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2013 Chevrolet Suburban
Platform: GMT 400, 800, 900

2008 Tahoe ac problem

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Old May 3, 2013 | 1:15 PM
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Default 2008 Tahoe ac problem

Light blinks 3 times...

Temp outside was hot..

Pressure was to high...and compressor kicks on... So I let some pressure out..

Seems there is a blockage where you add refrigerant or test for pressure...one line is cold but return stays warm...... No leaks... Any ideas?
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Old May 3, 2013 | 8:49 PM
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AH. Never just let some gas out of your system. The line after the set oriffice is supposed to cold and the return to the compressor is only supposed to be a little cold to cool. Not warm, but definitely below ambient temp.
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Old May 3, 2013 | 9:04 PM
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Welcome to the forum.

How was it determined that the pressure was too high? Was the High Pressure switch activated? Was freon just added?

The low pressure gas line will be cold and the high pressure liquid line will be hot.

The ambient temperature sensor could be bad and indicating a temperature below 38*F which would prevent the compressor from coming on.
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Old May 4, 2013 | 8:15 PM
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I was south on a vacation and hasn't used ac all winter. Went to a napa or autozone and they checked pressure.... The light finally did stay on and the compressor was kicking on, pressure was way to high , like off the scale. The guy let some freon out....this happened a few months ago.

Today...weather 77 up here in northern Ontario, light wouldn't go on as usual...then notice the light is on...but no cold air... Light went off shortly after and wouldn't go back on.

I checked pressure and it is in normal range.
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Old May 5, 2013 | 3:58 PM
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Was compressor running when the lite was on?
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Old May 5, 2013 | 7:33 PM
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Yes...compressor was running when the light was on.
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Old May 6, 2013 | 8:19 PM
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If you have never added freon and the pressure was too high, then there might be a restriction in the system.
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Old May 7, 2013 | 8:03 AM
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Taking it in on Wednesday....let you guys know what happens.
I think there is a blockage....somewhere...

Compressor is now running but doesn't sound healthy... I'm just going to bite the bullet
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Old May 9, 2013 | 8:16 AM
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Best thing to do. Fact is without proper gauges, you can't tell what's going on. Same with just adding or removing refrigerant. Without knowing how much is actually in there, you are guessing and may actually make a small problem, expensive.

Good luck.
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Old May 9, 2013 | 1:49 PM
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Well, compressor sounds bad, And high pressure... Seen this before. Compressor is eating its self and the metallic paste is blocking your system. New Compressor are about $2-300 (sometimes more)
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