We need to change a sensor that is underneath the a/c compressor, the manual says that we should just be able to lift the compressor out, and get to it, however we can't and when we tried, the compressor started hissing and leaking. Any advice would be greatly appreciated!
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Re: changing a sensor underneath ac compressor.
The crankshaft position sensor is on the right side of the engine just to the rear of the right hand exhaust manifold, the sensor is attached to the block with two bolts, part of the sensor overhangs the transmission bell housing. Look at the bell housing and start going up, you will see the sensor almost inline with the right exhaust manifold. It has a gromment that overhangs the transmissions bell housing. Use a flashlight from below and you will see it, good luck
Check for pressure switch located at the top of the drier-if there try jumping across it
as there are many places in the compressor from where the feron gets leaked but if its leaking heavily and if not possible to stop it is quite possible you will have to replace the compressor.
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besides replacing the compressor you have to change the accumulator/ drier and recharge with the correct gas
AS this requires specialist knowledge it will be best if you have an accredited ac specialist shop do the job
start off with the cheap possibilities and make your way threw. I'd start off with replacing Air Charge temperature sensor, make sure your AC Hose isnt leaking anywhere, if those dont solve it then replace ur AC clutch, last chance would be replacing AC compressor. sometimes the compressor will malfunction randomly. or the AC clutch might malfunction aswell. covering these steps somewhere along the line you will have working AC again! good luck
Since al components are functional then the only thing left is the wiring. And since the power isn't completely off that means that you have a bad contact. Take the center console out and check the entire wire loom starting with the relay.
You should also take a look at the oil sensor on top of the compressor - it might be faulty. Make a bridge over it and see it the ac starts.
YOU TAKE TO A GARAGE LET THEM PUMP IT DOWN FIRST MAKE SURE YOU PUT THE RIGHT AMOUNT REFRIGERANT OIL IN COMPRESSOR.IT COME WITH SHIPPING OIL IN IT BUT YOU HAVE TO POUR IT OUT.PUT IN THE RIGHT AMOUNT OF REFRIGERANT OIL IN COMPRESSOR LOOK IN OWNERS MANUAL TO PUT IN THE RIGHT AMOUNT.NOW IF YOUR OLD COMPRESSOR SEIZED OR LOCKED UP THEN LET GARAGE FLUSH OUT METAL SHAVINGS OUT .IF YOU DONT FLUSH OUT SHAVINGS THE NEW COMPRESSOR WILL BE DESTROYED.ALSO YOU HAVE TO REPLACED THE ACCUMULATOR OR ORIFICE TUBE IF EQUIPPED.IF OLD COMPRESSOR DIDNT LOCK UP.PUT NEW REFRIGERANT OIL IN COMPRESSOR IT TAKE AT LEAST 1 OUNCE OF OIL BUT CHECK OWNERS MANUAL ALL VECHICLE HAS DIFFERENT SPECS.AFTER COMPRESSOR OIL BEEN PUT IN EVERYTHING ALL REFRIGERANT LINES TIGHT.TAKE VECHICLE TO A GARAGE THAT DO AIR CONDITIONER WORK.THEY HAVE TO USE A VACUUM PUMP TO PUMP DOWN THE AC SYSTEM TO REMOVE MOISTURE AND LEAK TEST THE SYSTEM WHILE IT PUMP DOWN.IF YOU DONT LET THE GARAGE PUMP DOWN SYSTEM. THE MOISTURE WILL FREEZE UP IN AC SYSTEM CAUSING POOR OR NO COOLING.THE GARAGE GOING TO CHARGE YOU TO PUMP DOWN AND CHARGE UP SYSTEM.IT WOULD BE CHEAPER TO DO THIS THAN TO BUY A VACUUM PUMP AND MANIFOLD GAUGE SET.WHEN DOING AC WORK YOU NEED SPECIAL EQUIPMENT AND TOOLS TO DO THE JOB OR THE AC SYSTEM WILL NOT WORK RIGHT.
Are you sure the noise is coming from the compressor and not the belt tensioner or other accessories, when you turn the ac on it put more of a load on the engine. If not since the compressor was changed twice was it properly oiled and the clutch turned manually to insure proper lubrication. I am hoping if it is the compressor that the reciever dryer and expansion valve was changed and the ac system was flushed well, to insure no contamination, or blockage damaging the new compressor.
I have the same problem, I was told to check the A/C pressure sensor built in with the compressor. disconect it and do a resistance test, it should give you a reading of almost infinitive , if it gives you al OL reading then that needs to be change. this is according to an expert.