Question about 1996 Volkswagen Jetta

2 Answers

Please help me have AC

AC blowing hot - I bought a new compressor which cost an arm and a leg, that didn't help. I bought the AC relay, that didn't help. Recharged system - that didn't help. The car does not idle different when the ac button is on or off. I have no idea what else it could be. I really want to try all solutions before paying the local VW dealer 100 an hour to tell me something simple.

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  • tanar Jul 28, 2008

    I replaced the whole compressor, is the coil separate from the compressor/clutch? We did not check the voltage to the compressor clutch, what does that signal? Does it make a difference if it is higher or lower than 12 volts?

  • projeff Aug 06, 2008

    I have a similar problem-there are no leaks in the system and the pressures on both sides look good while running. compressor comes on but inside air still hot. The system is full. I experienced while driving on the ihghway with it on it started to cool then got cold like it should. I have a 26 mile drive and at first AC is not good it gets a little better but not pure cold. could there be a clog? I have replaced Compressor with used one known good and a new expansion valve. high side 100 psi low side 30.


  • raakpatel Aug 24, 2008

    I had the same problem. You need to see if you are getting power to the Compresser. If not you have an electrical problem and need to trace the problem. I found a issue with a wire on mine. I own a repair shop and tried all only to find out that it was a wiring issue.

  • yadayada
    yadayada May 11, 2010

    1st, is there 12 volts to the compressor clutch? did you replace the clutch coil?



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I had the same problem with my 96 jetta, no freon leaks, when I push the ac button on (with the fan switch on), the ac electrical clutch engages compressor is turning, system is fully charged. It was compressor failure, you need to replace the compressor, and everything down the line cause it is contaminated with debris from your compressor.
You need an expansion valve, drier/ accumulator, and seal kit(o-rings an so forth), should cost between $400-$500 range.
You also need to clean your lines of debris.
One shop was going to charge $1,100 this includes parts, freon and labor, you can save $500+ to do it yourself.

Posted on Aug 25, 2008

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Posted on Jul 28, 2008


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1 Answer

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A/C is blowing hot air. Freon is full, compressor

Not sure how you know if the freon is full without the unit running. There are a number of switches which can keep your A/C from coming on. There is a low pressure switch which is usually located on the larger line and sometimes located on a silver cannister (called an accumulator) which is the low side of a compressor circuit. There is also a high pressure cutout which is usually located on the back of the compressor unit. Both of these switches can be jumpered out to see if they are the reason for the compressor not working. You remove the two wire connector to either switch and place a small jumper wire between the two wires on the connector block. The other reason my be a low idle cutout switch and this will also usually be located near on on the compressor. You can also test it the same way as the other switches. If it is the low pressure switch then of course you will need to add freon which you can purchase from any auto parts store. They usually come with instructions and all the equipment needed to add in freon. If it is high pressure, then some of the freon should be recovered from the system by a technician. If is the low idle cutout then you will have to take it to a mechanic to understand why it is idling so low. Hope this helps.

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1 Answer

Ac blows cool than hot seems like a confused system

as it is a general motors product i beleive the relay is right on the compressor. check fuses and any other relays


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