2002 Buick Rendezvous Heater Fan

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.

Do you have a diagram on the fuse box?

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

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.

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.

I have changed one in my Chev van and it didn't need to be programed.