Question about 1999 Chevrolet Monte Carlo

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No cool air out of drivers side

Replaced blend door switch and still same problem....where does signal come from to the switch

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If you have cold air on one side and not the other it is usually from low refrigerant,the area closest to evaporator core is usually the coldest,are you sure this is not your problem?

Posted on Jun 26, 2009

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Posted on Jan 02, 2017

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2 Answers

Why would cool air blow out the driver side and hot air blow out the passenger side on my 03 cadillac cts?


This is caused by a defective air temperature control blend door actuator motor or a jammed blend door or in most cases both..

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could be blend door or possible heater core is half clogged check your blend doors and also check your switches for heater control start with checking switch

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2006 buick lucern blowing hot air on one side and cold on the other side


Do you have dual zone cooling? If so, you have a bad air blend motor. I had to replace 3 on my 07 Impala and the basic geography of the part locations are the same for your Lucerne. There is one to the left of the radio well back into the dash, one to the right and one by the passenger side kick panel, near the door hinge. They are not for the faint of heart to replace. I had to replace mine because they were clicking and sounding obscene. They run about $25 each. Determine which is faulty using this rule of thumb:
Drivers side uncontrollable: replace far left blend motor
Passenger side uncontrollable: replace one just to the left of the glove box.
If you cannot switch between outside air and recirc, replace the one to the right of the glove box.
The blend control motors look eerily similar to a quartz clock movement you'd find in a hobby store, however, that is where the similarity ends.

Hope this helps

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3 Answers

Driver side blowing hot air passenger side blowing cold air


I'm having the same problem except on mine it's the driver's side that's blowing cold. Do you have the pictures in a finer resolution? I can't make them out and when I zoom, they are too grainy. Does the replacement require removing the dashboard? What's the general cost of the acuators? Are they readily available at like NAPA or other parts stores?

Nov 26, 2011 | 2006 Kia Amanti

1 Answer

Blend door stuck on heater position and driver side blowing hot air while pass side blows cold air. How do I switch driver side blend door back to ac mode?


I had this exact problem in a 2000 and it ended up being the air filter (engine compartment, pasenger side cowl)-all I did was replace it and both sides worked properly-you could try removing it and see if that solves it, if not I would think either the climate controller has a problem (vacuum line?) or maybe the blend door itself needs to be adjusted-hope this helps

Jun 25, 2011 | 1999 Oldsmobile Intrigue

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My air conditioning works, that is, the air is


Check under the hood on the passenger side, look for a vacuum line that goes into the fire wall, check that it has vacuum to it, that what gives it the power for the vents.

Jul 14, 2010 | 1997 GMC Jimmy

1 Answer

Dual AC not cooling on driver's side. Is there a fuse for this?


There are two blend doors with actuators in models with separate controls for driver and passenger in the HVAC unit. Apparently the driver's blend door is broken/jammed, or the actuator is not working. You'd need to check a service manual to determine how hard it is to get to and repair the driver's blend door.

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2 Answers

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Check vacuum hose that open interior vent doors. Air cannot get through to routing hoses most likely.

Aug 07, 2009 | 2000 Buick Regal

1 Answer

NO COLD ON PASS SIDE A/C - DRIVER SIDE WORKS OK


Your truck has blend door actuators that go bad. each side has them . giving you the problem that you have. and in some cases the actual a/c control mod goes bad. Putting the truck on a scanner at the dealer ship they can look at each blend door and comand each one to open and close and find out witch one is not working. or you can buy the pass side blend door actuator / motor the one for the a/c heat blend door and replace your self its not to bad to get to on pass side. you can have them print you out a diagram when you buy it.

May 25, 2009 | 2005 GMC Sierra 2500HD 4WD

1 Answer

Driver's side blows warm air, rest of the vents blow cool


It has a broken blend air door on the drivers side.The heater box will have to come out ,and the door replaced.

Apr 08, 2009 | 2005 Dodge Caravan

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