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Radiator Fans ON & OFF at Full Speed when AC is Turned ON

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by e30is, May 12, 2021.

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  1. Adrien

    Adrien Junior Member

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    Yes that's why I asked for a refill so with new gas but I don't think the problem applied and the one specific to Toyota so I surely had the standard protocol with evacuation and new gas weighed
    For example, I still have to check for an outside temperature of 78f I'm under pressure off 97psi and starting 174psi whether for an instruction a 68for 60f
     
    #41 Adrien, Jul 22, 2023
  2. Adrien

    Adrien Junior Member

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    The compressor not running all the time, It sometimes goes to 0 rpm is that normal?
     
    #42 Adrien, Jul 26, 2023
    Last edited: Jul 26, 2023
  3. ChapmanF

    ChapmanF Senior Member

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    Yes, as long as the cooling load is being met.
     
    #43 ChapmanF, Jul 26, 2023
  4. Adrien

    Adrien Junior Member

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    Cela ne l'endommagera pas d'abordWon't that damage it prematurely instead of turning slowly it stops and starts again?
     
    #44 Adrien, Jul 27, 2023
  5. rjparker

    rjparker Tu Humilde Sirviente

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    If its 80f or more the compressor just slows down.
     
    #45 rjparker, Jul 27, 2023
  6. ChapmanF

    ChapmanF Senior Member

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    The compressor is variable-speed, but not all the way to zero. If you use an OBD-II scan tool and monitor the A/C compressor watts, it can run close to 3,000 watts at highest power, and down as low as 250 watts or so at lowest power.

    Below that power, it just stops. When I am driving at relatively low cooling loads (the cabin has already cooled down and is now stable), I usually see it cycling, 0 watts for several seconds, a few hundred watts for several seconds, and so on.

    I have no great fear of that causing any damage.
     
    #46 ChapmanF, Jul 27, 2023
  7. Adrien

    Adrien Junior Member

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    I looked via carista the speed of the compressor it goes from time to time to 0 then restarts when the temperature of the cabin is good
     
    #47 Adrien, Jul 27, 2023
  8. CR94

    CR94 Senior Member

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    That's normal.
     
    #48 CR94, Jul 27, 2023
  9. Adrien

    Adrien Junior Member

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    Going to zeros for a few seconds is normal
     
    #49 Adrien, Jul 28, 2023
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