A/C went goofy? - ZR-1 Net Registry Forums

Racinfan83 · 05-10-2014

This car is really starting to frustrate the he!! out of me...
Drove it two hours away to a show. Got runner up. About 20 miles from home the A/C quit blowing cold. I looked down and the display showed the outside temp was 24degrees. It was really like 86. Then the HEAT kicked on. So I shut the thing off. Little bit later the outside temp display climbed right back up to 87. Turned the A/C back on. Blew hot as he!! the rest of the way home. Opened hood when I got home and low pressure line was cold, compressor is cycling normally, still blows hot. I had a dealer convert it to R-134 last summer and it has been pretty much fine since - except it isn't as cold when sitting in traffic - better when moving but I figured that was kinda normal. Haibeck cleaned the radiator when I had it up there, and his chip is in it so car does not run hot. 200 Max. So now I got air that don't work, I think the front end is toed out, can't find the frickin "SES" light, and still have a vibration I have spent $1000 trying to fix that isn't.... Getting old in a hurry..

Kevin · 05-10-2014

Welcome to the club mate. Wish I could help more then pulling up a chair and joing you in the pain

Racinfan83 · 05-10-2014

Yeah I know. Figured I'd make it a "catch-all" pain thread...

garyhugo · 05-10-2014

I have a thought for you. Disconnect the battery and after a few minutes re connect it. When you do you should hear the air flow door cycle fully from closed to open (or vice versa). This resets the door. Now see if it will send the cold air into the cabin. As for the outside temp sensor that is something different. Not sure where that is located.

Schrade · 05-10-2014

Sounds like the controller module; if it has one...

Plastic gear cracks, and it can't calibrate; sticks at pegged on one end.

Racinfan83 · 05-11-2014

Any idea where that is at? Or the temp sensor?

Schrade · 05-11-2014

I don't know for sure that the Z does have a controller module there RF; the symptoms you describe are identical to my '98 GMC that had a bad one, with a cracked gear in it... It was in the ... dash

I opened it, spun the gear 180', and got 4 more years out of it - same problem with the Z headlight motor.

-=Jeff=- · 05-11-2014

Schrade, are you referring to the blend door? If so it is in the dash.

Racin', try battery disconnect first. I have found it helps fix the auto a/c at times

Racinfan83 · 05-11-2014

I looked at some of the "solutions" and like the PP said the battery unhooking may cure it. Think I will try that one first and go from there. I also found a link for getting codes from the A/C control panel - so that will be next after the reset ..
I would just like to be able to say just once that this car is all fixed and I drove it with no issues... Its bad when I have a LIST of stuff to fix

Schrade · 05-11-2014

Quote:

Originally Posted by -=Jeff=-

Schrade, are you referring to the blend door? If so it is in the dash.

Racin', try battery disconnect first. I have found it helps fix the auto a/c at times

Yeah Jeff - CONTROLLER for the blend door, but again, I don't know that the Z's HAVE an identical controller module...

RF - I got FSM AC flow chart scanned in one of my 'mega' threads here.

05-10-2014	#1
Racinfan83 Join Date: Apr 2013 Location: Eastern Missouri Posts: 773	A/C went goofy? This car is really starting to frustrate the he!! out of me... Drove it two hours away to a show. Got runner up. About 20 miles from home the A/C quit blowing cold. I looked down and the display showed the outside temp was 24degrees. It was really like 86. Then the HEAT kicked on. So I shut the thing off. Little bit later the outside temp display climbed right back up to 87. Turned the A/C back on. Blew hot as he!! the rest of the way home. Opened hood when I got home and low pressure line was cold, compressor is cycling normally, still blows hot. I had a dealer convert it to R-134 last summer and it has been pretty much fine since - except it isn't as cold when sitting in traffic - better when moving but I figured that was kinda normal. Haibeck cleaned the radiator when I had it up there, and his chip is in it so car does not run hot. 200 Max. So now I got air that don't work, I think the front end is toed out, can't find the frickin "SES" light, and still have a vibration I have spent $1000 trying to fix that isn't.... Getting old in a hurry.. __________________ [LEFT][SIGPIC][/SIGPIC][/LEFT] [CENTER][COLOR=Indigo][SIZE=4][I][B] Now Sold 1990 ZR-1 #2093, Black on Black..[/B][/I][/SIZE][/COLOR][/CENTER]

