Help Please! A/C Compressor Not Kicking On

[Sully6s]

My A/C stopped blowing cold air yesterday. I checked it today by opening the hood, starting the engine and turning the A/C switch on and off, and i do not hear the compressor cycling, or even kicking on. I know what it should sound like and that the idle should go up a bit when it cycles on, and down a bit when it cycles off, and nothing is happening.

I looked at the manual and the fuse cover under the hood and do not see an "A/C" specific fuse. Does anyone know if there is a compressor fuse or if it is tied to one of the other fuses. The blower fan works fine at all positions, but blows out hot air.

Oh yeh, by the way, I have the manual A/C not the auto temp variety.

I see the A/C relay in the under the hood fuse box, but no fuse. Could it be that the relay is fried??? I'm thinking that the compressor HAS to have a fuse in line somewhere... baffled...




-mike

[hahnjd]

Idk if this will help or not but on my last car when the a/c compressor didnt kick in I had to get a new compressor. Good luck!

[Project_dog]

Do you have the blower motor running?

[Mazda Fan]

Is there any refrigerant left? Not sure if the compressor will kick on if its empty.

[Project_dog]

Test for power at your a/c compressor.

[dd_69]

Use a different relay from the block and plug it into the ac spot. See if that works. And it should kick on with low refrigerant. My wife's car, the relay was slightly misaligned causing it to sometimes work and sometimes not. I'd start with the relay.

[wes22]

You need to check the level of your refrigerant if its to low or even to high it won't kick on at least that's how mine was were I live its about a $70 service to get all that checked. Good luck! Hope that helps

Sent from my SAMSUNG-SGH-I717 using AutoGuide.Com Free App

[flipper66]

Originally Posted by wes22

You need to check the level of your refrigerant if its to low or even to high it won't kick on at least that's how mine was were I live its about a $70 service to get all that checked. Good luck! Hope that helps

Sent from my SAMSUNG-SGH-I717 using AutoGuide.Com Free App

70 bucks for something most shops do for free?

anyway,



see if the wires are secure in the clips and plugged all the way in. after years of vibrations mine came apart.

[wardorican]

Originally Posted by flipper66

70 bucks for something most shops do for free?

anyway,



see if the wires are secure in the clips and plugged all the way in. after years of vibrations mine came apart.

Will that switch also affect if the fan comes on at all? My A/C is still cold, but the fans aren't blowing at all. I replaced my cabin air filter a few months ago, and there is no noise, so I figure it's an electrical issue.

It's happened before where it wouldn't turn on for about a day, then the next day it's fine for months.

Thanks

[Final Impact]

Originally Posted by flipper66

70 bucks for something most shops do for free?

anyway,



see if the wires are secure in the clips and plugged all the way in. after years of vibrations mine came apart.

Based upon all that has been said; get a Test light OR a DMM. Unplug the connector in this picture and turn on the AC. If the lamp lights and/or you get battery voltage i.e. 12+Volts from the plug to ground, everything from the switch through the fuse panel is likely OK. The exception is if the pump/AC compressor is low on refrigerant the low limit switch will keep the compressor off. The refridgerant in system circulates the oil to the pump. If its low, the oil won't make it to the pump and it'll burn up.

A hand held meter is worth every penny. Start there, but yes, there is a relay and a fuse. Make sure they are in place and working.