I have a 1985 gold vette 92K on it, with a clear Blue top, love the car . I believe I have an issue with AC control damper. I can only run the AC on High Fan and Max. I have to control the temp buy siding the temp from cold to warm. When the Fan is set high or less and not on max but on normal after 30 mins or so the damper closes and very little air comes out of the defrost and floor vents nothing out of the main vents and the blower is running. I have to turn the system off and wait for about 10 min, and run the system on max and high fan. Not sure if the vacuum control pod is located in the dash, I did check the canister under the hood. Please help