Greetings and happy Holidays.
My wife has a 2002 Rendevous. The heater fan just crapped out 22
miles after the warrenty expired. (We live up at the Illinois,
Wisconsin Border tells you how cold!!) Anyways.. I am trying to find
out if anyone has had any experience or any ideas with this problem. I
checked the Fuses etc.. The thing was working fine, then next morning
my wife went to use it and no output from the fan Heater/AC.
Any and all advice is appreciated.
Well, some of these are controlled by a fancy climate control
computer, but most of the fan blowers still use resistors. What
happends is at "fast" the voltage goes direc to the motor. On other
speeds, they add a series resistor to slow the blower down.
This resistor is usually wire wound; the wire gets brittle, and
Usually, it's mounted in the duct, so that air blows over it, to keep
it cool, and usually very near the motor. You can sometimes get to it
by pulling out the glove box, or getting under the dash on the
passenger side. You'll find if this is it, it usually just plugs on
and off a connector and is held on with some small screws to the duct.
Perhaps someone with your model will chime in. If there are no other
problems, and the fan doesn't operate in a/c, defrost, or heat, I
would definately suspect this resistor.
They're inexpensive - $10-15 at the typical auto parts places.
First of all, My wife just heaved a sigh of relief from your post. ;-)
Is there a specific voltage or amp rating I am supposed to get? If so
where would I find the info to buy them?
If the resistor pack is out you would still have high speed. Above you state
all speeds are out. If you have climate control it would be controlled by an
electronic controller. I had to get the last resistor pack from the dealer a
couple months ago. Before jumping up and down you need to do some diagnostic
work. Depending on your mechanical ability you may be money ahead by taking
it to a good mechanic instead of throwing parts at it from guesses here.
There are some pieces of information required to start the diagnostic
1. Do you have the automatic climate control system or the manual type?
2. If you have the manual type, does the blower motor work in the highest
After that, then we can start diagnosing it if you are handy with a wrench
Does not run at any speeds.. Nada Nothin.. I hear a "CLICK" noise when
going from 4-5. (Numbers on Nob) We do not have the automatic Climate
control, I am in the Military and cannot afford something so "SHMANCY"
Find the blower motor, unplug it. Turn the fan control to the highest
setting and check for BAT+ at the connector. I believe the wires are RED and
BLK, BAT+ should be on the RED.
If that's okay, you need a new fan.
I had a 98 Buick Regal and took it to the dealer just after the warranty ran
out to have a direction signal fixed. I thought it was just a bulb and so
did the service advisor. After we changed some light bulbs, he said it was
probably something else. I told him it was just out of warranty and that I
had bought the car there and ask if they would consider fixing it under
warranty. He kind of laughed, but when I went to pick up the car, he said
he talked to the district and they OKed the fix under warranty. It was over
$200 and I paid nothing.
You might give it a try, worked for me.
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