Question about KitchenAid KHMS145KSS Microwave Oven

1 Answer

Rattling Fan Noise

When the oven is operating there is a rattling sound (sounds like a fan). Generally if the oven is on for a few minutes the sound persists. If the oven is on for a longer period of time the sound stops. However, as soon as you use the oven again the sound is back. THe sound has not impacted any operations at this point.

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  • Steve_b Jan 09, 2009

    Great. I was able to trace the problem as you suggested. Well done and thanks!!

    Steve


  • cmalcom03 Apr 08, 2009

    We have the same problem of a rattle with the same model KHMS145KSS. It also comes and goes but oven is still heating.
    Thanks for any help

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1 Answer

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  • KitchenAid Master
  • 8,820 Answers

If I had to bet, I would say the fan blade assembly is loose on the fan motor shaft.

If so, a spot of super glue where they meet will usually take care of that.

If that's not it, it should be investigated.

It is vital that the cooling fan runs properly, or the magnetron will be destroyed.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

After you look into this, if you still need help, please write back with more details.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Jan 03, 2009

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