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)
Re: please help me with my air conditioning for my 1995...
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.
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The first I would do is check if the a/c compressor is working. Start vehicle then turn a/c on in vehicle full power and then off/on a couple of times if you hear a click when turned on then compressor is working properly.If this is the case then you need freon.If not turning on,first check fuses,for location refer to owners manual,if not fuse then compressor needs to be checked which then you will need service manual purchase at local autoparts store.
You may not be full of refrigerant... There is a low pressure switch that prevents the AC from actuating the clutch, and the reason is: IF there is not enough refrigerant, you will not be able to move oil through the system and you will have major damage...so no engauge...
Get the system checked, most likely there is a leak somewhere..
THE AIR CONDITIONING IN MY 2000 JETTA VR6 JUST STOPPED WORKING, NO WARNING. I HAD TWO DIFFERANT MECHANICS LOOK AT IT. THEY SAID THAT THE COMPRESSOR IS NOT GETTING ANY VOLTAGE, BUT WHEN THEY JUMP VOLTAGE TO THE COMPRESSOR IT STILL WILL NOT START. THEY SAID THE COMPRESSOR SEEMS TO BE OKAY. ANY SUGGESTIONS
make sure your plugs and wires are in good condition.also fuel and air filter.the engine has to be well tuned up.because air conditioner compressor put a little load on engine.if engine is not well tuned.the AC will pull it down.cause it to lose power and run rough.
the first check to perform is to see if the compressor is cutting on.... you should be able to hear the engine struggle a bit when the ac is first cut on, or watch the clutch (built into the compressor pulley) begin to spin when the AC is switched on. If it does cut on, likely causes include refrigerant leak or internal system failure. If the compressor is not cutting on, it is a control issue, and some electrical tests must be performed.
In addition to what emission wiz says, observe the speed of the fan when you turn on the a/c. some fans, when the are cold they run faster, then they get hot and slow down a lot. Also check that the small belt that drives the second propeller is ok. And for last, check that the front of the radiator is clear of any garbage, like a plastic bag that might have been cought in front of the condenser with the wind. If all this is working properly, there is nothing else that could be happening machanically to this a/c to stop it from cooling. look at the center of the pully of the compresor, make sure the entire thig is spining when clutch engages.