2001 QX4
It has been 90+ degrees where I live and when idling for more than 10-15 min, the A/C stops blowing cold and is humid. Works great otherwise when ambient temps are low and car is moving. The Freon pressure is good. The Enser is old and has some dents, but has been cleaned and looks to be getting airflow. How can I tell what is wrong? Replace the radiator fan clutch? Condenser? Something else? Should also note that the engine temp gets high when on long stretches up uphill highway, but I think that is somewhat normal for an old car, no? Thanks!
Thanks for all the tips. Time to do some detective work.
When you flushed and replaced the coolant did you draw the lines down with a vacuum pump before filling with new oil/coolent? If it got moisture in the line it might have caused junk to form in the metering tubes? You can use an inspection camera to see if there is frost covering and blocking the airflow through the evap coil
Also as @jk43 said check the schematic and see it there is a high temp thermostat on the compressor, might just be a bad thermal switch or something wrong with the compressor
Yeah I used a pump. That reminds me. I think there might have been a leak because it wasn’t holding zero pressure. If that’s the case then moisture could be getting in, but wouldn’t that cause the system to not function properly all the time?
depends on how much is in it.
Do you know what the next steps would be to find and fix the leak? Dye? Leak detector device?
leak sniffer, last time I needed one I rented it from the auto parts store that had tool rental, it was like $5 but I had to leave A big deposit until I returned it.
Cool. I did that with the pump and gauge set. I’ll try it. Thanks!