The air conditioning does not work on my 1999 VW Beetle. I just bought the car. How can I determine why the AC doesn't work? Thanks.

AC systems are pretty complicated. If you don't have the proper gauges to do a diagnostic, you can't fix it yourself. Take it to a shop that specializes in AC work

Old new beetle VW harness has contact resistance problems(vibration of wires) and needs to be recrimped the long wires(vibration can be stopped by silicone rubber anchoring). Cold weather make battery voltages low and needs recharged with handbrake on(headlamps off) 10 minutes warming engine up the whole winter.

If you are talking about the belt for the ac compressor, yes the heater should still work.
If the blower is not working, you will need to have the blower motor checked for voltage and ground.

speed up engine with air on and see if compressor turns off. if it does then it is low pressure. if it has electric radiator fans they should be on when the ac is on. if they dont work then it will make the pressure higher

without putting my machine on it and extracting the gas to see how much gas their is by weight then i couldnt even think of a reason for this sorry

For troubleshooting Ac clutch not kicking in.Click this link below. http://technoanswers.blogspot.com/2011/06/2001-volkswagen-beetle-ac-clutch-will.html ----------- This should help.Thanks.Helpmech.

its probably the compressor that has died pricing depends on where you get it from

I have a friend with a 1999 Beetle. The Window was a pain, ended up taking it a shop. 285 at $90 per hour labor, saved an hour because I had taken apart the door.

AC not working at all? Likley the AC Controller (475) or the blower motor regulator (225).

Wiring is also bad in the one your looking at likely. And wiring jobs are a pain.

It will need a new timing belt at 90K for 600-800. DIY will run you 200.

I am fairly competent with car repair and can usually fix most things myself, but I trust others with wiring issues and computer issues.

Skip that car.

if its work in only low speed u have to replace the blower motor resstor which located close to the blower
let me know have a good one

See if these help:

With AC

Without AC

Indagate