Question about 2003 Saturn VUE

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My A/C suddenly stopped working and only blowing hot air. Also, the digital reading is changing sporadically to say different numbers ie, -40 degrees, 60 degrees, etc. Is this a freon problem, or something more complicated?

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Sounds like it maybe a switch problem, you will first need to see if the clutch is engaging on the a/c, this is under the hood. If it isn't then fuses for a/c may be blown. hope this helped tim

Posted on Aug 27, 2010

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Posted on Jan 02, 2017

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The trick to getting your heater working is to first determine which part of the heater system has the problem.
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If all of this is working properly, then it is time to look INSIDE the car for the problem. The blend-air door in your A/C-heater housing may not be working. When you switch the temperature control inside the car, you should be able to HEAR a change in the air flow. This applies to ALL vehicles, whether they are equipped with cable, vacuum, or electronically controlled blend air doors. If you cannot hear a difference in the sound of the air moving through the A/C-Heater housing, then chances are pretty good that the problem is with your blend-air door. If this seems to be the problem, let me know and I can give you further instructions on how to check this and/or repair the problem.

P.S. Just thought I'd mention that a pretty good infrared thermometer can be purchased at any parts store for around $40.....This is a very good investment because you can use it for many other things and is a lot cheaper than an hour of diagnostic time at most repair shops.

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