AC Not Blowing Cold - ZR-1 Net Registry Forums

TealZR1 · 06-11-2018

Hello Everyone, my 91 decided to stop blowing cold yesterday when I needed it here in the ATL. Last time I used it, blew cold all summer last year.
I saw in a post where it was suggested to disconnect the negative battery cable for 10 minutes to reset the ac components. I did that and it now blows cold (for now anyways). My question is:
Should I be looking for something else as to why it stopped blowing cold in the first place? At least I know it has R12 freon (and not getting a code)
Thanks for you help in advance!

-=Jeff=- · 06-11-2018

I always thought something in the C68 Controller caused that to happen. when I had my 89 (with 91 dash) this happened when I needed it to work. I am sort of happy the AC in my ZR-1 is the C60, for that reason

jss06c6 · 06-13-2018

When you disconnected the battery, it erased the stored fault code. If it happens againain, push both the up and down fan speed buttons and hold them down until the display shows -00.. then press the fan button to recoverer the error code. I'm betting you will get a -09, low freon..

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TX '90 ZR1 · 06-14-2018

Quote:

Originally Posted by jss06c6

When you disconnected the battery, it erased the stored fault code. If it happens againain, push both the up and down fan speed buttons and hold them down until the display shows -00.. then press the fan button to recoverer the error code. I'm betting you will get a -09, low freon..

Sent from my XT1585 using ZR-1 Net Registry mobile app

I agree this is the most likely scenario. Had the same happen. Found a small leak at the high side schrader valve.
Check the pressures and bring them up to spec if you get the code 9. Sniff it for leaks. Depending on ambient temp, if you are running on the low side you could have the system shut down and get the code.

TealZR1 · 06-14-2018

Thanks guys for the input on my AC situation. Worked ok again yesterday so hope it is isolated. My understanding is it is best for the AC if you use once in a while rather than not - I went over a year before I turned it on last week as I always drive it on nice days and without the t-tops. But it does get rather warm here in GA! Thanks Again!

XfireZ51 · 06-14-2018

Quote:

Originally Posted by TealZR1

Thanks guys for the input on my AC situation. Worked ok again yesterday so hope it is isolated. My understanding is it is best for the AC if you use once in a while rather than not - I went over a year before I turned it on last week as I always drive it on nice days and without the t-tops. But it does get rather warm here in GA! Thanks Again!

Don't be surprised if you pull the plenum to find your compressor electrical connectors cracked possibly causing intermittent conditions.

32valvZ · 06-16-2018

Not to hi jack... but Im having a similar issue. I pulled the battery cable.. still not cold. Check codes... there are none... stays on -00 The green light does not flash. It blows warm air in all modes.... what should I look at next?

TealZR1 · 06-16-2018

Thanks for all the reply posts on my ac problem - it is low freon and when I disconnect the negative battery post it only erases the 9 code it pulls. From a suggestion, I pressed the up/down buttons on the dash(same time) and than the fan button in the middle - a 9 code appears.
Now back to fixing the low freon problem and why it leaked. Will use suggestions posted. Thanks again!

-=Jeff=- · 06-16-2018

Marc H. Also suggests checking the high side schrader valve those are another source of a leak

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06-11-2018	#1
TealZR1 Join Date: Oct 2016 Location: Atlanta GA Posts: 51	AC Not Blowing Cold Hello Everyone, my 91 decided to stop blowing cold yesterday when I needed it here in the ATL. Last time I used it, blew cold all summer last year. I saw in a post where it was suggested to disconnect the negative battery cable for 10 minutes to reset the ac components. I did that and it now blows cold (for now anyways). My question is: Should I be looking for something else as to why it stopped blowing cold in the first place? At least I know it has R12 freon (and not getting a code) Thanks for you help in advance!

06-11-2018	#2
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,169	Re: AC Not Blowing Cold I always thought something in the C68 Controller caused that to happen. when I had my 89 (with 91 dash) this happened when I needed it to work. I am sort of happy the AC in my ZR-1 is the C60, for that reason __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

06-13-2018	#3
jss06c6 Join Date: Aug 2015 Location: Magnolia, Texas Posts: 884	Re: AC Not Blowing Cold When you disconnected the battery, it erased the stored fault code. If it happens againain, push both the up and down fan speed buttons and hold them down until the display shows -00.. then press the fan button to recoverer the error code. I'm betting you will get a -09, low freon.. Sent from my XT1585 using ZR-1 Net Registry mobile app

06-14-2018	#5
TealZR1 Join Date: Oct 2016 Location: Atlanta GA Posts: 51	Re: AC Not Blowing Cold Thanks guys for the input on my AC situation. Worked ok again yesterday so hope it is isolated. My understanding is it is best for the AC if you use once in a while rather than not - I went over a year before I turned it on last week as I always drive it on nice days and without the t-tops. But it does get rather warm here in GA! Thanks Again!

06-16-2018	#7
32valvZ Join Date: Nov 2007 Location: Sunshine State Posts: 1,071	Re: AC Not Blowing Cold Not to hi jack... but Im having a similar issue. I pulled the battery cable.. still not cold. Check codes... there are none... stays on -00 The green light does not flash. It blows warm air in all modes.... what should I look at next? __________________ [B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B]

06-16-2018	#8
TealZR1 Join Date: Oct 2016 Location: Atlanta GA Posts: 51	Re: AC Not Blowing Cold Thanks for all the reply posts on my ac problem - it is low freon and when I disconnect the negative battery post it only erases the 9 code it pulls. From a suggestion, I pressed the up/down buttons on the dash(same time) and than the fan button in the middle - a 9 code appears. Now back to fixing the low freon problem and why it leaked. Will use suggestions posted. Thanks again!

06-16-2018	#9
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,169	Re: AC Not Blowing Cold Marc H. Also suggests checking the high side schrader valve those are another source of a leak Sent from my iPhone using ZR-1 Net Registry __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978