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Veebyes's avatar
Veebyes
Explorer II
May 03, 2016

Hmmmmmmmmmm

Thats right. Hmmmmmmmmmmmm. What causes the hum in the transfer switch? Been living with it for quite some time. Any ideas before I take the cover off & start poking around?
  • Let it hum, isconnect - kill incoming power

    Then in a rush, check the temperature of the relay with your finger. Is it hot to the touch?
  • Have not forgotten the issue. Where we are at the moment is still pretty cold. Messing around with things outside is no fun when temps are in the 40s.