Ac blowing warm after water pump install.

Discussion in 'Gen 3 Prius Technical Discussion' started by CurtisGreen, Jul 2, 2025 at 6:19 AM.

  1. CurtisGreen

    CurtisGreen Junior Member

    Joined:
    May 29, 2024
    3
    0
    0
    Location:
    NoVA
    Vehicle:
    2014 Prius
    Model:
    Four
    I replaced the water pump and thermostat. Stupidly, when I took the connector for the AC compressor out, I didn't cover it with plastic. So, when I disconnected the hose from the thermostat housing it filled the ac compressor connector socket with coolant. I blew it out with a can of air and it looked dry. I got everything put back together and went to start the car. The AC was blowing hot and the Check Hybrid system message came on. Would the coolant spilling into that connector socket be enough to kill the compressor? Is there a way to test the compressor to see if it's dead? Could I have caused a leak in the AC lines by knocking into them while removing bolts from the water pump?
     
  2. CurtisGreen

    CurtisGreen Junior Member

    Joined:
    May 29, 2024
    3
    0
    0
    Location:
    NoVA
    Vehicle:
    2014 Prius
    Model:
    Four
    This was the pressure. Was the same with car on and AC on and when the car was off.
     

    Attached Files:

  3. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
    12,141
    2,144
    0
    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    That's right no hi and lo sides exist until compressor is on .
     
  4. BiomedO1

    BiomedO1 Senior Member

    Joined:
    Mar 27, 2021
    2,784
    1,479
    0
    Location:
    SacTown, Ca
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    The AC pressure sensor switch is in that general area. Perhaps you knocked it loose or broke a wire????
     
    CurtisGreen likes this.
  5. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    58,895
    40,552
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    There could be codes associated with that.

    How about the high voltage (orange) connector to the compressor: any chance it's not in place.