Question about 1999 Chevrolet Blazer

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My air conditioner isn't working blowing hot air

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First check the fuses / relays then if good more than likley the system is low on freon.If the system is low nothing would work either.The 1999
system uses 134A Freon which you can get without a certificate at many local parts stores.Install the freon on the low presure side!

Posted on Aug 05, 2010

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Why when I start my car is there an odor coming from vents that smells like something is burning, and my Air Conditioner still blows, but it only blows out hot air. 2008 Chrysler Sebring. Help?


have an accredited ac shop as an ac cannot produce hot air only cold air so that means that the ac is not working (leaks low on gas etc). The hot air is from the heater in the car and the smell is probably wire overheating or the resistors are burning.

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Check whether the warm air isn't going in with the cold air .Coolant line that runs into the firewall on the passenger side of the engine which is toward the bottom half of the firewall on the passenger side. If there is warm air going into the vents with the cold air then it blows warm air. You may have to shut it manually because it gets stuck sometime. Check it out.

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Air conditioning is one area where the owner generally is not qualified or equipped to perform the necessary repairs. If you are overheating and the ac isn't cooling I would check the condenser (radiator in front of the engine radiator) and made sure it's not obstructed. Also make sure that the electric fan comes on when you engage the A/C. Beyond that there isn't much you really can do except have an professional run a diagnostics on the system.

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A/c works on and off, blowing hot air replaced pressure switch,orifice tube and recharged


If it is blowing hot air, your climate control door isn't shutting off the heater core air inside the car. Take it by a decent auto repair center to check out the door.

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You need to check your freon level. Go to your auto parts store and pick up a can of freon with a gauge and follow the directions on the can.

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Air conditioner blows hot air inadvertantly.


possibl ac compressor clutch problem,cooling fan at rad not working so ac goes into high press mode and turns off(so it doesn,t blow system apart,built in safety)not enough r134 in system(low charge)

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BLOWING HOT AIR YOU MAY HAVE A RESTRICTION ON THE SYSTEM, OR MAYBE A REAL BAD LEAK THAT UR FREEON IS ALL GONE,

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