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AC Blowing Hot Air: Codes B1476, B14AA, B14B8

Discussion in 'Prime Care, Maintenance and Troubleshooting' started by Corey Lynch, Apr 19, 2024.

  1. Corey Lynch

    Corey Lynch New Member

    Joined:
    Apr 19, 2024
    2
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    Location:
    Seymour, IN
    Vehicle:
    2017 Prius Prime
    Model:
    Four
    I have a 2017 Prius Prime that is blowing hot air when the AC is activated. I do have access to a Snap On Diagnostic tool that showed the codes below:

    B1476: A/C inverter load system malfunction
    B14AA: Glass Humidity Sensor Circuit
    B14B8: Refrigerant shortage

    I have done a fair amount of research in this site as well as others, and it sounds like there is a common problem with the Servo motor. However, in another thread "Servo motor from hell" the codes in that thread were not the same as mind. I have also found some other cited issues related to the AC blowing Hot air when the temperature is above 85* and I believe that this applies in my situation as well. The other day the external temperature was in the high 70's/low 80s and the AC was blowing cool air. I'm not ready to say it was cold but it certainly wasn't hot. When driving home from work when the external temperature exceeded 85* it was blowing hot air.

    Another code that was thrown for anti-lock breaks that I found to be interesting was:
    C1241: Too Low or Too high battery volts.


    I'm new to this forum but any help would be greatly appreciated!

    Thanks in advance.
     
  2. Corey Lynch

    Corey Lynch New Member

    Joined:
    Apr 19, 2024
    2
    0
    0
    Location:
    Seymour, IN
    Vehicle:
    2017 Prius Prime
    Model:
    Four
    Update: my AC charge was low so I had it charged which removed all the codes but B1476.
     
  3. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    23,838
    15,494
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    B1476 still around after the recharge is a bit troubling.

    The code means it is taking the wrong amount of electrical power to run the compressor. Having the wrong amount of refrigerant can be a possible reason for that. The other possible reasons may be more serious.