Warm AC one side only

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Sep 30, 2008 | 09:42 PM

ssir terrence

Thread Starter

Joined: Sep 2008

Posts: 5

Warm AC one side only

Can't figure how this is happening
My ac is warm on the drivers side and cool on the passenger side
After driving about 20 minutes it cools down but still not enough to say the ac is working fine
Is there an air box under the hood that is stuck or what

Oct 1, 2008 | 06:57 AM

Space

Joined: Jul 2008

Posts: 33,585

From: Beach`in Florida

RE: Warm AC one side only

Hi Terry, from the SunShine State of Florida

and

Welcome to the Monte Carlo Forum.

It would help to know what year/model of Monte Carlo

that you have ?

SpaceReSearch on similar problem with A/C

Hope it helps

[:-]

The problem is the servo motor that swaps the vent door from the cooling coil to the heater coil.

Answer
before you tear apart the dash to get to your driver side servo motor-disconnect your battery for 5-minutes, with both front doors open reconnect your battery(this resets your on board computer),then turn your car on and turn your a/c on to high with the coldest setting on both sides for dual air systems and leave the car running for a few minutes. you will feel the air cold again. there is a sensor on the passenger side that will trigger the servo motor to not move if the front door is closed. servos usually get stuck after the power was cut off. if this does not do it, have your a/c sytem checked for leaks.

Answer

This is a Dual Climate System. If you're not familiar with this setup, there's a driver and passenger climate setting. The passenger setting **** is on the right of the climate control console. If you have already properly adjusted this setting, there's a problem with the servo motor being out of the preset range for the a/c & heater doors. Every time power is cut from the unit, the servo resets the doors by doing a "sweep" from full cold to full hot maximum range. Over time the servo will fall out of range from constant full range flexing, and the part that controls the range limit must be replaced. Reseting the main module by disconnecting the battery has a slim chance of successfully fixing the issue

Terry, `if the above information does not help, please wait for one of

our Expert Tech Members to respond to your questions.

Look forward to your future posts, and please submit some pictures of

your Monte Carlo. Good Luck from `Space

Oct 1, 2008 | 11:52 AM

rysZ34

Joined: Mar 2008

Posts: 784

RE: Warm AC one side only

If you have the dual climate control your unit may be starting to fail. If it was a problem with the whole system under the hood, it would be warm across the board.

Oct 3, 2008 | 03:02 PM

Endo

Joined: Apr 2007

Posts: 115

From: Ohio

RE: Warm AC one side only

They're right! (as they always are) It's the little door in the middle not forcing the cold air your way. I had the exact same problem the day I brought mine home.