Recently our kitchen exhaust fan stopped working, only humming and not moving. In the kitchen there's a butterfly damper, the exhaust switch is on the vent hood, and the motor and exhaust fan are on the outside of the house. exterior fan

Did some troubleshooting with the motor, tried cleaning it up but it's DOA. In doing some research it appears this fasco motor is from the 60s(give or take).original motor I called some manufacturers and found a supposed replacement since that model isn't produced anymore. Unfortunately I didn't look over the diagrams and the replacement didn't have the same mounting bolt holes.

I did some digging and found a replacement motor, ordered it and it fits (it's a fasco d367). But I noticed the new motor has a big warning to ground it, but it doesn't have a ground wire. I don't see the two squares on the label saying it's double insulated.

The original motor didn't have a ground wire either, but the dome and components had a ground wire and so were grounded(partially disconnected in this pic when removing the motor). original wiring


So is the ground wire on the metal dome enough to ground the motor through the case? Or is there something else I need to be doing to properly ground the motor?


Here are some pictures of the new motor for reference. new motor new motor 2 new motor 3


1 Answer 1


If it's bolted to a grounded metal case, it's grounded.

  • @manassehkatz-Moving2Codidact -- the OP mentioned that there's a ground wire to the dome, and there's one visible near the end of the cable jacket in the updome shot Mar 9, 2021 at 2:38
  • 2
    Aha. Now I see - the cable is coming through a hole in the dome. Mar 9, 2021 at 2:43
  • Awesome, this was a pretty easy solution! Thanks for the help all! Mar 9, 2021 at 20:35

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