Question about Mitsubishi Montero Sport
Hi, if you have full pressure (40-50 PSI on low pressure side with engine running A/C set to maximum and blowing) you have enough pressure, but there is air in the system which degrades the refrigerant leading to no cold air. To remedy this, you must completely discarge the system and refil with new R134a which has the compressor/system oil added to it.
To discharge the system, shut off motor, attach your filler hose to low pressure valve and allow system to drain. (squeeze handle if you have that type filler hose) Allow it to drain until no sound of escaping air is present. Be careful not to have the end of hose facing you or others, wear gloves and have some shop rags laid down, pointing nozzle toward rags, that stuff can damage paint and skin and may be cold when escaping. After system has completely drained, start the refil process with engine running, A/C on maximum, blower on full. After about 1/2 of the first can of R134a or 1 full can, your compressor should kick on. Continue refilling with 3-4 cans total (about 3 LBS total) until you have a reading of 45 or so PSI. After each can, allow refrigerent to cycle through the system about 3 minutes to obtain an accuret pressure reading. Pressure is relavent to outside temperature also, optimumly the ambient air temp. outside vehicle should be between 72 and 80 degrees F. for proper reading. That should get you blowing cold air again!
Please rate this answer! Thanks, Mike
Posted on Jun 14, 2011
Tips for a great answer:
Jul 02, 2014 | 1999 Mitsubishi Montero Sport
May 30, 2014 | 2002 Mitsubishi Montero
May 01, 2014 | 2003 Volkswagen New Beetle Convertible
Jul 29, 2011 | 2001 Mitsubishi Montero
Jul 16, 2011 | 2003 Audi A8
Mar 22, 2011 | 2003 Mitsubishi Montero Sport
Jul 25, 2010 | 2006 Chevrolet Impala
Jun 28, 2009 | 1999 Isuzu Amigo
413 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: