I have a 1984 mustang gt and the air just started
blowing hot air. No other problems just hit and I
tried recharging it but it's full.
what is the gauge reading ?
Is the clutch engaging?
I don't remember I did it awhile ago and yes it was engaged
If clutch is engaging and not clicking on and off sounds like the orfice tube filter is clogged this is a filter that is in the high side line ( small line ) of A.C system. A special tool is needed to separate line and a pair of needle nose pliers is needed to remove filter from inside line.
You will need to check the pressure first, if its really high then it could be a clog, but you need to get a set of gauges on the system...
I'll let you know what happens, thanks
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