Should ac compressor be able to come on in winter...to oukd

[badmix]

pulled dash to replace speakers and cleaned up some old wires under dash and removed cruise control from engine bay, left electrical connection dangling and jus cut the vacuum line.

Anyways didnt mess with ac heater controls or wires. I did fix top of blend door behind glive box.

Anyways was running truck and running controls thru their cyclics to mske sure blend doors doin their thing. When i moved control to ac, i fully expected to hear compressor, it did nothing. Its 35* out right now, but being okd truck, figured it would kick on, now there is a chance im outa freon in system, last time i ran ac was long time ago, but its not even trying to come on, usually low freon will kick on and then off.

Also, i pulled black and green wire from compressor and didnt read any voltage, i checked fuses under dash all checked good.

Should i have power to compressor with ac in max position?

Yes, i know it’s winter but i would think it would work

Was reading about jumping compressor with paperclip to test compressor, how do i do that ?

 

[Abusfullofnuns]

The weather outside would not impact whether your compressor cycles or not.

 

[frankin5]

If Ac is working properly it will come in winter. It does come on in defrost mode if working.

 

[badmix]

Thats my thought, im sure uts something i did but want to jump compressor to make sure it works

 

[89 jimmy]

If I remember correctly if the refrigerant is to low, the compressor will not engage. The ac pressure switch will not allow it if too low to protect the compressor

 

[badmix]

Well, i just went out fired up truck and put ac on, compressor ran for about 10-15 seconds and shut off. I also did jumper test and clutch engaged on compressor and spun. So gonna go with low freon or something with temps

 

[TreeFarm]

Well, i just went out fired up truck and put ac on, compressor ran for about 10-15 seconds and shut off. I also did jumper test and clutch engaged on compressor and spun. So gonna go with low freon or something with temps

Cold temps will cause the suction side of the system to get low pressures. That's how a cycling system works. It engages the compressor, compresses the gas, cools the hot side with a condenser, then sends that to the evaporator where it changes from high pressure to low pressure and gets cold in the state change. The colder that evaporator is the lower the exit pressure will be. The Clutch cycle switch watches that exit pressure and when it gets low enough it turns off the compressor to keep the system from getting too cold freezing up.

Low ambient temps mean you reach that cut off temp faster since there is less heat to remove.

Just because the clutch cycles does not mean the charge is low.

 

[badmix]

Ok thanks