Question about 1995 Volkswagen Jetta

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Please help me with my air conditioning for my 1995 jetta

Ok, im having problems with the ac for my jetta. the ac works fine and i hear the compressor 'click', ac is blowing cold air after about a minute. then, as the engine starts to warm up, the cold air blowing starts to warm up as well. then eventually my ac starts to blow like a heater. i've taken it to the shop for a quick diagnostic, and they figured that no power was going to my compressor. they wired directly from the battery to the compressor and cold air came out. this test was done with the temp of the engine was normal. (niddle half way up)

anyone have any suggestions?

will check reply in a few later. thanks!

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  • Anonymous Mar 18, 2014

    AC not cooling, system blowing warm to hot air on lowest temp setting

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HI, giving the compressor 12v directly is not the way to go as you are bypassing the entire fail safe cercuit. it seem to me that your ac gas is low(can be checked via ac pressure gauges) wich means you have a system leak sumwhere. as soon as your hi/low pressure switch(depending on system) detect inferior pressure to the spesified pressure ,the ac compressor voltage is cut in order to protect the pump from seizure.

Or perhaps your evaporator(small radiator like unit behind dash) can get freezed up caused by either too mutch system gas(check pressure) or poor opperation of the expantion valve. the evaporator then has a sensor(themometer) wich measures evap. temp and if the value drops below spec (usially round about7degrees) the ac compressor will be cut once again(fail safe)

Maybe your ac compressor overheats due to inferior system oil/oil capasity, also note that only some systems incorperate the function of measuring ac pump temp. then again temp to high= fail safe=no12v to ac pump.

Good luck.
gk

Posted on Jul 19, 2008

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