Most Likely refrigerant charge is low -- compressor will not engage unless system has proper pressure
Where would I finf the relay switch on a 96 Grand Am?.
your switch that controls the compresser might be bad.
Denso
The ac pressure cycling switch is designed to engage or dissengage the clutch to keep the proper pressure in the system.
I have a 2002 Jeep Grand Cherokee Laredo that was doing the same thing. The problem was a faulty ac/heater switch. You put the switch on ac, compresser engages, lines get cold and frosty, but only hot air is coming out of the vents, because the switch has changed back to heater even though it shows ac. The cure is to have the center panel which contains the ac/heater switch, fan speed switch and temperature control replaced.
Have a AC shop test the AC system pressure
YES. It only has 1 A/C compresser.
at the compresser
well on my 86 it is located on the pump its self driverside down twords the bottom below the AC compresser if you got AC
sounds like he bypassed the switch for the low refrigerant shutoff , check freon level
most auto AC compressers have an electric clutch. it is powered by a single wire running out of the compresser; disconnect this wire to turn off the compresser. most cars are set up to run the ac comp. even when nothing but the heater is on. this is done to keep the comp in working order year-round. patricklaw1957@yahoo.com
You most likely have a bad a/c - heater controller........