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!

  • venusaur@lemmy.worldOPEnglish
    0·
    3 months ago

    Thanks for all the tips. Time to do some detective work.

    1. I’ll check if the compressor is spinning next time.
    2. i flushed and refilled the coolant last year and made sure it was balanced on both sides based on the ambient temp using a gauge set. I could check again. How could I tell if it’s icing up?
    3. I see a puddle under the car when parked after A/C has been on, but I’ll check to see if it’s blocked.
    4. Condenser is as clean as I can get it. I’ll have to open the dash/glove to check the evap coil. Maybe a camera would work.
    • AbidingOhmsLaw@lemmy.mlEnglish
      0·
      3 months ago

      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?

      • venusaur@lemmy.worldOPEnglish
        0·
        3 months ago

        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?