Hi all. I searched and searched, but could not find the right answer (not to mention when I search for "A/C" or "AC" no results show.)

My 1979 300TD n/a wagon has never, since I've had it, had a working A/C. Heat blows great, and blows well on A/C settings "hi" or "low" but nothing cold. Orig. owner mentioned the system needs to be recharged. If that is all that needs to happen, is there some way to confirm that it just needs to be recharged, short of just recharging it?

I also notice the following when I put the A/C "on". The fan blows well, but when I push the "on" button for the A/C, and hold it in, some other fan kicks in, but does not stay on when I am not holding down the "on" button. Is there something wrong with the switch? Or bigger problems?

I am trying to sell this wagon, but if I get the A/C working, may just hang on. Reason for selling - moving to very humid climate where A/C will be a necessity.

Thanks.

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1979 300TD wagon (non-turbo)
266,000+