faulty, if the blower motor does not work on all fan speeds from low through high, it most likely needs a blower motor resistor.

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I have the same problem. what I do is tap on the heater blower (located below the glove compartment in the corner)which will magically make the fan work or remove the two gold Philip screws that hold the cover and spin the fan manually.


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