The heat is off, but cabin gets balls hot

Discussion in 'Prius c Care, Maintenance and Troubleshooting' started by poggo, Apr 10, 2024.

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  1. poggo

    poggo Junior Member

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    My Prius C has 177K miles and the cabin is getting uncomfortably warm, as if the heat is on.
    The heat is off, but things are so hot. Does anyone have a similar occurence?
     
    #1 poggo, Apr 10, 2024
  2. Sonic_TH

    Sonic_TH Active Member

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    Mar 18, 2020
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    Vehicle:
    2016 Prius c
    Model:
    Two
    Same happened to me, the only fix i found without having to disassemble the entire dash to replace the hot / cold air actuator door, was to disconnect the 12v battery for a few minutes and connect it back, then turn on the A/C, turn the knob to max cold and leave it there, it blows cold now.

    Let me know if it works for you too.
     
    #2 Sonic_TH, Apr 11, 2024
  3. ChapmanF

    ChapmanF Senior Member

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    If that fixes it, sounds like the driver chip running the air mix servo just losing track of where it is.

    You can probably get the same effect by finding the fuse that supplies the A/C amplifier and pulling that, without losing as many car settings as when you unhook the whole 12 V battery.
     
    #3 ChapmanF, Apr 11, 2024
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