Question about 2002 Mercury Sable
As compressor pulley barely turns it as is turned on or off makes no difference. Went to recharge the cold air to find out that it was filled pazt the point of safety on the pro Air guage.....so I vented the entire thing until empty and then charged with a can of Freon which at the end of course nothing changex..still no cold air......fixing serpentine belt this am.how to i find out if the noise is caused by the compressor itself,or a bearing in the pully
I can contribute a little to this but there are a few things that you have done that maybe you did not understand. Not saying this is not salvageable but there are procedures.
With the serpetine belt off, you can turn the compressor electric clutch. Without power the clutch is suppose to free wheel on bearings until electric is allowed to flow to the clutch and lock or engage it to drive the compressor. You should feel roughness in the compressor clutch if its bearings are bad. Most remove with left handed threads but sometimes rust to the compressor shaft.
If you can lock the electric clutch(may not be 12 volt) you can manually turn the compressor to feel roughness. Be aware that compressors take oil and each maker uses different oil weights.
Next, you need to borrow a vacuum machine to empty the system and since moisture will turn to ice, it needs to have negative vacuum pressure.
When you refill the system you found out that too little or too much Freon will not work. You look for the a/c label on the car and it will show the ozs. you need. A postal type scale can help.
While you have the serpetine belt off, check the other pulleys for roughness. Hope this helps. A compressor leaking oil will bring noise and burn out bearings. Hope this helps.
Posted on Sep 06, 2018
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Posted on Jan 02, 2017
Take it to a garage and have them evacuate the system and refill with refrigerant. you have air and non condensibles in the refrigerant system.
Posted on Jun 02, 2009
That clutch and coil are serviceable without replacing the compressor but I have had little success with this as usually the clutch gets in that shape subsequently from activity going on inside the compressor which means that clutch is failed generally for a reason.replace the compressor -orfice tube-reciever drier and happy motoring......
Posted on Jul 18, 2009
check the thermo control amp, it is a sensor that keeps the evaporator from freezing. I had that problem on my 2000, it's a common nissan problem, google nissan ac problems.
Posted on Sep 22, 2009
Does it have the correct amount of freon, it can still blow cold with the wrong amout of freon, this will damage the compressor,you may also have a bad cycling switch or bad high preasure switch and even a bad connection to ac system,this first thing is to make sure the correct amount was installed,
Posted on May 20, 2010
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