Question about AC Cars & Trucks
DID YOU USE AN EVACUATION PUMP TO PUT A VACUUM ON THE SYSTEM AND OBSERVE WHETHER IT HELD THE VACUUM OVER TIME? THIS IS A LEAK CHECK. DID YOU USE GUAGES TO ADD THE CORRECT CHARGE VOLUME? WERE THE READINGS DIVERSE ONE HI READING AND ONE LOW READING? IS THE SUCTION LINE GETTING COLD UNDER THE HOOD? THE LARGE AC LINE THAT ENTERS THE CAR AT THE FIREWALL IS THE SUCTION LINE. DOES THE COMPRESSOR CLUTCH ENGAGE?
Posted on Apr 06, 2015
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Posted on Jan 02, 2017
SOURCE: AC problem
is the compressor turning on? when you turn thwe a/c? on,
and also locate the low side line on engine compartment and feel if is cold, if it is, then your blend door system is not working,
the blend door does control the cold and hot air coming to engine.
Posted on Jul 02, 2008
What you will be looking for (in your engine compartment) looks almost like a large valve stem that you would see on a tire. It will probably have some kind of plastic cap on it.
It shouldn't be that difficult to find. You may want to search for an engine compartment diagram for your make/model/year vehicle.
Posted on Mar 19, 2009
Several- The system should hold freon for years without leaking. There are pressure switches and they cut off the compressor with an undercharge and an overcharge. You need guages to measure the charge. There are testers the A/C shops have called "sniffers" which can detect a leak. If you have no leak then you need a technician to add or remove freon to get the concentration right. Or you need guages.
Posted on Jun 12, 2009
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