Weird A/C Airflow Problem - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-17-2006, 11:32 PM   #11
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I checked my service manual for 98s and it shows that Bonneville has a passenger temperature control and a driver temperature control. It'* possible one is not working. But my 98 (leSabre) has always felt a little colder on the driver'* side then the passenger side when it'* in cooling mode and the car has cooled off.

It'* possible you have a low charge making one side of the evaporator colder than the other side (hasn't someone mentioned that - maybe on 2000+ model) or you might have partial blockage off the evaporator core from crude that gets inhaled into the intake. Someone has explained how to open up the case in the blower area and flush the particles blocking airflow through the evaporator.
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Old 08-18-2006, 12:47 PM   #12
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Quote:
Originally Posted by imidazol
I checked my service manual for 98s and it shows that Bonneville has a passenger temperature control and a driver temperature control. It'* possible one is not working. But my 98 (leSabre) has always felt a little colder on the driver'* side then the passenger side when it'* in cooling mode and the car has cooled off.

It'* possible you have a low charge making one side of the evaporator colder than the other side (hasn't someone mentioned that - maybe on 2000+ model) or you might have partial blockage off the evaporator core from crude that gets inhaled into the intake. Someone has explained how to open up the case in the blower area and flush the particles blocking airflow through the evaporator.
No separate driver/passenger temperature controls for the Bonneville until 2000. The FSM'* are for all H-bodies and show the LeSabre and Old'* eighty-eight as well. All the different cars systems are combined/jumbled up in the sections. If it does show sperate controls for the Bonneville climate controls, then it is a mistake.

The rest of the diagnosis seems possible. If any restriction is blocking the air flow, it may be deflecting the cool air to one side or the other in the distribution channels.
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Old 08-19-2006, 01:48 PM   #13
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well, it looks like I am going to have to have a new compressor. The car was blowing completely hot air yesterday so I took it in. He rechecked it with the dye and refilled it for free, and he said he'* replace the a/c compressor with a BRAND NEW one for $400 parts and labor included. Sounded like a good deal for a brand new one
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