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-   -   Janitrol heat pump hum (https://www.askmehelpdesk.com/showthread.php?t=212680)

  • May 5, 2008, 05:21 AM
    n7ilt
    Janitrol heat pump hum
    My eight year old Janitrol heat pump seems to work fine, but when not running I hear a low humming noise coming from the outside unit. Any help out there? Jerry
  • May 5, 2008, 06:45 AM
    aldematt57
    It's likely a low voltage coil that is noisy either on the contactor, reversing valve or both.
    Have a tech disconnect power and inspect and tighten all wiring connections and then don't worry about it.

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