Nissan Repair: nissan quest A/C compressor, nissan quest, receiver dryer


Question
Hi Von !!!!!!!
         Thanx for answering back. I did try as you advised , when I inserted the hose into low side meter reads the pressure upto 125 psi, I do not know how much of that is correct(interdynamics EZ chill KIT). Other than that nothing happened.Compressor did not come on and I could not find pressure switch connection and where I can find reciver dryer?
 I did the whole thing while engine running and AC knobs turned to max.
       Waiting for your expert advise. Thanx
deejay

-------------------------
Followup To
Question -
Hi Von !!!!!!!! I have a Nissan Quest 95,when I turn on the Air conditioner, the compressor does not come on. Any suggestions. thank you.
Answer -
Deejay,

If you turn on the airconditioner and the compressor does not activate you are probably low on refrigerant.  The system has a pressure switch that will not allow the compressor to come on when the system is low on refrigerant.  So, get a can of R-134 with a quick charge connection hose and plug it into the low side of the system.  Do not worry about blowing up the can as the high side connection is different from the low side sonnection and the hose will not fit the high side.  So, plug the connection onto the low side connector and open the valve.  If the compressor does not come on get a paper clip and bridge the pressure switch connection.  This is the plug by the receiver dryer and when you bridge the switch, with the airconditioner on, it will allow the compressor to operate.  The can should get cold as the system sucks it in.  If the can stays full and does not go into the system you are completely out of refrigerant and your system will have to be evacuated to get it to take refrigerant.  Now, if this is the case be sure to disconnect the paper clip that you were using to bridge the connector, that connects to the high pressure switch and take it to a shop to get it evacuated and charged.

Answer
Deejay,

The pressure switch is located by what looks like a black or aliminum can that the hoses go into.  On yours it should be close to the firewall on the passenger side.  The switch has two wires that come out of it and that is what completes the circuit when the system is working within normal pressures.  So, this is where you bridge the connection to get the compressor to come on.  Now, understand that you probably have a slow leak that has allowed the system to dischange and you might get lucky and the system will last through the summer.  But, I would be looking for the source of the leak to correct it later on.  What you look for is a greasy place on the lines or connections as the refrigerant also has oil in it that leaks out.