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2002 Buick Rendezvous Heater Fan

Tiny
LAWNJOHN
  • MEMBER
  • 2002 BUICK RENDEZVOUS
  • 3.4L
  • V6
  • 2WD
  • AUTOMATIC
  • 215,000 MILES
I have been having problems with my fan of it keeps shutting off and after a while it would start back up. Until up until now it has been doing so for a while. I see now it won't go back on. Would that sound like the module doing that?
Friday, January 9th, 2015 AT 11:02 AM

6 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuse and relay under hood fuse box first then have a pro scan it to see if it actually is the control head or something else.
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Friday, January 9th, 2015 AT 12:02 PM
Tiny
LAWNJOHN
  • MEMBER
  • 4 POSTS
Do you have a diagram on the fuse box?
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Friday, January 9th, 2015 AT 1:04 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
You need to go to floor console fuse box and get 25 and 26 those operate both of the hvac blower and control check fuse and relay under hood pointed out and others under hood pointed out. See pics
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Friday, January 9th, 2015 AT 1:37 PM
Tiny
LAWNJOHN
  • MEMBER
  • 4 POSTS
Well found the culprit. After checking both fuses. Just replaced them for what they are worth. And also looking under the the hood at the relays. Found 4 that were the same. But checked two of them with ohms meter to see if both had the same reading and they did. Finally going down the line, took the blower out and it checked ok. Then to the module. Oops, plug burned out, will take the module to the auto shop and see if they can test it and get a new plug. If all goes fine, should have it back together on Monday. Thanks guys.
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Saturday, January 10th, 2015 AT 3:01 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check to see if the heater module has to be programmed to your car it may have to be is so a pro will need to do it.
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Saturday, January 10th, 2015 AT 4:28 PM
Tiny
LAWNJOHN
  • MEMBER
  • 4 POSTS
I have changed one in my Chev van and it didn't need to be programed.
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Saturday, January 10th, 2015 AT 6:40 PM

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