I have been having an intermittent problem with my 2003 Suburban AC for years now and really want to get this resolved. I do plan to keep it for a while, so don't mind to invest 1k to 1.5 k to get this working properly.
I am thinking of just replacing everything due to age of the vehicle and not being able to isolate the problem, plus I have a code for the air intake door actuator. This is a real pain to get to, so if I was to remove the dash to change the actuator, I would probably do the evaporator and heater core at the same time. I would rather not remove the dash, but I am not sure what position my air recirc door has failed, maybe it is open letting outside warm air into the mix.
The other thing I don't know is how much oil is in the system. I have had it serviced a few times and I think they usually add dye and/or oil when they do the service. Don't know what has been done before I got it at 66k miles.
So just replacing the compressor, accumulator and condensor, I would not know how much oil to put in without risking overfilling. Starting from new would give me an empty system.
I have replaced the fan clutch and the 2 Ambient temperature sensors with GM Original parts.
It works fine on most days less than 75 degrees, but will not blow super cold on warmer or humid days.
It seems like it comes in waves, where sometimes it blows cold, sometimes just cool, and sometimes warm.
The clutch is part of the problem. When it blows warm/hot, I can tap it to get it to engage. Could this explain a "cool" but not cold condition?
It would be nice to not have to open up the system if I don't have to, and just replace a clutch.
It has never been great since I got it and does not do well on hot days at idle. Changing the fan clutch did not help.
Alos do not get much improvement after getting it serviced, a little less clutch disengagement, but does not make it as cold as I feel it should be.
I am thinking of just replacing everything due to age of the vehicle and not being able to isolate the problem, plus I have a code for the air intake door actuator. This is a real pain to get to, so if I was to remove the dash to change the actuator, I would probably do the evaporator and heater core at the same time. I would rather not remove the dash, but I am not sure what position my air recirc door has failed, maybe it is open letting outside warm air into the mix.
The other thing I don't know is how much oil is in the system. I have had it serviced a few times and I think they usually add dye and/or oil when they do the service. Don't know what has been done before I got it at 66k miles.
So just replacing the compressor, accumulator and condensor, I would not know how much oil to put in without risking overfilling. Starting from new would give me an empty system.
I have replaced the fan clutch and the 2 Ambient temperature sensors with GM Original parts.
It works fine on most days less than 75 degrees, but will not blow super cold on warmer or humid days.
It seems like it comes in waves, where sometimes it blows cold, sometimes just cool, and sometimes warm.
The clutch is part of the problem. When it blows warm/hot, I can tap it to get it to engage. Could this explain a "cool" but not cold condition?
It would be nice to not have to open up the system if I don't have to, and just replace a clutch.
It has never been great since I got it and does not do well on hot days at idle. Changing the fan clutch did not help.
Alos do not get much improvement after getting it serviced, a little less clutch disengagement, but does not make it as cold as I feel it should be.