AC compressor not running

I am new to the 928. I have 1986.5 with 67,000 on the clock. P.O. said AC had small leak and I needed to just add some Freon. This is a R12 system and I have a 20 lb. of R12 left over from other events. I tried to add some Freon with no luck. Compressor would not turn on nor would the fan on the condenser come on. All fuses are good and fan in dash will blow just fine. What am I overlooking?
It is starting to get warm here in North Carolina and will need some cooling in a few weeks.

Walt

Well, just a bottle of R12 may not have enough pressure to add to the system.
That said, I would think that if it was low enough it would take some.

A R12 recharge station heats the R12 to increase the pressure
I found an old one and bought it.
You do not want to heat the bottle!, let me be very clear on that
Maybe someone will pipe up on how to short the compressor, I don't have a picture of the switch.
You know, you should check the fuses for the AC, that could be one reason it does not kick in.

Common problem, there are a few good A/C guys here that will pipe in...me? I had someone do it... Turned out the compressor was fine just needed a new belt. Has been running ever since with stock 83 parts otherwise.

Several possibilities for the problem.

A 928 owner is required by Federal and State law to own a 12-volt test light, so take your test light and check for power on the connector located on the single black wire that runs next to the oil dipstick. With the ignition switch on, ac switch pushed in, bottom lever on one of the middle positions, and the blower switch on, there should be power at the connector. There should be a loud click from the compressor clutch when you set the controls as above. If not, then put the bottom lever on DEFROST (all other switches on as above) and see if you get the click or if there is power at the connector.

The electric cooling fan on your car comes on only when the refrigerant is hot or the coolant is hot.

Go to the 928 Specialists website at www.928gt.com , go to the tips and links on the left, find Wally's World, find the HVAC paper there. It has a lot of info about how the HVAC system works on the 928. Lots of reading, but your life will be easier and cheaper if you read and understand the info.

Wally is the man on this....and most other things as well....listen to him!

wallyp;14798 wrote: Several possibilities for the problem.

A 928 owner is required by Federal and State law to own a 12-volt test light, so take your test light and check for power on the connector located on the single black wire that runs next to the oil dipstick. With the ignition switch on, ac switch pushed in, bottom lever on one of the middle positions, and the blower switch on, there should be power at the connector. There should be a loud click from the compressor clutch when you set the controls as above. If not, then put the bottom lever on DEFROST (all other switches on as above) and see if you get the click or if there is power at the connector.

The electric cooling fan on your car comes on only when the refrigerant is hot or the coolant is hot.

Go to the 928 Specialists website at www.928gt.com , go to the tips and links on the left, find Wally's World, find the HVAC paper there. It has a lot of info about how the HVAC system works on the 928. Lots of reading, but your life will be easier and cheaper if you read and understand the info.

Went to this site did not see the tips and links on the left.

Walt