2017 Prius 2 Blows Hot Air Driver Side Only No Cold Air

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by CalBoy9999, Apr 21, 2023.

  1. CalBoy9999

    CalBoy9999 New Member

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    Apr 21, 2023
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    Location:
    San Francisco Bay Area
    Vehicle:
    2017 Prius
    Model:
    Two
    My prius suddenly started blowing very hot air driver side only and when AC and fan off but air outside to inside option is on hot air comes in and vents are very hot. If i keep circulate air inside and AC off Fan off everything is off. When I start my car cold in cold weather for few minutes cold air comes and then hot air starts coming driver side only. My neighbor who is a mechanic for school district buses says there is no leak in ac system after testing and it may be heater air door actuator. What do you guys think? Toyota dealership here wants $199 for just a diagnostic. Any easy way to find AC diagnostic codes for my 2017 Prius 2? Any help very much appreciated.
     
    #1 CalBoy9999, Apr 21, 2023
  2. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    Vehicle:
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    Two
    The HVAC system has its own diagnostic mode. There are youtubes showing the secret handshake.

    The blend door actuator is a fair bet, fits those symptoms well. Sounds like it got stuck in the heat position.
     
    #2 Leadfoot J. McCoalroller, Apr 22, 2023
  3. Elektroingenieur

    Elektroingenieur Senior Member

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    It’s also described in the Repair Manual (more info) and the last few paragraphs of this previous posting.
     
    #3 Elektroingenieur, Apr 22, 2023
    Leadfoot J. McCoalroller likes this.
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