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The a/c compressor is not receiving power, all the fuses ok

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Check rockauto.com for an AC clutch relay for your particular car. This is usually a cheap fix..if that's the problem

Posted on Aug 30, 2010

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When the refrigerant level is low the pressure sensor prevents the compressor clutch from engaging.
Have the refrigerant level tested, or alternatively, you can purchase refrigerant and gauges at most auto parts retailers. If you decide to do that, don't overfill the AC system, since that can result in blown seals.

Posted on Aug 30, 2010

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1 Answer

No power to a/c


Do you have power at the low pressure switch ? Most times you have to jumper that switch to make the clutch engage long enough to add freon.

Jun 20, 2013 | 1999 Oldsmobile 88

1 Answer

My ac stop working,I checked compressor ,it's ok ,no power to compressor


Some possible causes are the system is low on freon, a faulty compressor clutch, faulty low pressure switch, relay, fuse, or control switch.
Do you have power at the fuse and the relay ?

Jul 15, 2012 | 2001 Chrysler Sebring

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AC Compressor not engaging on 2000 Chevy Impala. Fuses and AC relay okay. No power at compressor. Need wiring diagram. Also need to know if compressor requires 12v for operation. If not what should voltage...


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.

Apr 20, 2010 | 2000 Chevrolet Impala

1 Answer

Ac does not work i don't measure powere to the


If the fuse is ok, and you are getting no power to the compressor, then it's possible that the a/c switch in the dash is bad or loose, or it's possible that there is a problem elsewhere in the circuit.

As a test, try wiring the compressor directly to the battery to see if it comes on. If this checks out ok, then pull the switch from the dash and test it. If the switch is ok, you will need a circuit diagram to track down the problem in the circuit.

PS. Just in case you didn't know this, if the refrigerant pressure in the system is too low, the compressor will not come on. Sometimes this is mistaken as a sign that the compressor or circuit are bad. Make sure that your system has a sufficient load of refrigerant. You can get an inexpensive R-134 pressure gauge included in a recharge kit from most discount stores or auto parts stores.

Mar 22, 2010 | 2001 Mercury Sable

1 Answer

When I turn the airconditioner on or the defrosters, the heater/airconditioning fuse blows? Any thoughts on where to start looking?


Problem is in the a/c circuit. Any time the defrost is on the a/c compressor will cycle on & off as it is used to dehumidify the air directed to the windshield. That's why the fuse can blow even in defrost mode.

Unplug the power connector at the a/c compressor and see if the fuse still blows. If not, then with a dmm or vom test a/c clutch winding for short. If ok, then test clutch diode for short. The diode is usually mounted at the clutch winding, but I've seen Chevy's with a diode that plugs into fuse/relay block under the hood. I have replaced these so don't overlook it.

If fuse blows with compressor unplugged then first check circuit between compressor and a/c relay (power side) for a short. It's possible for the wire to rub a bare spot in the insulation along it's travel along the block, bracket or manifold to the compressor. If ok, then test from relay (winding side) back to switch.

Good luck.

Jun 24, 2009 | 1990 Chevrolet K1500

2 Answers

When switched to on, the aircon does not function.


check for power at compressor clutch if power and earth there is ok new compressor required. no power there check relay and fuses swap air cond relay with another one that looks the same in under bonnet fuse and relay box

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2 Answers

1997 lincoln continental air suspension


there are 2 fuses for the air suspension module fuse #28 in the inst panel fuse box and fuse #22 in the power distribution box in engine compartment make sure the fuses are good the module controls the air susp and the variable steering if the fuses are ok you will have to see if there is power at the module pins # 1, 36, 37, 56, 57, 58

Dec 08, 2008 | 1997 Lincoln Continental

1 Answer

Electrical problem


When you are disconnecting the low pressure switch, or high pressure switch, you are stopping the power going to the A/C clutch. So, that means that your A/C clutch is shorted out. Unplug the compressor, and see if the fuse blows.If it doesn't you need a new clutch or compressor.

Sep 06, 2008 | 1994 Dodge Caravan

1 Answer

2001 jeep cherokee sport 4.0L


Is there power to the A/C relay? Did you receive the wiring diagram i sent to you?

Aug 21, 2008 | 2001 Jeep Grand Cherokee

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