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need help with ac for 92 buick roadmaster limited


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lksd4life
New User

Mar 5, 2011, 12:37 AM

Post #1 of 3 (2919 views)
need help with ac for 92 buick roadmaster limited Sign In

i have a 92 buick roadmaster limited 5.7with a bout 250000 on it. it has climate control. cant find the gremlin that is makin my ac/heater not work properly. when i turn it on the compressor turns on but nothing comes in. i have changed blower motor, blower motor resiester, the relay. ac an heater worked bitchen when i bought car, then just stopped. any insight would be appreciated thank you


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Mar 5, 2011, 5:50 AM

Post #2 of 3 (2917 views)
Re: need help with ac for 92 buick roadmaster limited Sign In

I'm not sure what resister you could have changed since the ATC system doesn't have one. It has a bolower speed power module that controls blower speeds.
First check fuse # 7 (30amp) fuse #6 (20amp) and fuse #3 (10amp)
Test the purple wire at the blower and see if it's getting power. If not the first suspect would be the blower power module but the Main Control head could also be bad



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lksd4life
New User

Mar 5, 2011, 4:24 PM

Post #3 of 3 (2909 views)
Re: need help with ac for 92 buick roadmaster limited Sign In

thank you very much!!






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