Question about 2001 Chevrolet Monte Carlo

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Dual zone temp. controls.. driver side all the way down, yet feels "warm" when a/c is on - compared to passenger side which is cold.. When comparing the passenger side setting to where the temp feels the same as the driver side, its about half-way.. Is there a way to check if the switch is out of adjustment? If not, any fixes or adjustments that can be done without taking it in for service?

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There is a side by side control switch ,one side has gone out, call parts store and ask them where it is and what it takes to replace it, i think the switches are about 100.00 for that, hope to help

Posted on Jul 16, 2009

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Posted on Jan 02, 2017

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My hvac...,outside temp is 40 and i have auto temp at 70 degrees. Wents on drivers side bkow warm ajr as they should but passenger vents blow cold air. Any insight?


Does the system have dual controls ? One set for driver and the other for the passenger. Sounds like a dual control system- if it is then there is a problem with the controller.

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Jul 27, 2010 | 1995 Buick Riviera

1 Answer

2005 grand caravan. dual zone heat controls...drivers side heat is blowing cold, won't warm up. Is it electronic or could a coble have come loose?


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1 Answer

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On a w body car with a single temp adjustment control (not a dual zone) your problem should be a low refrigerant charge. Due to the design of this evaporator, a low refrigerant charge will cause the furthest areas from the inlet and outlet hoses (the drivers side) to not remove the heat from the incoming air. This allows the air on the drivers side to be outside temp but refrigerated on the passenger side. In cars with Dual Zone controls you must not only verify the refrigerant charge level, but also check the mode doors which control the air flow and regulate the temp. To check the refrigerant level do not use pressure gauges alone. Verify a proper charge level by checking the temperature of the two aluminum lines going in to the firewall of the vehicle. With the A/C set to high the temperatures should be within 5 degrees of each other. If not, then there is a charge issue. I hope this helps

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3 Answers

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I would assume with multiple people having the same problems, there should be a service bulletin on this issue. may want to call dealer with vin # to verify. sounds like a heater control issue under the dash. something i would leave to the experts for repair

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