How can I fix the air conditner to blow cool air?
Check that your cabin air ducting does not have disconnects and verify the fan is blowing air through the cooling condenser coil. Something may have fallen down through the windshield defroster slots and jammed the fan.
SOURCE: front aircond. blows warm. Rear air is cold
this is caused by a defective temperature control blend door actuator motor. Don't overhcahrge the system, if one part of dual climate works ok the problem is not the compressor or the system charge
SOURCE: Air conditioning not working. Blowing cool air in the back and hot air in the front.
Is there air blowing from the front vents? or can you hear the vacumm change when you change it from heat to cool..... I think it might be a vacumm problem... its a 1997 so the controller vacumm hoses may be cracking.. let us know
SOURCE: 1999 Chevy Cavalier A/C blows hot air
More likely the recharge blew a o-ring and you have a leak. When your Cavalier was blowing hot air and a recharge fixed it that means it was low on freon which lets o-rings dry out, go back to the shop and have them leak test it. They use a pressurized dye to find the problem. If it's blowing it's not the cooling fan relay, they may have meant compressor relay but I'd have a leak test done first it's not expensive and easier that chasing unknown possibilities.
SOURCE: 1999 Suburban, A/C on warm air from front vents, cold air in rear
The car uses the same freon in the front as it does in the rear. If the rear a/c is working, you either have a plugged evaporator in the front unit, or perhaps a bad heater switch. Try switching the heater to hot and see if it blows even warmer air from the front vents. If so, the heater switch is working and then it sounds like a plugged evaporator or maybe a plugged orifice tube. That is a good place to start looking. Hope this helps.
SOURCE: on my 1995 chevy blazer s-10 my face vents are not blowing air
Your heater valve is stuck open, also in a pinch you can crimp off your hose to the heater coil at fire wall. Try to find the heater valve vacumb hose under the hood see if it is bad and fixit. or some models have a cable to the valve could be broken.
First of all get the Freon level checked, if Freon/ refrigerant is low then it can cause this problem.Wen Freon is low it takes time to cool.--- So first get Ac pressure tested.It can be tested at any local car garage.Some times pressure will be checked OK, but still if Freon is getting clogged in the line/ tube then it will not reach the front , but reaches rear then front will not cool, but rear will.--------
But mostly this problem is related to blend door.
If the rear is working well and front is not I would suspect a blend door or actuator issue in the front.Double check and see if you can hear anything moving when you are adjusting temperature from hot to cold.Also check and make sure the air flow moves properly from defrost to vents and floor etc.
Either a bad blend door motor or Climate Control Assembly.
The A/C heater function selector switch combines a vacuum selector valve for
direct control of the vacuum control motors and electrical input to the
instrument cluster module.
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The blend door actuator is located behind the glove box.-----
To see blend door diagram for your Yukon Denail, click the link below :---
http://howtobyme.blogspot.com/2011/08/where-is-blend-door-actuator-located-on.html
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This will help.Thanks.Helpmech.
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