CorvetteForum - Chevrolet Corvette Forum Discussion

Notices
C4 General Discussion General C4 Corvette Discussion not covered in Tech

'94 with AC issues

Thread Tools
 
Search this Thread
 
Old 04-23-2018, 07:36 PM
  #1  
BLUDICE
Drifting
Thread Starter
 
BLUDICE's Avatar
 
Member Since: Apr 2014
Location: Plainfield IN
Posts: 1,390
Received 128 Likes on 94 Posts
Default '94 with AC issues
Has freon, fuses are all good - compressor is working - - - BUT blowing out warm air - no codes!
HELP!
Last edited by BLUDICE; 04-23-2018 at 09:13 PM.
BLUDICE is offline  
Reply Like
Old 04-25-2018, 07:56 AM
  #2  
BLUDICE
Drifting
Thread Starter
 
BLUDICE's Avatar
 
Member Since: Apr 2014
Location: Plainfield IN
Posts: 1,390
Received 128 Likes on 94 Posts
Default
No one has any ideas??
BLUDICE is offline  
Reply Like
Old 04-25-2018, 08:54 AM
  #3  
ls777z
Burning Brakes
 
ls777z's Avatar
 
Member Since: Nov 2015
Location: Clay New York
Posts: 1,196
Received 315 Likes on 231 Posts
Default
Condenser maybe? I know you would probably prefer to not take it someplace but some thing's are beyond us mere mortals...
ls777z is offline  
Reply Like
The following users liked this post:
BLUDICE (04-25-2018)
Old 04-25-2018, 10:09 AM
  #4  
-=Jeff=-
Race Director
 
-=Jeff=-'s Avatar
 
Member Since: Mar 1999
Location: Bartlett Illinois
Posts: 12,324
Received 171 Likes on 148 Posts

Default
Assuming C68.. Have you done an A/C reset? disconnect battery for 30s.. reconnect, turn key to on (don't start) wait for the Blend door to self calibrate, then start, check to see if blows cold and Compressor kicks on
-=Jeff=- is offline  
Reply Like
The following users liked this post:
BLUDICE (04-25-2018)
Old 04-25-2018, 11:47 AM
  #5  
bac22
Le Mans Master
 
bac22's Avatar
 
Member Since: Feb 2000
Location: Epping NH
Posts: 8,210
Received 186 Likes on 163 Posts

Default
Confirm the clutch is actually working on the condenser, it's driven by the accessory belt...you can see it cycle on/off when cold air is called for.
bac22 is offline  
Reply Like
The following users liked this post:
BLUDICE (04-25-2018)
Old 04-25-2018, 12:51 PM
  #6  
BLUDICE
Drifting
Thread Starter
 
BLUDICE's Avatar
 
Member Since: Apr 2014
Location: Plainfield IN
Posts: 1,390
Received 128 Likes on 94 Posts
Default
Originally Posted by bac22
Confirm the clutch is actually working on the condenser, it's driven by the accessory belt...you can see it cycle on/off when cold air is called for.
yep clutch is working -
BLUDICE is offline  
Reply Like
Old 04-25-2018, 12:53 PM
  #7  
BLUDICE
Drifting
Thread Starter
 
BLUDICE's Avatar
 
Member Since: Apr 2014
Location: Plainfield IN
Posts: 1,390
Received 128 Likes on 94 Posts
Default
Originally Posted by -=Jeff=-
Assuming C68.. Have you done an A/C reset? disconnect battery for 30s.. reconnect, turn key to on (don't start) wait for the Blend door to self calibrate, then start, check to see if blows cold and Compressor kicks on
I did the battery disconnect last nite - but have not started the car yet - I'll do that tonite
BLUDICE is offline  
Reply Like
Old 04-25-2018, 12:58 PM
  #8  
-=Jeff=-
Race Director
 
-=Jeff=-'s Avatar
 
Member Since: Mar 1999
Location: Bartlett Illinois
Posts: 12,324
Received 171 Likes on 148 Posts

Default
how often does the clutch cycle on MAX AC?
-=Jeff=- is offline  
Reply Like
The following users liked this post:
BLUDICE (04-25-2018)
Old 04-25-2018, 07:21 PM
  #9  
BLUDICE
Drifting
Thread Starter
 
BLUDICE's Avatar
 
Member Since: Apr 2014
Location: Plainfield IN
Posts: 1,390
Received 128 Likes on 94 Posts
Default
Originally Posted by -=Jeff=-
how often does the clutch cycle on MAX AC?
Just a couple seconds - I'm concern - but we are in the 60's here - did blow some cool air when I started it - didn't have time to take it for a drive so -----
BLUDICE is offline  
Reply Like
Old 04-25-2018, 07:49 PM
  #10  
-=Jeff=-
Race Director
 
-=Jeff=-'s Avatar
 
Member Since: Mar 1999
Location: Bartlett Illinois
Posts: 12,324
Received 171 Likes on 148 Posts

Default
What settings did you have on the control unit when it was cycling
-=Jeff=- is offline  
Reply Like
Old 04-25-2018, 08:16 PM
  #11  
BLUDICE
Drifting
Thread Starter
 
