AC Compressor Clutch Not Engaging

[frey.199]

I'm pretty new to this forum and was trying to see if I could reach out and get some help, because I'm at a complete loss.

I have 1.8L 2015 sonic LT and my AC clutch is not engaging/activating when I turn my AC on. This is everything I've tried below:

Fuses/Relays Checked
Removed freon/charged with freon (Done by machine)
Passed Leak Test
High Pressure/Low Pressure Switch Checked
Bypassed the relays and the compressor engages, so I know it's working and blows cold air when on. (Yes, technically I have the AC working, but I don't want to hard wire under the hood the hood to turn my AC on/off.)

I noticed no outside temp was on my radio. Come to find out my ambient temp sensor on my grill was missing. Tried two different sensors and it shows up on my display -40 degrees.

I have not tried to drive the car or unplug the battery. I figured it would display the correct temp if working properly.

At this point still no AC and my outdoor temp reading is wrong. From my understanding, the compressor won't engage until this reading is at a certain temp.

I'm kind of at a loss of where to look next. I replaced the part I thought would fix the issue, but my display is saying it's still too cold out to run the compressor.

Any thoughts?

 

[frey.199]

Update:

I have the AC working, it ended up being the ambient temp sensor. Just a heads up for anyone else for future reference. I didn't see ANY post mention this on the forum. When you install the ambient temp sensor, you need to drive in excess 40mph for 5+ mins in order to active the ambient sensor as stated in the manual. It does not just start working by plugging it in to fix your AC issues or whatever issues you have that pertain to the ATS. You will then see the temp display on your radio begin to increase (at least for me, mine was at -40 degrees). Upon reaching 30 degree threshold, your AC compressor will be able to engage.

 

[dannyg]

Thanks for posting the fix. Now I’ll know what to do if this happens to my 2015!

 

[Walleyeye]

Where is the ATS located?


Sent from my iPhone using Tapatalk

 

[Gpina]

Update:

I have the AC working, it ended up being the ambient temp sensor. Just a heads up for anyone else for future reference. I didn't see ANY post mention this on the forum. When you install the ambient temp sensor, you need to drive in excess 40mph for 5+ mins in order to active the ambient sensor as stated in the manual. It does not just start working by plugging it in to fix your AC issues or whatever issues you have that pertain to the ATS. You will then see the temp display on your radio begin to increase (at least for me, mine was at -40 degrees). Upon reaching 30 degree threshold, your AC compressor will be able to engage.

Hello there my name is Greg and I had the exact same issue as you and did exactly what you did but my question is did you run car over 40mph over 5 min with ac on or ac off??

 

[Jerome morris]

I'm pretty new to this forum and was trying to see if I could reach out and get some help, because I'm at a complete loss.

I have 1.8L 2015 sonic LT and my AC clutch is not engaging/activating when I turn my AC on. This is everything I've tried below:

Fuses/Relays Checked
Removed freon/charged with freon (Done by machine)
Passed Leak Test
High Pressure/Low Pressure Switch Checked
Bypassed the relays and the compressor engages, so I know it's working and blows cold air when on. (Yes, technically I have the AC working, but I don't want to hard wire under the hood the hood to turn my AC on/off.)

I noticed no outside temp was on my radio. Come to find out my ambient temp sensor on my grill was missing. Tried two different sensors and it shows up on my display -40 degrees.

I have not tried to drive the car or unplug the battery. I figured it would display the correct temp if working properly.

At this point still no AC and my outdoor temp reading is wrong. From my understanding, the compressor won't engage until this reading is at a certain temp.

I'm kind of at a loss of where to look next. I replaced the part I thought would fix the issue, but my display is saying it's still too cold out to run the compressor.

Any thoughts?

Ive taken my chevy sonic 2013 in for the same thing to Big O in san tan valley and they have replaced the compressor 5 times and its still not working right

 

[Jerome morris]

My chevy sonic 2013 was taken to Big O in santan valley for ac problems now after replacing everything they could easally and 5 compressors later ac still doesnt work.Ive mentioned the blower motor or resistor,which should have been checked in the beginning.But because it would take a little more work to get to Im guessing they by passed it.

 

[ozonetrooper]

2016 LTZ Turbo sedan and my radio does not show the temperature. I replaced the sensor and have driven many highway miles already and still no readout.

I have read that the a/c depends on the sensor yet my a/c works fine.

I would really like to see the temperature working ...