ac issues
Thread Starter
Instructor
Joined: Feb 2008
Posts: 128
Likes: 0
ac issues
My 75 ac isn't working. Here's the symtems. It seems I have multiple problems:
The compressor only kicks on when the switch is set to vent or something like that. It doesn't when the ac is actually turned on. There is no cold air coming out the vents and not alot of air coming out at all. Could this be a switch issue? I can hear the fan blowing but not getting alot of air out the vents. Thanks
The compressor only kicks on when the switch is set to vent or something like that. It doesn't when the ac is actually turned on. There is no cold air coming out the vents and not alot of air coming out at all. Could this be a switch issue? I can hear the fan blowing but not getting alot of air out the vents. Thanks
Former Vendor
Joined: Apr 2009
Posts: 766
Likes: 3
From: Charlotte North Carolina 704-394-5150
You need to let me know if you can tell that the fan has ALL of its settings operational. Mainly the high setting. This is for starters.
You may not want to hear what I have to say, because it is common problem dealing with air flow and IS a PAIN to correct.
As for the compressor not kicking in until the control is set to "vent" may be in the a/c-heater control unit. Does the indicator go all the way to the top and also to the bottom? If not it may not be "clocked" correctly and need replacing or service, which is also a pain.
Please reply and let me (us) know what you have found.
"DUB"
You may not want to hear what I have to say, because it is common problem dealing with air flow and IS a PAIN to correct.
As for the compressor not kicking in until the control is set to "vent" may be in the a/c-heater control unit. Does the indicator go all the way to the top and also to the bottom? If not it may not be "clocked" correctly and need replacing or service, which is also a pain.
Please reply and let me (us) know what you have found.
"DUB"
Pro
Joined: Nov 2007
Posts: 710
Likes: 0
From: Northern Florida
My 75 ac isn't working. Here's the symtems. It seems I have multiple problems:
The compressor only kicks on when the switch is set to vent or something like that. It doesn't when the ac is actually turned on. There is no cold air coming out the vents and not alot of air coming out at all. Could this be a switch issue? I can hear the fan blowing but not getting alot of air out the vents. Thanks
The compressor only kicks on when the switch is set to vent or something like that. It doesn't when the ac is actually turned on. There is no cold air coming out the vents and not alot of air coming out at all. Could this be a switch issue? I can hear the fan blowing but not getting alot of air out the vents. Thanks
Team Owner
Joined: Jan 2007
Posts: 53,648
Likes: 878
From: Southern Cal Ca
St. Jude Donor '22
The roll controls get finicky.
They have vacuum ports and open and close mix door and heat,defrost and vent.
This is a valuable part and be careful.
Some cleaning and inspection can get it working again.
They have vacuum ports and open and close mix door and heat,defrost and vent.
This is a valuable part and be careful.
Some cleaning and inspection can get it working again.
Thread Starter
Instructor
Joined: Feb 2008
Posts: 128
Likes: 0
Sorry for the lack of info guys. I checked the hoses from the compressor and they are getting ice cold. I know the compressor is atleast working.
As for the switch.... I know there has to be some kind of problem because the compressor isnt kicking on until the unit is set to "level vent". AC setting does NOT kick the compressor on. If I order a new switch, does the 3 port vacuum valve come with it or do I also need to order that?
I should probably check all the hoses for leaks also
As for the switch.... I know there has to be some kind of problem because the compressor isnt kicking on until the unit is set to "level vent". AC setting does NOT kick the compressor on. If I order a new switch, does the 3 port vacuum valve come with it or do I also need to order that?
I should probably check all the hoses for leaks also
Melting Slicks
Joined: May 2000
Posts: 2,305
Likes: 5
From: Orlando,Fl,USA
When I took out my system on the 77 the Evaporator was 3/4 full of dirt & debri. It was rusted and leaking. The vac operated vent flaps were also rusted and stuck along the pass side that feed from the windshield wiper cowl area. After replacing the crappy A4 compressor 2 times and a blower fan I gave up and trashed the system for a sanden compressor Hot rod air system. Best thing I did. ($1,200.00).
Thread Starter
Instructor
Joined: Feb 2008
Posts: 128
Likes: 0
You need to let me know if you can tell that the fan has ALL of its settings operational. Mainly the high setting. This is for starters.
You may not want to hear what I have to say, because it is common problem dealing with air flow and IS a PAIN to correct.
As for the compressor not kicking in until the control is set to "vent" may be in the a/c-heater control unit. Does the indicator go all the way to the top and also to the bottom? If not it may not be "clocked" correctly and need replacing or service, which is also a pain.
Please reply and let me (us) know what you have found.
"DUB"
You may not want to hear what I have to say, because it is common problem dealing with air flow and IS a PAIN to correct.
As for the compressor not kicking in until the control is set to "vent" may be in the a/c-heater control unit. Does the indicator go all the way to the top and also to the bottom? If not it may not be "clocked" correctly and need replacing or service, which is also a pain.
Please reply and let me (us) know what you have found.
"DUB"
Pro
Joined: Nov 2007
Posts: 710
Likes: 0
From: Northern Florida
Sorry for the lack of info guys. I checked the hoses from the compressor and they are getting ice cold. I know the compressor is atleast working.
As for the switch.... I know there has to be some kind of problem because the compressor isnt kicking on until the unit is set to "level vent". AC setting does NOT kick the compressor on. If I order a new switch, does the 3 port vacuum valve come with it or do I also need to order that?
I should probably check all the hoses for leaks also
As for the switch.... I know there has to be some kind of problem because the compressor isnt kicking on until the unit is set to "level vent". AC setting does NOT kick the compressor on. If I order a new switch, does the 3 port vacuum valve come with it or do I also need to order that?
I should probably check all the hoses for leaks also
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
