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Put new ac compressor on how do i charge ac - 2000 Dodge Grand Caravan

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You need to also repalce the drier, make sure the compressor has the amount of oil required, vac down the system then charge with proper amount of r134a.

Posted on Aug 04, 2010

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1 Answer

Why won't the A/C turn on?


You did put 134a back in? But possibly not enough? There is a pressure safety switch somewhere in the system that detects pressure and opens the circuit if not enough freon. At least that is where I would start. Does the Compressor turn freely otherwise by hand? Did you get enough compressor oil into the system (new Compressors need special charge with compressor oil).

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Why is there a rattling sound under my hood after i re charged my ac?


The possible problem here is that you put in too much gas and the compressor pistons are pumping liquid and not gas . This is hammering the rod ends on the swivel plate and if allowed to continue will result in compressor failure requiring a new compressor Have an accredited ac specialist shop check the pressures in the system and adjust to correct levels.

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Where is the low ac port on 1999 Mitsubishi gst


The charging port is in the low side AC line from the AC compressor on the engine, the low side line is the larger of the two lines coming from the AC compressor.

Jul 11, 2012 | Cars & Trucks

1 Answer

If my compressor wheel isn't spinning how do I know if it is the compressor or the ac clutch? System is charged but ac is blowing hot air


The question is: why isn't the compressor clutch turning

The compressor isn't likely seized,it may leak refrigerant,
but won't be what your asking.

The clutch can be jumped to test that

If okey, then you have to diagnose the entire
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How do you know it is properly charged,you put
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Jun 27, 2012 | 2006 Kia Sorento

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My 1997 cadillac refrigerant , i got r 134 coolant that it said to buy and the compressor want come on to charge on the gage its almost to the red (warning) level do i keep putting in till it gets enough...


NOPE STOP CHARGING DONT PUT NO MORE REFRIGERANT IN SYSTEM.DO GOING TO DAMAGE NEW COMPRESSOR AND THE EXCESS PRESSURE WILL BUILD UP CAUSE THE REFRIGERANT CANISTER TO BURST EXPLODE INJURY OR FATALLY HURT YOU. BEST TAKE CAR TO A GARAGE.LET GARAGE PUMP DOWN AC SYSTEM AND CHARGE UP.BECAUSE YOU WILL DAMAGE NEW COMPRESSOR. MOST OF TIME I WILL HOT WIRE THE AC COMPRESSOR. MAKE SURE COMPRESSOR HAS 2 OUNCES OIL IN IT.IF COMPRESSOR START UP NO OIL IT WILL LOCK UP.DONT KEEP PUTTING REFRIGERANT IN THE AC SYSTEM, THE R 134A GOING TO FREEZE UP TOO MUCH MOISTURE IN SYSTEM YOU HAVE TO HAVE A VACUUM PUMP TO PUMP DOWN AC SYSTEM CHECK FOR LEAKS BEFORE CHARGING SYSTEM UP.LOW SIDE NEED TO BE 31 - 36 PSI THE HIGH SIDE SHOULD BE 165 - 205 PSI.

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3 Answers

Hi..i had to change a/c condencer, and the a/c compresser, both at the same time.how will i go about charging the system? do i need to add coolent too both ports? or just the low side.?


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.

Jun 12, 2010 | 2004 Nissan XTerra

1 Answer

Air compressor wont come on to to put in 134a


The AC compressor does not have to be running to charge the AC system, and the low pressure switch will even prevent the AC compressor from operating until there is sufficient pressure to operate the AC compressor without damaging it.

Start the engine and turn on the AC, then charge the system with the R-134a and as soon as there is enough pressure built up to trip the low pressure switch off, the AC compressor clutch should then engage and then finish charging the AC system.

May 31, 2010 | 1997 Cadillac DeVille

1 Answer

Rplacing an AC compressor on a 2002 Volvo S70


will be ok compressor will not operate until system is gassed pulley will just freewheel . the oil will be put in when system is gassed a pressure switch in the air con pipe prevents it operating until at correct pressure

Dec 06, 2009 | 2000 Volvo S70

1 Answer

What do I have to do to change the a/c compressor are there any special procedures or can I take the old one off put the new one on and then charge the system with coolant I have a 1996 oldsmobile delta...


if old compressor fail your air condition has to be discharge at dealership or a garage that does ac repair.then the ac lines has to be flushed out before putting on new one. because old one when it fails clutch lock up or compressor fail.small metal particles get in line.stop up orifice tube.you will have to replace orifice tube the accumalator .you will need vacuum pump to pump down air conditioner .to get moisture out of system.you will need a manifold gauge set for air conditioner.ac tools are expensive.it would be cheaper to buy compressor - accumulator - orifice tube. take it to a good air conditioner mechanics.let him put parts on and pump down system.then charge it up.because buying tools to get ac going .is going to cost $475.00 thats the vacuum pump price.you can buy a cheaper vacuum pump that works from air from a regular air compressor you pump tires up with.manifold gauge set causes from $100.00 up to $300.00 for a good set.another thing you have to be familiar with working on air conditioners you put too much R-134 in system you will damage compressor or get seriously hurt.

Jul 05, 2009 | 1996 Oldsmobile 88

1 Answer

98 mustang squealing and ac


first thing to do before you charge it again replace the 'O' rings in back of the compressor also add some a/c oil because that will help the a/c compressor not to rattle this is the way I do mine I put in a can of 134A first and after that I put in the 134A oil and then I put in the rest of the 134A that is needed
I would disassemble the front brakes and check out the wheel bearings and sometime there is nothing wrong with them just need to add bearing grease but if they are scarred or damaged replace them

Jan 29, 2009 | 1998 Ford Mustang

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