BLUDICE's Avatar
 
Member Since: Apr 2014
Location: Plainfield IN
Posts: 1,390
Received 128 Likes on 94 Posts
Default
Originally Posted by -=Jeff=-
What settings did you have on the control unit when it was cycling
auto w/ temp @ 60 degree - fan @ 10
BLUDICE is offline  
Reply Like
Old 04-25-2018, 08:57 PM
  #12  
-=Jeff=-
Race Director
 
-=Jeff=-'s Avatar
 
Member Since: Mar 1999
Location: Bartlett Illinois
Posts: 12,324
Received 171 Likes on 148 Posts

Default
In auto mode (recirculated) 60 deg, it should not cycle much if at all. If it is just on for 2seconds you are low on refrigerant
Last edited by -=Jeff=-; 04-25-2018 at 08:57 PM.
-=Jeff=- is offline  
Reply Like
The following users liked this post:
BLUDICE (04-25-2018)
Old 04-30-2018, 02:18 AM
  #13  
corvette95
Melting Slicks
 
corvette95's Avatar
 
Member Since: Jul 1999
Location: Decatur, Alabama
Posts: 3,212
Received 97 Likes on 83 Posts

Default
Originally Posted by BLUDICE
Has freon, fuses are all good - compressor is working - - - BUT blowing out warm air - no codes!
HELP!
Manual a/c or C68. Blend door motor stuck? Remove the 3 7mm screws with hood open and have assistant move a/c from 60 to 90 and verify you see the blend door move. If not you must can spray some wd40 or similar in the entire area with the movable door and wait a few hours. You can gently try to pry it waiting doesnt work. After that , could be actual blend door motor or heater box. With motor /ignition off you can gently move the motor by hand. See you FSM if needed
corvette95 is offline  
Reply Like
The following users liked this post:
BLUDICE (05-01-2018)
Old 04-30-2018, 02:52 AM
  #14  
ETM
Melting Slicks
 
ETM's Avatar
 
Member Since: May 2005
Location: Folsom Ca
Posts: 2,152
Received 33 Likes on 33 Posts

Default
I had similar symptoms and it turned out to be two hose that were leaking pretty bad.
ETM is offline  
Reply Like
Old 04-30-2018, 10:16 AM
  #15  
Silver85
Burning Brakes
 
Silver85's Avatar
 
Member Since: Nov 2016
Location: Buchanan GA
Posts: 760
Received 79 Likes on 75 Posts
Default
Originally Posted by -=Jeff=-
In auto mode (recirculated) 60 deg, it should not cycle much if at all. If it is just on for 2seconds you are low on refrigerant
+1 A set of gauges would come in handy here. Low refrigerant charge or a restriction in the circuit can cause short cycling.
Last edited by Silver85; 04-30-2018 at 10:16 AM.
Silver85 is offline  
Reply Like
The following users liked this post:
BLUDICE (05-01-2018)
Old 05-01-2018, 06:49 PM
  #16  
BLUDICE
Drifting
Thread Starter
 
BLUDICE's Avatar
 
Member Since: Apr 2014
Location: Plainfield IN
Posts: 1,390
Received 128 Likes on 94 Posts
Default
Heat works fine - after sitting a few days it blows cool air - gradually gets warmer.
BLUDICE is offline  
Reply Like
Old 05-01-2018, 06:52 PM
  #17  
BLUDICE
Drifting
Thread Starter
 
BLUDICE's Avatar
 
Member Since: Apr 2014
Location: Plainfield IN
Posts: 1,390
Received 128 Likes on 94 Posts
Default
I've added some Freon - compressor still short cycling
BLUDICE is offline  
Reply Like

Get notified of new replies

To '94 with AC issues

Old 05-04-2018, 11:26 AM
  #18  
Silver85
Burning Brakes
 
Silver85's Avatar
 
Member Since: Nov 2016
Location: Buchanan GA
Posts: 760
Received 79 Likes on 75 Posts
Default
Originally Posted by BLUDICE
I've added some Freon - compressor still short cycling
How much did you add? Did it improve at all or stay the same?
Silver85 is offline  
Reply Like
The following users liked this post:
BLUDICE (05-04-2018)
Old 05-04-2018, 11:35 AM
  #19  
-=Jeff=-
Race Director
 
-=Jeff=-'s Avatar
 
Member Since: Mar 1999
Location: Bartlett Illinois
Posts: 12,324
Received 171 Likes on 148 Posts

Default
What are your gauge readings?
-=Jeff=- is offline  
Reply Like
The following users liked this post:
BLUDICE (05-04-2018)
Old 05-04-2018, 04:16 PM
  #20  
BLUDICE
Drifting
Thread Starter
 
BLUDICE's Avatar
 
Member Since: Apr 2014
Location: Plainfield IN
Posts: 1,390
Received 128 Likes on 94 Posts
Default
Originally Posted by Silver85
How much did you add? Did it improve at all or stay the same?
A DIY can of Freon - no change at all
BLUDICE is offline  
Reply Like



Click for Advanced Search
Quick Reply: '94 with AC issues


Reply Closed Thread Share
Forum Jump
Trending Topics

All times are GMT -4. The time now is 02:18 AM.