What causes no power to AC compressor?

You will want to have the unit examined to look for signs of a blown fuse, a tripped circuit breaker, a broken thermostat, or dirty air filters. Dirty or clogged filters commonly make AC compressors stop working. When it’s 110 degrees outside, don’t set your thermostat at 65. It just isn’t designed for that.

How do you test an AC relay fuse?

The only tool required to check a relay is a multimeter. With the relay removed from the fuse box, the multimeter set to measure DC voltage and the switch in the cab activated, first check to see if there are 12 volts at the 85 position in the fuse box where the relay plugs in (or wherever the relay is located).

Does AC compressor have a fuse?

You can use your car’s owner’s manual to help locate the fuse. If the new fuse blows once it’s been replaced there is a short in the system. This relay supplies main power to the compressor via the system fuse. Locate the relay in the fuse panel or power distribution center using the owners manual.

What to do if there is no power to an A / C compressor?

Re: No power to a/c compressor, I have checked the fuses,… The trigger from the dash switch activates the relay which in turn switches on the solenoid pulley to engage the compressor to work. If this circuit is traced the fault of a open circuit can be found out. If there is no power in the fuse or relay then the main wiring must be checked.

Why is there no power in the relay?

Check for power coming to the relay and there is power in the center terminal which should always have power, but there is no power at any other terminals with AC on. Jumped power directly to the compressor and the clutch engaged and output to condenser started to get hot.

Why is my air conditioner clutch not getting power?

Air Conditioning Compressor Clutch Not Getting Power (electrical Ok. Here it goes! No power to AC Compressor Clutch. Here are the details: After researching this I’m thinking it could be the relay in the CCRM (constant control module)? Although I can’t find a good enough diagram to find it!

How to know if your air conditioner is losing power?

Here is a guide and the wiring diagrams for the air conditioner system so we can see how it works. Check fuse 10 – 10 amp for power that is what feeds the low pressure switch and see where you are losing power. Check out the diagrams (Below). Please let us know what happens.

Re: No power to a/c compressor, I have checked the fuses,… The trigger from the dash switch activates the relay which in turn switches on the solenoid pulley to engage the compressor to work. If this circuit is traced the fault of a open circuit can be found out. If there is no power in the fuse or relay then the main wiring must be checked.

Is there a fuse for the AC compressor?

Went to heater control panel, have 12 V at ac switch, (with blower on) and so switch is sending it down the line but where it goes to, I don’t know. Can’t find any fuse or breaker labelled AC. Tried running a separate set of wires directly to ac comp, it kicks in fine, draws 3.2 amps.

Where is the AC compressor on a truck?

One usually on driver side around the top of radiator. One on driver side on lines near fan solenoid. And one on passenger side on lines on cab. One is low pressure, one is high pressure, and one is fan control. I can’t remember which is which without looking. Wore out is right about if power is at the switches then probably harness.

Is the AC in my truck not working?

Discussion in ‘ Peterbilt Forum ‘ started by kwforage, May 9, 2017 . 95’ 378. AC is not working. System is charged but compressor clutch will not engage.