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E-Niro 64kWh '4' since 9/20 (was Prius)
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That is normal expected behaviour. However, in light of the known failures of PTC heater elements, IMO its wiser to leave the entire HVAC set to auto and simply adjust the target temperature to your preference. Why would you want to turn the fan speed down? It slows itself down when you reach target temperature anyway :unsure: . I never ever touch the fan speed knob myself. Full auto climate control takes care of everything automatically.... temperature, humidity, heating, cooling and ventilation.
Peter
 

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E-Niro 64kWh '4' since 9/20 (was Prius)
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1,768 Posts
Just leave it on Auto (led lit on auto knob) always. Then select temperature dial to your preference I use 19/20/21 mostly. If you do that it couldn’t be simpler. The fan will soon slow down. Remember it’s thermostatic, so sometimes it will blow warm sometimes cool.
The only other setting I might use is the off button, if cracking open the windows.
Oh and of course the recirculating button when it’s appropriate.
Then hit Auto again when windows are closed. I think if you follow this regime, you will be happy. Peter.
 
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