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Hello. I recently got a 1988 corvette. Runs and drives smoothly. I had an air conditioning malfunction though and has been going on since I had it. Whenever i turn on the AC, it usually starts cold, but whenever I make a tight turn, it begins blowing hot. Sometimes when I turn on the AC it can be hot. Also randomly when driving, rarely, it’ll randomly go from cold to hot. Compressor works normally and kicks on, I checked the blend door actuator and it seems to be working as well. Recently did a retrofit to r134a and fixed an o ring leak, so it isn’t low on Freon either. Any advice? Desperate for help during this hot summer. Idk if this will help, but during the winter the heater also struggled to work much, but I don’t remember the specifics, just that it didn’t kick on much. Also when the AC blows hot , the compressor is still running so I’m not sure it’s a compressor issue or not. Help needed
Yes auto air climate control. The ambient temperature is accurate (96 but feels like 102) and fluctuates normally. Even when it begins blowing hot it stays normal, when I got home I turned on the AC and it was blowing hot and slowly cooled but not very cold. I am not sure about heater control valve in a 1988 either.
Hm. I cannot seem to find anything, theres no dripping under the car near the blower motor at all. Just near the main components like the accumulator which condensates and drips water
Last edited by C41988; Jun 26, 2024 at 12:22 PM.
Reason: Condensation
"On my car the drain is above the fuel filter. If you look at the evap housing the drain is on the engine side. There is about a one inch thin rubber tube sticking down out of the housing on the bottom. If you crack open the top of the housing and pour water in, you can test it that way. I found that pouring water in other places made a large pool of it under the blower motor."
this is the only tube like thing I could find under the Vette. Is this it? Above the fuel filter there is no tube or opening in sight.
this does look like it is connected to some other reservoir though.. please lmk I’m not sure
I found the evap drain. It’s a small hole instead of a tube above the fuel filter, and yes, it was pouring a bit while the AC is running, so it is not either of those
You said the blend door motor is working, but have you removed the fan resistor and looked at the blend door itself? It sounds like the rod is detached, and that's why it goes from cold to hot when you make a tight turn.
I just took a quick look at it and moved some wires aside and checked the blend door motor out. It looks like there’s nothing attached
looks like a little white nub attached to nothing. What do I do from this point on?
AC malfunctioning, please help
