Question about 2005 Chevrolet Malibu

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Malibu heating and ac

Ok 2005 chevy malibu. Fan hits on all speed rear defrost works. temp control does nothing no heat no ac. Blower blows from dash vents only no defrost no foot no blend on vents no nothing. Compressor does not click on for defrost because it will not switch to defrost mode when I turn the vent selection anywhere... I press the button for the ac nothing the light does not come on and the compressor does not come on... I have frean full temp gauge holds stead at midway point I checks all relays and fuses I also replace the actual climat control unit same thing blower blows on each setting nothing else works... HELP...

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  • 72 Answers

Does the car have automatic climate control?

Posted on Apr 06, 2014

Testimonial: "2.3 eco-tech 2005 Malibu it is not the classic style I went to all three areas for a blown fuse/relay nothing... Now I have also replaceded the entire climate control unit. The car has sat for a couple of years wires are all in tact no chewing of wires etc... ac worked before plenty of freon air temp coming out of the vents is always the same no materer what temp I set it to full cold full hot air temp the same... still no movment when trying to change to windows floors foot vent only vents blow air... the blower hits on all speeds. I have disco'd the batt and reconnected it nothing am at a loss. Hope you can help John... whats left? I put my hand on the central air until and change the settings I do not feel a gear turn or any movment from inside... Thanks"

  • 3 more comments 
  • John McNary Apr 06, 2014

    also, which submodel and engine is this Malibu?

  • John McNary Apr 06, 2014

    There are 3 locations for fuses. Under hood, Left Rear, and there are fuses in the Body Control Module, which is on the right side of the center floor console

  • Rob Stabile
    Rob Stabile Apr 06, 2014

    2.3 eco-tech 2005 Malibu it is not the classic style I went to all three areas for a blown fuse/relay nothing... Now I have also replaceded the entire climate control unit. The car has sat for a couple of years wires are all in tact no chewing of wires etc... ac worked before plenty of freon air temp coming out of the vents is always the same no materer what temp I set it to full cold full hot air temp the same... still no movment when trying to change to windows floors foot vent only vents blow air... the blower hits on all speeds. I have disco'd the batt and reconnected it nothing am at a loss. Hope you can help John... whats left? I put my hand on the central air until and change the settings I do not feel a gear turn or any movment from inside... Thanks"

  • John McNary Apr 06, 2014

    Pull the gray 24 pin pigtail out of the back of the control assembly. If the plastic locking tab is at the top, then the upper left pin should have a red with white stripe wire, that should have Battery Voltage (around 12.6). The 2nd pin should be blank, and the 3rd one should have a brown wire, which should give 12V when the ignition switch is turned on.

  • John McNary Apr 06, 2014

    Bottom Row, 5th pin from the left should be black with white stripe and that should give you a good ground

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Posted on Jan 02, 2017

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johnjnail

john nail

  • 1702 Answers

SOURCE: 1999 Chev Suburban 1500 with front and rear ac -

the truck has two evaporator cores one for the front unit one for the rear unit also two expansion valves, one for the front one for the rear.

check the large a/c line going to the rear unit if the line is warm with the A/C compresser running replace the rear expansion valve.

if the line is cold then replace the rear units blend actuator motor. if the frount unit is cold then most likely the blend actuator is the problem, remove the cover from the rear unit and you will see the actuator mounted on the side of the air handler box.

the best way to indentifie the unit is to buy one so you know what your looking for.

let me know if there is any thing else you need.

Posted on Jun 26, 2011

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