AC issue, compressor will not stay on at idle
09-20-2018, 11:03 PM
#1
Drifting
Thread Starter
AC issue, compressor will not stay on at idle
So like the title says my compressor will not stay on. It shows to be cycling on and off pretty much immediately. If you raise it above idle and giving it throttle, the compressor will stay on. The pressures have been checked and good. It has been filled correctly. The sensors have been replaced. The expansion valve has been replaced. The blend door actuators were replaced(from a separate issue but still new). Two different control/head units in the dash have been used. When on, it blows cold and strong. Its almost like the full throttle turn off function but it does it at idle.
Anyone ever deal with this or have ideas about fixing it?
Anyone ever deal with this or have ideas about fixing it?
09-20-2018, 11:04 PM
#2
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09-21-2018, 09:42 AM
#3
Melting Slicks
sounds like it could be an issue with the AC clutch. mine went bad, and I couldn't find replacement parts, so I had to get a whole new compressor.
09-21-2018, 09:55 AM
#4
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If you can get access to a GM Tech2, you can COMMAND it ON and see if that allows it to run at idle without shutting off.
What do you see for a DC Voltage reading on the Volt Meter gage on the IPC?
Take a voltage reading on the AC Compressor FUSE with a DC Volt Meter. There are TWO test slots on top of every fuse. Measure BOTH test slots to chassis ground and see if you are retaining FULL BATTERY VOLTAGE all the time.
You should also change out the AC Clutch relay to see if its weak. All C5 electrical components are very picky on having the proper voltage and yours may be dropping out due to UNDER VOLTAGE!!!!! Check for under voltage on that FUSE!!!!.
You could have a bad /faulty/ dirty ignition switch that is outputting less than desired voltage to those components.
What do you see for a DC Voltage reading on the Volt Meter gage on the IPC?
Take a voltage reading on the AC Compressor FUSE with a DC Volt Meter. There are TWO test slots on top of every fuse. Measure BOTH test slots to chassis ground and see if you are retaining FULL BATTERY VOLTAGE all the time.
You should also change out the AC Clutch relay to see if its weak. All C5 electrical components are very picky on having the proper voltage and yours may be dropping out due to UNDER VOLTAGE!!!!! Check for under voltage on that FUSE!!!!.
You could have a bad /faulty/ dirty ignition switch that is outputting less than desired voltage to those components.
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silver408z (09-21-2018)
09-21-2018, 12:49 PM
#5
Drifting
Thread Starter
If you can get access to a GM Tech2, you can COMMAND it ON and see if that allows it to run at idle without shutting off.
What do you see for a DC Voltage reading on the Volt Meter gage on the IPC?
Take a voltage reading on the AC Compressor FUSE with a DC Volt Meter. There are TWO test slots on top of every fuse. Measure BOTH test slots to chassis ground and see if you are retaining FULL BATTERY VOLTAGE all the time.
You should also change out the AC Clutch relay to see if its weak. All C5 electrical components are very picky on having the proper voltage and yours may be dropping out due to UNDER VOLTAGE!!!!! Check for under voltage on that FUSE!!!!.
You could have a bad /faulty/ dirty ignition switch that is outputting less than desired voltage to those components.
What do you see for a DC Voltage reading on the Volt Meter gage on the IPC?
Take a voltage reading on the AC Compressor FUSE with a DC Volt Meter. There are TWO test slots on top of every fuse. Measure BOTH test slots to chassis ground and see if you are retaining FULL BATTERY VOLTAGE all the time.
You should also change out the AC Clutch relay to see if its weak. All C5 electrical components are very picky on having the proper voltage and yours may be dropping out due to UNDER VOLTAGE!!!!! Check for under voltage on that FUSE!!!!.
You could have a bad /faulty/ dirty ignition switch that is outputting less than desired voltage to those components.