4th Gen DIY heat exchanger bypass solution

Discussion in 'Gen 4 Prius Main Forum' started by texasdiver, Jul 28, 2022.

  1. ChapmanF

    ChapmanF Senior Member

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    Vehicle:
    2010 Prius
    Model:
    IV
    The ECO mode doesn't change anything about where the hot coolant physically comes from. It just slightly lowers a software limit on how hard the system will blow the heat at you. (It also rules out the use of the supplemental electric heat before the engine warms up—at least in gen 3. As far as I know, gen 4 also has the electric heat and this is probably the same.)
     
    Mendel Leisk likes this.