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Noise from EBH?

Discussion in 'Gen 2 Prius Technical Discussion' started by tekn0wledg, Oct 3, 2007.

  1. tekn0wledg

    tekn0wledg New Member

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    I was the recipient of Wayne's 48th EBH install last weekend [thanks Wayne!] and I have been using it this week. One thing I have noticed is when I approach the car in the morning to unplug the EBH, it is making a slight ticking or clicking noise under the hood. This is not something I normally hear when the EBH is not plugged in. Just to confirm, this morning I didn't plug it in and waited several minutes but did not hear the noise.

    It occurs every 15-30 seconds. It might be random or at an interval, I am not certain.

    My question is, is this normal behavior for the EBH and it's operation? Or should I be concerned that the EBH is faulty?

    Any help is appreciated.

    Thanks!
     
    #1 tekn0wledg, Oct 3, 2007
  2. Skwyre7

    Skwyre7 What's the catch?

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    We haven't gotten our timer yet, nor another extension cord, so I haven't plugged mine in yet. So I have no experience in the noise you're hearing. I'm guessing that it sounds similar to an iron when plugged in. I know my iron clicks whenever the heating element goes on or off. It turns itself off so it doesn't overheat, obviously. Could that be it?
     
    #2 Skwyre7, Oct 3, 2007
  3. alanh

    alanh Active Member

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    As far as I know, the EBH does not have a thermostat. It will burn itself out if not for the mass of the engine.

    It's possible you're hearing metal expansion/contraction in the engine block.
     
    #3 alanh, Oct 3, 2007
  4. tekn0wledg

    tekn0wledg New Member

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    <div class='quotetop'>QUOTE(alanh @ Oct 3 2007, 05:06 PM) [snapback]520831[/snapback]</div>
    Yeah, I spoke to Wayne about this yesterday, briefly. Basically it sounds similar to a traditional car once you've powered it off.... so my guess is it's the engine block expanding as it's heated.
     
    #4 tekn0wledg, Oct 4, 2007
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