Question about 2000 Chevrolet Silverado
I have a 2000 Chevy Silverado ZZ1 wih a 5.3Litre and it has 125,000 miles.
Recently the ac temperature blows from a cool 58 degrees to then hot air (not heater air) while the ac is set on and in recirculating mode. When this accurs I turn the ac off for 2-3 minutes and then back on and wah-la cold air again until 3-4 minutes later it happens again. I have checked to assure the compressor belt is there (which it is) and checked the freon pressure which is also dead on. This seams to only happen during the day, unfortunitly for me when it is about 90 degrees. During the early morning and night it has yet to accur. Is this a relay, thermastat or switch issue or something more complex. Help me out, my window motor windings have also gone out and am in Florida. Get the picture....
Be sure to check your vacum hoes sometime if there stop up they wont let the air circulate
Posted on Sep 24, 2008
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Posted on Jan 02, 2017
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Feb 16, 2013 | 2000 Chevrolet Silverado 1500
Air Temperature Control Blend
all modern cars there is a tiny DC electric motor driven gear drive
that moves a plastic door that blends heated and cooled air from the
AC and the heater core, this is called (interestedly enough) the air
temperature control blend door actuator. The motor that moves this
door fails because the door starts sticking from warping, most common
complaint is no heat but it can be no AC as well. To replace these
parts (blend door and blend door actuator) you must remove the entire
dash from the car. Always have this problem confirmed by a dealer or
qualified repair shop as it is a very expensive repair.
Also try disconnecting the battery negative cable a few times for 5 minutes to see if the systems are just out of sync.
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