Question about 1998 Chevrolet Blazer

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A/C does not work.

Clutch does not engage. Checked the plug to the clutch and there was no voltage. Checked the freon. Acceptable level. What next? Where can I find a wiring diagram of the Air Cond.?

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  • Chevrolet Master
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Any chain auto parts store will have aftermarket manuals from Haynes and/or Chilton for your Blazer and they are a good investment at <$20 US.
They contain all the information a shade-tree mechanic needs.

Posted on Jul 15, 2008

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Clutch does not engage. has Freon , checked all fuses and ac relay switch. what should I do next


Make sure the clutch itself is working. Remove the pigtail coming out of the clutch, connect it directly to the battery positive and listen for the clutch clicking in. If you can hear it click, start the car and do it again, see if the clutch engages the pulley.
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Just because the clutch is engaging does not mean it has enough freon to make it cold. I would want to know what the high and low pressure gauge readings are. It may need a can or two.

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The pulley on the compressor is always running when your engine is running, but the only time
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2 Answers

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ur still way low in freon the compressor clutch is designed to disengage when low on pressure so as not to overheat and seize causing possible damage to engine two ways to engage clutch --one is to jump clutch and continue to fill or keep adding freon until clutch pulls in

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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.

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I have a 2008 escape and the air conditioner stopped working. The clutch will not engage and I put a volt meter on the plug and I get nothing. I checked the fuses, relay and diode all appear ok. Is there a...


The clutch will not engage if it is low on freon. It has a high pressure switch and a low pressure switch which keeps the power from the compressor so no damage will happen. Have the freon checked.

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The A/C system has a pressure sensor that detects the freon level in the system. If you lost freon, the clutch that engages the compressor will not engage. A good indicator is to turn on the A/C and watch the compressor/clutch assembly. If the pulley is spinning and the clutch is not, odds are you have a freon leak. Good luck!!

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First suggestion is the clutch not engaging. Check voltage at clutch plug and confirm power source, if there is power there then clutch would work unless it has failed.

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Hi Bill
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