AC just quit blowing cold all of the sudden - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

echo419 · 03-08-2022, 01:09 PM

And the compressor doesn't appear to be coming on when I turn the AC on.

Troubleshooting tips?

Worst about all of this is my 2022 C8 Vette was supposed to be here by now. So I've either got to fix this and sell it on my own or take the loss in the form of trading it in. FML

p1l0t · 03-08-2022, 02:46 PM

Does the light come on? I mean it sounds like you are going to have to do some multi-meter testing. You checked the fuses already I assume?

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echo419 · 03-08-2022, 02:53 PM

Quote:

Originally Posted by p1l0t

Does the light come on? I mean it sounds like you are going to have to do some multi-meter testing. You checked the fuses already I assume?

Sent from my SM-G975U using Tapatalk

Yes, light comes on and I have checked the fuses.

p1l0t · 03-08-2022, 03:09 PM

Replacing the compressor is only $200-300 but I would check for loose wiring first. I think there is only one wire (maybe two) that run to the compressor. Make sure you are getting 12v to it when the switch is on. That should engage the magnetic clutch.

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pope · 03-08-2022, 03:31 PM

if the refrigerant pressure is too low the system won't engage.

echo419 · 03-08-2022, 05:04 PM

I'll check this stuff out tomorrow. Thanks!

Ultramaroon · 03-08-2022, 05:16 PM

There is also a secret cheat code to switch it to a diagnostic mode. Look in the service manual for the dual climate control. It's buried in there. Will check back later tonight when I get home.

echo419 · 03-08-2022, 06:07 PM

Quote:

Originally Posted by Ultramaroon

There is also a secret cheat code to switch it to a diagnostic mode. Look in the service manual for the dual climate control. It's buried in there. Will check back later tonight when I get home.

That would be awesome!

Grady · 03-08-2022, 09:22 PM

First thing to do is put gauges on it and check pressures. For it to not come on at all it would have to be less than around 5psi on the low side. 2nd you could check to see if you are getting voltage to the clutch/clutch resistance. Once you know those items you will know what part of the system to troubleshoot further.

Ultramaroon · 03-08-2022, 09:22 PM

Quote:

Originally Posted by echo419

That would be awesome!

Alright. Look for the manuals link in my sig. Here's a screenshot of the menu drilled down to the important pages. You'll see what I mean pretty quickly.

Grady's on point. That really is the essential first step.

humfrz · 03-09-2022, 12:55 AM

Quote:

Originally Posted by Ultramaroon

Alright. Look for the manuals link in my sig. Here's a screenshot of the menu drilled down to the important pages. You'll see what I mean pretty quickly.

Grady's on point. That really is the essential first step.

YIKES! After looking at that post, I'd suggest the humfrz method - take the car into a shop and have them fix the AC.

Ultramaroon · 03-09-2022, 02:22 AM

Quote:

Originally Posted by humfrz

YIKES! After looking at that post, I'd suggest the humfrz method - take the car into a shop and have them fix the AC.

Don't lie. You already had your mind made up before even reading the thread title.

Boomerang · 03-09-2022, 02:40 AM

Quote:

Originally Posted by echo419

And the compressor doesn't appear to be coming on when I turn the AC on.

Troubleshooting tips?

Worst about all of this is my 2022 C8 Vette was supposed to be here by now. So I've either got to fix this and sell it on my own or take the loss in the form of trading it in. FML

This happened to me once when the car went in to limp mode due to disconnecting the OFT during operation. Cleared the fault code and AC returned. Maybe check for fault codes?

humfrz · 03-09-2022, 12:07 PM

Quote:

Originally Posted by Ultramaroon

Don't lie. You already had your mind made up before even reading the thread title.

Pretty much so. For me, AC stuff is NOT a DIY thing. Not much anymore is a DIY thing -

03-08-2022, 01:09 PM	#1
echo419 Senior Member Join Date: Aug 2014 Drives: 2014 BRZ Limited Location: Atlanta Posts: 3,150 Thanks: 4,291 Thanked 4,057 Times in 1,879 Posts Mentioned: 29 Post(s)	AC just quit blowing cold all of the sudden And the compressor doesn't appear to be coming on when I turn the AC on. Troubleshooting tips? Worst about all of this is my 2022 C8 Vette was supposed to be here by now. So I've either got to fix this and sell it on my own or take the loss in the form of trading it in. FML

03-08-2022, 05:16 PM	#7
Ultramaroon not playing cards Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 32,394 Thanks: 53,054 Thanked 37,230 Times in 19,309 Posts Mentioned: 1118 Post(s)	There is also a secret cheat code to switch it to a diagnostic mode. Look in the service manual for the dual climate control. It's buried in there. Will check back later tonight when I get home. __________________ service manuals

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03-08-2022, 02:46 PM	#2
p1l0t Senior Member Join Date: Jan 2016 Drives: 2016 Subaru BRZ Hyperblue Location: West Hartford, CT Posts: 8,481 Thanks: 22,744 Thanked 9,441 Times in 4,849 Posts Mentioned: 58 Post(s)	Does the light come on? I mean it sounds like you are going to have to do some multi-meter testing. You checked the fuses already I assume? Sent from my SM-G975U using Tapatalk

03-08-2022, 03:09 PM	#4
p1l0t Senior Member Join Date: Jan 2016 Drives: 2016 Subaru BRZ Hyperblue Location: West Hartford, CT Posts: 8,481 Thanks: 22,744 Thanked 9,441 Times in 4,849 Posts Mentioned: 58 Post(s)	Replacing the compressor is only $200-300 but I would check for loose wiring first. I think there is only one wire (maybe two) that run to the compressor. Make sure you are getting 12v to it when the switch is on. That should engage the magnetic clutch. Sent from my SM-G975U using Tapatalk

03-08-2022, 03:31 PM	#5
pope has a funny hat Join Date: Feb 2020 Drives: 2014 BRZ Limited Location: MI Posts: 497 Thanks: 1,171 Thanked 631 Times in 281 Posts Mentioned: 12 Post(s)	if the refrigerant pressure is too low the system won't engage.

03-08-2022, 05:04 PM	#6
echo419 Senior Member Join Date: Aug 2014 Drives: 2014 BRZ Limited Location: Atlanta Posts: 3,150 Thanks: 4,291 Thanked 4,057 Times in 1,879 Posts Mentioned: 29 Post(s)	I'll check this stuff out tomorrow. Thanks!

03-08-2022, 09:22 PM	#9
Grady Senior Member Join Date: Jun 2017 Drives: BRZ Yellow, Ranger, Evora, WCM S2K Location: Dallas Posts: 1,712 Thanks: 354 Thanked 1,500 Times in 786 Posts Mentioned: 14 Post(s)	First thing to do is put gauges on it and check pressures. For it to not come on at all it would have to be less than around 5psi on the low side. 2nd you could check to see if you are getting voltage to the clutch/clutch resistance. Once you know those items you will know what part of the system to troubleshoot further.

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