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Weird heater problem

Discussion in 'Model S' started by samppa, Oct 5, 2019.

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  1. samppa

    samppa Member

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    so.. a friend has a weird problem with ptc heater.. maybe you guys can help out. Blows only cold air even at HI heat, then maybe after 30seconds blows really hot for a few seconds, then again cold air for next 30sec, then hot for a few seconds.. cycles like this.
    AC on/off has no effect.. model S from 07/2014.

    Is this ptc going bad or maybe some control module fault? Car gives no faults or error codes.
     
  2. boaterva

    boaterva Supporting Member

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    May not help but does it work on low speed? I’ve seen posts where the heater can’t keep up with high air flow; it’s cooled too much.

    It it works on low flow, that will tell you something. If not then it has a general problem.
     
  3. samppa

    samppa Member

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    Nope, same problem, fan speed doesn't affect.
     
  4. boaterva

    boaterva Supporting Member

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    That seems like then it’s a real resistor (heater element problem. Tesla have a comment? Out of warranty I assume...
     
  5. samppa

    samppa Member

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    Out of warranty.. can't get a comment from Tesla because they are impossible to reach by phone..
     
  6. boaterva

    boaterva Supporting Member

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    Had that issue checking on a car in for service. Phone went to VM. Texts finally answered.

    Have you tried support/car issues? They could pull the car logs and perhaps see what the issue is. Or make an appt from the app but phone support should be able to get somewhere.

    I never call the service center for anything except when I have a car on the premises.
     

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