Ac issue...

legendary70 · 09-14-2022, 12:26 PM

My 2017 camaro. Every now amd then the ac won't cool. When I disconnect the negative terminal for about 5 minutes it works fine.

Why is this happening?

When it happens it won't cool amd after I turn the car off the fan on the engine stays on for a longtime.

legendary70 · 09-15-2022, 06:56 AM

Anyone ever dealt with this? thx

arpad_m · 09-15-2022, 07:07 AM

I'd check the thermostat, the A/C could be turned off and the engine fan running for a long time after key off because the ECM thinks the engine is overheating.

95 imp · 09-15-2022, 07:28 AM

No codes?

ctrlz · 09-15-2022, 09:39 AM

Need more information.
When the A/C works, does it work fine? Adequate cooling when the vehicle is moving as well as when it is stopped? Duct temps always cold on both passenger and driver side?

What is coolant temperature gauge doing while driving or at standstill?

Could be problems in two systems: engine cooling and A/C.

legendary70 · 09-15-2022, 10:58 AM

No codes. No check engine.
When the AC works it works great when stopped or moving.
gauge is normal. not moving.

ctrlz · 09-15-2022, 11:31 AM

Quote:

Originally Posted by legendary70

No codes. No check engine.
When the AC works it works great when stopped or moving.
gauge is normal. not moving.

So, I think arpad is on the right track. You have an engine cooling fan problem which may be related to engine thermostat or may be the fan itself.
What is your coolant temperature reading?

KirkH · 09-15-2022, 02:40 PM

On mine, it was the thermostat. Replacing the thermostat is one of the easiest DIYs on this car. I got an ACDelco at Autozone for $75 but I have a commercial account. Expect to pay $100.

legendary70 · 09-16-2022, 04:32 PM

K great. Temp seems normal. I will change it out.

But would a thermostat cause the ac not to throw cold air?

GXP08jrf · 09-16-2022, 06:43 PM

Generally, Yes. A bad thermostat will eventually result in A/C shutting off. Because the condenser is forward of the radiator, the a/c will eventially turn off at a prescribed coolant temperature to reduce load both on the engine and cooling system.

The air exiting the condenser is warmer and it takes several HP to spin the compressor.

ctrlz · 09-17-2022, 06:57 AM

Quote:

Originally Posted by legendary70

K great. Temp seems normal. I will change it out.

But would a thermostat cause the ac not to throw cold air?

I would not be in such a hurry. For those who replaced the thermostat, was the temp gauge behaving completely normal prior to replacing? Mine, for example, climbs to ~200 and stays pegged.
This post shows exactly where mine stays put:
https://www.camaro6.com/forums/showp...4&postcount=11

STEVE41 · 09-20-2022, 04:56 AM

your thermostat is bad, just replace it.

Odabo · 09-20-2022, 10:53 AM

IDK about the Camaro but years ago I had a similar situation on a Buick. Replaced the thermostat to no avail. Finally resolved the issue replacing a relay that controlled the AC. That was on a 1980s vehicle, therefore it may not apply here.

Puddin · 09-22-2022, 04:30 PM

Yeah if your temps are normal it's not your thermostat. The actual temp sensors inside the car are prone to failing and it sounds like what is happening to yours was what was happening to mine before I had my dealership replace them a few years ago.

09-14-2022, 12:26 PM	#1
legendary70 Drives: 2017 Camaro Join Date: Feb 2020 Location: TEXAS!! Posts: 349	Ac issue... My 2017 camaro. Every now amd then the ac won't cool. When I disconnect the negative terminal for about 5 minutes it works fine. Why is this happening? When it happens it won't cool amd after I turn the car off the fan on the engine stays on for a longtime. __________________

09-15-2022, 06:56 AM	#2
legendary70 Drives: 2017 Camaro Join Date: Feb 2020 Location: TEXAS!! Posts: 349	Anyone ever dealt with this? thx __________________

