1982 A/C Question
Thread Starter
Instructor
Joined: Aug 2016
Posts: 188
Likes: 40
From: Rockaway NJ
1982 A/C Question
I finished charging my AC system after converting to 134a and replacing all the components except the evaporator. It appears to be working fine and putting out cold air. But I need some advice. My auxiliary fan is not running. So after searching everywhere (here, AIM, Service manual etc.) I cant find the answer.
Is the fan supposed to run when A/C is on?
I know the fan is ok by grounding the temp switch.
If it is supposed to run, is it controlled through the control head?
Thanks for any advice!
Is the fan supposed to run when A/C is on?
I know the fan is ok by grounding the temp switch.
If it is supposed to run, is it controlled through the control head?
Thanks for any advice!
Race Director
Joined: May 2006
Posts: 18,665
Likes: 2,564
found this link which seems to say it is by temperature, 238.
https://www.corvetteforum.com/forums...oling-fan.html
this is for an 81 and says the same thing 238
https://www.corvetteforum.com/forums...n-with-ac.html
https://www.corvetteforum.com/forums...oling-fan.html
this is for an 81 and says the same thing 238
https://www.corvetteforum.com/forums...n-with-ac.html
Last edited by MelWff; Jun 28, 2018 at 10:29 AM.
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
Knowing that on your 1982 you have a fan that turns all the time when the engine is running. On many of the A/C jobs I work on when It is being charged up and checked IF there is an electric fan like what you have and is not running due to the coolant temps are low and it is not on.
Sometimes I will by-pass it and get he fan to come on and my A/C guy and I can often times see if this added fan is allowing the pressures of the system to be not so much on the high side and it actually aids in pulling more air across the condenser.
Does that fan need to be on...no way in telling unless you knew what your high side pressures were at and if it was 'borderline'. Now keep in mind that going down the road will all of the air being forced through the condenser. The electric fan more than likely is NOT needed. It is when you are sitting still is when it will more than likely be a benefit because you might be able to actually feel the air temp change.. Granted this will depend if you are on MAX A/C or the NORM setting.
So..it is up to you if you want to incorporate it while the car is idling or not if you feel it is needed at all. Because it can be wired to do just that. A relay, a trigger switch at your throttle and some wires and time.
DUB
Sometimes I will by-pass it and get he fan to come on and my A/C guy and I can often times see if this added fan is allowing the pressures of the system to be not so much on the high side and it actually aids in pulling more air across the condenser.
Does that fan need to be on...no way in telling unless you knew what your high side pressures were at and if it was 'borderline'. Now keep in mind that going down the road will all of the air being forced through the condenser. The electric fan more than likely is NOT needed. It is when you are sitting still is when it will more than likely be a benefit because you might be able to actually feel the air temp change.. Granted this will depend if you are on MAX A/C or the NORM setting.
So..it is up to you if you want to incorporate it while the car is idling or not if you feel it is needed at all. Because it can be wired to do just that. A relay, a trigger switch at your throttle and some wires and time.
DUB
Thread Starter
Instructor
Joined: Aug 2016
Posts: 188
Likes: 40
From: Rockaway NJ
Knowing that on your 1982 you have a fan that turns all the time when the engine is running. On many of the A/C jobs I work on when It is being charged up and checked IF there is an electric fan like what you have and is not running due to the coolant temps are low and it is not on.
Sometimes I will by-pass it and get he fan to come on and my A/C guy and I can often times see if this added fan is allowing the pressures of the system to be not so much on the high side and it actually aids in pulling more air across the condenser.
Does that fan need to be on...no way in telling unless you knew what your high side pressures were at and if it was 'borderline'. Now keep in mind that going down the road will all of the air being forced through the condenser. The electric fan more than likely is NOT needed. It is when you are sitting still is when it will more than likely be a benefit because you might be able to actually feel the air temp change.. Granted this will depend if you are on MAX A/C or the NORM setting.
So..it is up to you if you want to incorporate it while the car is idling or not if you feel it is needed at all. Because it can be wired to do just that. A relay, a trigger switch at your throttle and some wires and time.
DUB
Sometimes I will by-pass it and get he fan to come on and my A/C guy and I can often times see if this added fan is allowing the pressures of the system to be not so much on the high side and it actually aids in pulling more air across the condenser.
Does that fan need to be on...no way in telling unless you knew what your high side pressures were at and if it was 'borderline'. Now keep in mind that going down the road will all of the air being forced through the condenser. The electric fan more than likely is NOT needed. It is when you are sitting still is when it will more than likely be a benefit because you might be able to actually feel the air temp change.. Granted this will depend if you are on MAX A/C or the NORM setting.
So..it is up to you if you want to incorporate it while the car is idling or not if you feel it is needed at all. Because it can be wired to do just that. A relay, a trigger switch at your throttle and some wires and time.
DUB
Thanks for the info Dub. My high side seems to max out at 175 on a 90 deg. day. So will leave the electric fan on the thermostat for now.
