tpnotch420 Posted July 30, 2008 Share Posted July 30, 2008 I recently started having problems with my 97 es300 ac working intermittently so I changed the expansion valve after doing some research that seemed to be the fix others were having success with. But that did not fix my problem so I ran the hvac diagnotic test and here are my results 13 21 (it was kinda dark when I did this) 42 now it just blows warm air all the time Quote Link to comment Share on other sites More sharing options...
tpnotch420 Posted July 31, 2008 Author Share Posted July 31, 2008 after I changed the expansion valve what procedure should I follow to fill with refrigerant Quote Link to comment Share on other sites More sharing options...
George_Jetson Posted July 31, 2008 Share Posted July 31, 2008 after I changed the expansion valve what procedure should I follow to fill with refrigerant You should pull a vacuum on the system, check for leaks (check the rate of rise), and then add freon. Make sure that you replace the oil that was lost when you discharged the system. The easy way to do this is to buy freon that already has oil added. It is normally a good practice to replace the receiver whenever the system is discharged, but I will admit that when I replaced the evaporator on my truck, I didn't change it out, and it is doing a good job keeping my truck cool down here in Texas. Quote Link to comment Share on other sites More sharing options...
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