Question about 2000 Chevrolet Silverado

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A/c compressor clutch not engaging on 2000 chevy silverado. checked all fuses and relays related to the system and they are fine. could it be the compressor cycle switch or that it is low on refrigerant?

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Jump high pressure switch,if it does not work charge your a/c system..

Posted on Jun 25, 2009

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2001 silverado 2500hd a/c HEADACHE


There is a good chance that the electro magnetic compressor clutch is bad and will need to be replaced. The compressor is good, but the clutch system has a short in it at the compressor's clutch, which is causing your fuse to blow.
Test the connection at the clutch for a short if you have a multi meter. If it shows you have a short, then replace the electro magnetic clutch solenoid.
Thank you for using fixya and be safe.

Jul 17, 2010 | 2002 Chevrolet Silverado 2500HD

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2000 chevy truck 5.3 liter. air conditioner works 10-15 min then stops. clutch and clutch pressure switch good, freon level good, batt and alternator good??


After the clutch disengages ( when it's not suppose to )check the voltage on the + output terminal on the clutch relay, (inside the fuse box under the hood) if you have voltage there, check the voltage at the clutch, if you have voltage there too, its the clutch. The clutch gets worn and will engage when cool,but fails after heat builds up. Check this by tapping the face of the clutch with the ac on, if it's simply a worn clutch it will likely engage for a while.

May 20, 2010 | 2000 Chevrolet Silverado

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When your R-134a runs too low it will NOT engage the compressor. You need to refill your a/c system before the clutch will engage, I also suggest finding the leak.

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Ok hear we go agian 2000 ford taurs 3.0 lit no a/c when i jump the compressor with a jumper wire. it works fine and i checked the high side swtich it works fine and the low side works ok to.


There are 3 likely problems:
  1. system could be air locked; when recharged, its possible more air than refrigerant was pumped into the system
  2. clogged or bad expansion valve
  3. AC clutch is bad; although it will engage when you jump it, the clutch could still be bad preventing it from engaging when you turn on the AC
Hope this answers your question. Best of luck.
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Air conditioner doesn't work blows out hot air


Does the compressor magnetic clutch operate the compressor? If so, then the coolant has probably leaked out of the system. If clutch doesn't operate the compressor, possible fuse blown, bad relay, or open winding in compressor clutch.

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they can be hot wired to test if its a switch or it could be the clutch to the compressor. have a freind turn it on and you look at the compressor see if the clutch inguages or not then get back to me and i can help you further.

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1 Answer

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have you had you freon checked?? there is a safety on that compressor if your system gets to low it will not allow the unit to run.. irongod

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