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What would be wrong when the compressor on the 99 Chrysler Concorde runs continously - car does not cool and the gauge is checked and the low side is running high
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First, I'm not a Chrysler Mechanic.
* I could not find the specific answer to your question.
* I did find this vid on you tube (careful about the crude language) https://www.youtube.com/watch?v=zTZvPhxuZ-o
Should be two ports with black caps on the ac lines or the compressor. One is bigger than the other to help prevent you from connecting to the wrong side of the compressor.
If you fill it with freaon after evacuation the first charge at the pressure of the can is enought to close the switch if not theres a leak or something eles is wrong, The low side switch being crossed will speed things up but is'nt recomended as the freaon can freeze up as it forced charged and overpressure and hose or condender failure is'nt worth the faster speed of charging. A freaon charging station will fully charge the system without even starting the car.
Generally, low side A/C pressure is measured by a gauge that ranges from 25psi to 45 psi when the compressor is engaged and the engine is running and the a/c is set on its coldest setting.
YOU NEED A R-134 GAUGE SET TO CHECK LOW PRESSURE SIDE AND HIGH PRESSURE SIDE.YOU ALSO CAN BUY A LITTLE CHEAPER GAUGE TO CHECK YOUR AC LOW BLUE SIDE AND HIGH RED SIDE AT ANY AUTO ZONE OR ADVANCE AUTO PARTS.WHAT YOU DO WHEN YOU GET YOUR GAUGE SET HOOK GAUGE TO LOW PRESSURE SIDE BLUE CAP PORT AND GAUGE TO HIGH SIDE PRESSURE RED CAP PORT.YOU CRANK CAR UP GET IT OPERATING TEMPERATURE.THEN TURN AC ON HIGH COOL LET RUN 3 TO 4 MINUTES.CHECK LOW SIDE GAUGE READING SHOULD BE 28 - 32 PSI. HIGH PRESSURE SIDE GAUGE SHOULD 199 - 228 PSI. THATS NORMAL CHARGE. SEE YOU CANT JUST RECHARGE AC SYSTEM UNTIL YOU CHECK IT FIRST YOU WILL DAMAGE SYSTEM .NOW YOU CAN GO TO AUTO ZONE PARTS BUY A CHARGE CAN WITH GAUGE AND HOSE.ATTACH TO IT.YOU NEED MORE THAN ONE CAN.WARNING MAKE COMPRESSOR IS RUNNING WHEN YOU TURN ON AC .BECAUSE IF COMPRESSOR NOT RUNNING CHECK FUSE AND AC COMPRESSOR RELAY.IF BOTH OKAY.YOU COULD HAVE OPEN CLUTCH COIL A FAULTY LOW PRESSURE SWITCH WILL CAUSE AC NOT TO WORK. IF LOW PRESSURE GAUGE BLUE SIDE PRESSURE IS 28 OR 30 YOU DONT NEED A CHARGE.PROBLEM SOME WHERE ELSE.BE SURE TO WEAR SAFETY GLASSES WHEN WORKING ON AC SYSTEM.
You need to hook up a gauge on the service ports. They have small pocket ones at the parts store. Rule of thumb is the pressure with car off, should be about the same as ambient temperature.
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