I have a 1995 JGC and when I turn on the HVAC ATC no matter what position or mode is selected the snowflake is present to indicate that the A/C is engaged. I can turn the ATC temp knob to high and it still stays on until I press the A/C button then the snowflake disappears. This issue repeats everytime.

I have change the ATC control head with a new part and it seemed to vanish for awhile but now the issue is present again.

Anyone come across this issue?

Thanks in advance.