05-10-2014	#2
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,632	Re: A/C went goofy? Welcome to the club mate. Wish I could help more then pulling up a chair and joing you in the pain __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

05-10-2014	#3
Racinfan83 Join Date: Apr 2013 Location: Eastern Missouri Posts: 773	Re: A/C went goofy? Yeah I know. Figured I'd make it a "catch-all" pain thread... __________________ [LEFT][SIGPIC][/SIGPIC][/LEFT] [CENTER][COLOR=Indigo][SIZE=4][I][B] Now Sold 1990 ZR-1 #2093, Black on Black..[/B][/I][/SIZE][/COLOR][/CENTER]

05-10-2014	#4
garyhugo Join Date: Feb 2010 Location: Jacksonville,FL Posts: 242	Re: A/C went goofy? I have a thought for you. Disconnect the battery and after a few minutes re connect it. When you do you should hear the air flow door cycle fully from closed to open (or vice versa). This resets the door. Now see if it will send the cold air into the cabin. As for the outside temp sensor that is something different. Not sure where that is located. __________________ Gary 90-1572

05-10-2014	#5
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Re: A/C went goofy? Sounds like the controller module; if it has one... Plastic gear cracks, and it can't calibrate; sticks at pegged on one end. __________________ I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG]

05-11-2014	#6
Racinfan83 Join Date: Apr 2013 Location: Eastern Missouri Posts: 773	Re: A/C went goofy? Any idea where that is at? Or the temp sensor? __________________ [LEFT][SIGPIC][/SIGPIC][/LEFT] [CENTER][COLOR=Indigo][SIZE=4][I][B] Now Sold 1990 ZR-1 #2093, Black on Black..[/B][/I][/SIZE][/COLOR][/CENTER]

05-11-2014	#7
Schrade Join Date: Dec 2012 Location: NC Posts: 1,786	Re: A/C went goofy? I don't know for sure that the Z does have a controller module there RF; the symptoms you describe are identical to my '98 GMC that had a bad one, with a cracked gear in it... It was in the ... dash I opened it, spun the gear 180', and got 4 more years out of it - same problem with the Z headlight motor. __________________ I'm getting my snappics / threads removed blindly as fast as I can, to get in compliance with copyright / license TOS on the boards here (lots of FSM pages and other copyright / license violations on my part; sorry guys). And thanks to all the guys who didn't whine when I posted those FSM copyrighted / licensed stuff in my threads... ( :thumbsup: [b]and to think I complied with a mod's request to delete a pic of him in a Challenge Car in NCM Museum, so he wouldn't get in hot water)[/b] Thanks to several guys here for sending parts FREE; BearlyFlying, WeGone, Geezer, GoldCylon, and more there, TonyD, mike100, fletchusmc... 1990 #2794; 4L60e Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless, Power Effects 3" [IMG]https://lh5.googleusercontent.com/-GHpfzty7DVU/UQn-0Ru2xAI/AAAAAAAAA14/08mz1p4QLD4/s445/Screenshot-5.png[/IMG]

05-11-2014	#8
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,169	Re: A/C went goofy? Schrade, are you referring to the blend door? If so it is in the dash. Racin', try battery disconnect first. I have found it helps fix the auto a/c at times __________________ 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

05-11-2014	#9
Racinfan83 Join Date: Apr 2013 Location: Eastern Missouri Posts: 773	Re: A/C went goofy? I looked at some of the "solutions" and like the PP said the battery unhooking may cure it. Think I will try that one first and go from there. I also found a link for getting codes from the A/C control panel - so that will be next after the reset .. I would just like to be able to say just once that this car is all fixed and I drove it with no issues... Its bad when I have a LIST of stuff to fix __________________ [LEFT][SIGPIC][/SIGPIC][/LEFT] [CENTER][COLOR=Indigo][SIZE=4][I][B] Now Sold 1990 ZR-1 #2093, Black on Black..[/B][/I][/SIZE][/COLOR][/CENTER]