Question about Cars & Trucks
Ac compressor not engaging while ac switch on, but ac compressor gets on when main current give to ac compressor.
There could be a few reasons why the ac is not working, if you power the compressor it turns on, that means the compressor clutch is working.
The system may be low on freon gas, the next step would be to have a shop hook up to ac system and check gas level. it may be as simple as the system being low. if it is low there may be a leak so have them add dye to the system if it is low.
the system is under pressure caution if you are not ac certified i would not mess with it. adding gas when not needed will cause compressor failure and may even blow hoses, be careful.
I would say the next step would be to check your fuses and then have the freon amount checked, good day
Posted on Nov 03, 2012
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Posted on Jan 02, 2017
I pulled this from another web site
"The AC clutch relay is located inside the cab on a metal bracket that is easiest to see when you remove the glove box compartment.
The relay is on a metal bracket bolted to the top of the plastic air box, forward and to the center of the dash from glove box.
There are three relays in a row on that bracket. The AC clutch relay is the end one closest to the driver’s side."
Posted on Aug 18, 2009
Testimonial: "Right on target... THANKS"
you either have a power loss problem but more likley your low on refrigerant. if its low, there is numerous pressure sensors that will not allow it to engauge to protect the compressor. you got to put a gauge on it. standing system at 80"F should have about 80-90 lbs. standing pressure.
Posted on Aug 25, 2009
Sounds like your a/c system is low on freon, system has a low pressure switch which disables a/c compr.so that it don't damage a/c compr, it would be kind of like running an engine with on oil it would damage an engine, what needs to be done is have dye injected in to a/c system to be able to fine the leak, once leak is found can be repaired and recharge with freon, system will work good after repair has been done.Good luck
Posted on Dec 17, 2009
Dear Madam or Sir,
this concern is prpbably due to a lack of coolant. There is a pressure sensor monitoring the system pressure of the A/C system that will interrupt the activation of the A/C compressor to prevent it from being damaged.
If there is not enaugh coolant, the system pressure will drop below a fixed threshold level and the compressor protection circuit will activate.
So you should have the coolant level to be checked at the shop, if it´s OK, put an eye on the pressure switch itself :)
Posted on Jun 27, 2010
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