92 volvo 740

[ch320725]

My air conditioning has been blowing hot. I took it to a mechanic and
they said the switch was off? Now it doesn't work again. Could it be
the temperature gauge, compressor? possibly a loose belt? anyone know?

 

[James Sweet]

My air conditioning has been blowing hot. I took it to a mechanic and
they said the switch was off? Now it doesn't work again. Could it be
the temperature gauge, compressor? possibly a loose belt? anyone know?

What switch?

It could be a low charge, bad pressostat, bad switch, bad compressor clutch,
you'll need to do some diagnosis, if that's beyond your skill level then you
may as well just take it to a mechanic.