My 1990 air conditioner is flashing when I first start the car.
Has anyone had this happen? If so how do you fix or adjust?

Thanks

 

When you say flashing, I take it you have a sight glass on it?

 

Reading between the lines, I think you mean the LED on Climate Control Panel on the dash is flashing.

If so, this means an air conditioning system fault has been detected and a code has been stored in the module.

Page 1C1-2 of the 1990 Service Manual covers the retrevial of the codes.

To do this, push and hold the fan up and down arrows at the same time for about 5-6 seconds. The LCD will show "-00". Push "Auto" and the LCD will show any fault codes that are stored.

While in the diagnostic mode, it is possible to show a number of other system parameters also, but the one you want is "-00".

Fault Codes

00 Not used
01 Temp. Door Motor Circuit Fault
02 Temp. Door Motor Circuit Fault
03 Ambient Sensor Open
04 Ambient Sensor Short
05 In-Car Temp Sensor Open
06 In-Car Temp Sensor Short
07 Solar Load Sensor Open
08 Solar Load Sensor Short
09 Low Freon Detected
10 UART Failure

 

Great feedback, I appreciate it

 

Check the owners manual also, I have done this and it works; pull fuses #1 and #17 wait 20-30 seconds then replace and start the car, should
clear. When it did not clear I was low on freon. Hope this helps.