AC was putting out the barest of cool air on full at night - could not
feel but hot air during the heat of the day. Added R134a and now it
works great. BUT - it seems the radiator/condenser fan up front runs as
long as the AC is turned on - and I think that is as it should be -or is
it? But this evening - while ambient temp was still quite warm, not far
from home I turned the AC off when stopping for a light (idle stabilizer
doesn't work so engine would stall otherwise) and when I turned it back
on - I noted that radiator/condensor fan didn't work - didn't turn on.
The AC continued to put out cold air - but now fan doesn't run - which
incidentally up to now sounds like a jet engine running.

Can anyone tell me about how this is supposed to work - and do I have
something wrong? Or am I fretting over nothing?

Thanks,

John