09-15-2022, 07:07 AM	#3
arpad_m Drives: 2018 Camaro 2SS A8 Join Date: Jul 2017 Location: East Tennessee Posts: 11,602 View My Garage	I'd check the thermostat, the A/C could be turned off and the engine fan running for a long time after key off because the ECM thinks the engine is overheating. __________________ 2018 Camaro 2SS — G7E MX0 NPP F55 IO6 735 rwhp \| 665 rwtq Magnuson TVS 2300 80mm pulley \| Kooks 1 7/8" LT headers \| JRE smooth idle terminator cam \| LT4 FS & injectors \| TSP forged pistons & rods JMS PowerMAX \| DSX flex fuel kit \| Roto-Fab CAI \| Soler 95mm LT5 TB \| 1LE wheels \| 1LE brakes \| BMR rear cradle lockout \| JRE custom tune 1100 - 1/30/18 \| 2000 - 1/31/18 3000 - 2/06/18 TPW 2/26/18 3400 - 2/19/18 \| 3800 - 2/26/18 4300 - 2/27/18 \| 4B00 - 3/01/18 4200 - 3/05/18 \| 4800 - 3/14/18 5000 - 3/16/18 \| 6000 - 3/19/18

09-15-2022, 07:28 AM	#4
95 imp Dumb Ass Deluxe Drives: A Tricked Out Mountain Bike Join Date: Jun 2019 Location: Arizona Posts: 1,959	No codes? __________________

09-15-2022, 10:58 AM	#6
legendary70 Drives: 2017 Camaro Join Date: Feb 2020 Location: TEXAS!! Posts: 349	No codes. No check engine. When the AC works it works great when stopped or moving. gauge is normal. not moving. __________________

09-15-2022, 09:39 AM	#5
ctrlz Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016 Location: Ocean City, NJ Posts: 3,178	Need more information. When the A/C works, does it work fine? Adequate cooling when the vehicle is moving as well as when it is stopped? Duct temps always cold on both passenger and driver side? What is coolant temperature gauge doing while driving or at standstill? Could be problems in two systems: engine cooling and A/C.

09-15-2022, 02:40 PM	#8
KirkH Drives: 2016 2SS M6 Mosaic Blk Met-SOLD Join Date: Jun 2016 Location: KY Posts: 2,934	On mine, it was the thermostat. Replacing the thermostat is one of the easiest DIYs on this car. I got an ACDelco at Autozone for $75 but I have a commercial account. Expect to pay $100. __________________ Official Detailer of CamaroFest 8 & 9 https://www.autogeekonline.net/forum...st-8-pics.html https://www.camaro6.com/forums/showt...=521655&page=1 https://www.camaro6.com/forums/showt...=547470&page=1 https://www.camaro6.com/forums/showthread.php?t=527474 No one on Earth has detailed more Camaros. http://KirkTheDetailer.com

09-16-2022, 04:32 PM	#9
legendary70 Drives: 2017 Camaro Join Date: Feb 2020 Location: TEXAS!! Posts: 349	K great. Temp seems normal. I will change it out. But would a thermostat cause the ac not to throw cold air? __________________

09-16-2022, 06:43 PM	#10
GXP08jrf Drives: 2016 1LT 'Vert Join Date: Feb 2022 Location: Midwest Posts: 171	Generally, Yes. A bad thermostat will eventually result in A/C shutting off. Because the condenser is forward of the radiator, the a/c will eventially turn off at a prescribed coolant temperature to reduce load both on the engine and cooling system. The air exiting the condenser is warmer and it takes several HP to spin the compressor.

09-20-2022, 04:56 AM	#12
STEVE41 Drives: 2016 SS Join Date: Jan 2016 Location: PHOENIX Posts: 156	your thermostat is bad, just replace it.

09-20-2022, 10:53 AM	#13
Odabo Drives: Chevrolet Blazer Join Date: Oct 2021 Location: Space Coast Posts: 242	IDK about the Camaro but years ago I had a similar situation on a Buick. Replaced the thermostat to no avail. Finally resolved the issue replacing a relay that controlled the AC. That was on a 1980s vehicle, therefore it may not apply here. __________________ 2023 2SS 1LE Radiant Red, A10, PDR, Black Lugs, ACS Rock Guards, ACS ZL1 1LE Side Skirts

09-22-2022, 04:30 PM	#14
Puddin Drives: 2016 Camaro 2SS Join Date: Apr 2018 Location: Central Texas Posts: 1,011	Yeah if your temps are normal it's not your thermostat. The actual temp sensors inside the car are prone to failing and it sounds like what is happening to yours was what was happening to mine before I had my dealership replace them a few years ago.

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