Ac compressor won't stay engaged - Ford Cars & Trucks

SOURCE: AC clutch won't engage, no voltage at the

I don't want to be a shadetree mechanic, but, did you check the fuse(s) ?

ZJ Limited

• 17989 Answers
• Posted on Jun 08, 2011

SOURCE: I have a 2003 Kia Sorento that ac is not working.

The low pressure switch is located on the air conditioning line in the right rear of the engine compartment near the firewall.

The low-pressure switch in your air conditioning system is used to interrupt power to the compressor when the low side pressure drops below 25 psi. This prevents freeze-up of the system and possible damage to the compressor. When the switch is faulty, the symptoms of freeze-up, or no compressor function, will be present. Replacement is straightforward, but requires the removal of refrigerant from the system.

If the relay clicks, you're not getting power to the field coil on the compressor and I doubt it the control circuity is the problem. We've replaced compressors on Sedonas and Sorentos for this same problem. Uunplug the compressor field coil and hook a test light between the field coil power wire and ground and have the a/c button on. If there's power there, then you have a bad field coil. You can buy the field coil separate from the compressor but you'll want to buy 2 new snap rings. one snap ring holds the pulley on and one snap ring holds the field coil on. I don't recommend messing with taking any part of the compressor apart unless you're experienced with a/c systems and have the proper equipment to recover the system. the pressure in and a/c system isn't anything to play with.

One other thing, have you checked the compressor fuse (thermistor)? I can think of checking before giving up is the thermistor. I know the connection is behind the glove box somewhere but I'm not sure where.

Hope this helps.

SOURCE: AC compressor won't engage clutch

Lots of things can cause this, I will list them, easiest first.

A blown fuse or relay can prevent the clutch from kicking in. Low refridgerant charge will also do this, the low pressure switch will prevent the clutch from engaging when there is low refrigerant to prevent damage. You may need to put more in, and you also may need to jump the low pressure switch to get the compressor going to add more in. Very rarely the controls could have gone bad, which are the buttons on the dash. Id check out the fuses, relays, and pressure in the system first. A shop may even do a free diagnosis for you.

Testimonial: "The fuse is good, but I can only find a relay for the fan motor. "

SOURCE: the compressor on the Ac system won't engage.

Its the problem related to faulty clutch or faulty clutch relay/.Its the compressor clutch that engage, and then the AC compressor starts running.If the clutch does not engage then compressor will not run. --------- Test the voltage at low pressure switch on the Freon line.If there is no voltage then problem relates to low pressure switch.By-pass this switch and see if that helps.-------

Cross over the brown and light blue wires at the low pressure switch and that should kick on the compressor and fan .So try this first.If by passing the switch turns on the compressor, then low pressure switch has to be replaced.--------
But if bypassing the low pressure switch does not helps, then problem is AC compressor clutch or faulty clutch relay.Yes there is a relay. The A/C relay is ECM controlled to delay A/C clutch engagement 0.3 seconds after A/C is turned "ON." This allows the IAC to adjust engine speed before the A/C clutch engages. The ECM also causes the relay to disengage the A/C clutch during WOT operation. The A/C relay is energized when the ECM provides a ground path for CIRCUIT 366.

----------- Also try this, applied direct battery voltage to the green terminal on the compressor and the clutch should engage.If its not engaging then its clutch issue.-------- You will have to follow the wiring diagram and test the relay, compressor and clutch.------Click this link below, it has all wiring diagrams to be followed. ----------- http://technoanswers.blogspot.com/2011/07/ac-compressor-clutch-not-engaging-on.html ---------- This should help.Thanks.Helpmech.

Colin Stickland

• 22516 Answers
• Posted on Jul 13, 2011

SOURCE: 2002 Honda cr-v ac compressor clutch won't

you change the clutch on the end with no problem ,just the nut in the middle then underneath is some more bolts if i remember correctly ,i had two of these clutches laying around and i would have sent you both as they worked but i had a clear up about a week ago and threw them in the scrap bin.same model with a 4 cyl engine and the compressor had a snail cam type mechanism to pressure up the gas which is not a very good system as they wear out too quick and they are over a 1000euros and only available from honda .