Author Topic: Microwave Fix  (Read 133 times)

Offline stokester

  • Hero Member
  • *****
  • Posts: 518
  • Air-cooled!
Microwave Fix
« on: January 16, 2023, 09:43:25 AM »
About a week ago I went to use my over-the-range Maytag microwave and found the cooling fan (not exhaust) would come on when the door was opened.  I mentioned it to my wife and she said that she noticed it as well so naturally I blamed her for breaking it.   :)

I installed this microwave in 2009 and I suspect it is made by Whirlpool so is a common design.  Thinking that the control board was shot and it would have to be replaced I did quick search on the symptom and found a YouTube video explaining how to access suspect microswitches. 

A few screws, Phillips and #20 Torx I opened up the control area and found a service paper with location and the logic of the door switches.  There are two screws on the top to remove a trim piece and a screw at the top and one at the bottom of the control panel to allow the control board to swing out from the top.  This allows access to the three interlock switches, one the upper latch and two on the bottom.  The service paper identified two NO switches and one NC.  A quick check with a meter found a bad switch and two days later Amazon delivered a replacement to fix the situation.  The piece holding the switches is held on by two #20 Torx and then has two clips holding it to the chassis.

Some images that may help someone with a similar problem.
« Last Edit: January 16, 2023, 02:15:56 PM by stokester »
Nick
Yorktown, VA

Offline bonneyman

  • Hero Member
  • *****
  • Posts: 3698
Re: Microwave Fix
« Reply #1 on: January 16, 2023, 04:35:37 PM »
Hey, I'm glad you got your microwave fixed.

My apprentice and I found a microwave thrown out near the trash dumpster in our back alley. Figured it'd be a good project for the apprentice to put his hands on. Found out it was a gummed up with foodie scraps microswitch on the front door. (I.e. unit would come on even with the door open. Yikes!).

Dug through my bin of old used electrical stuff and found a suitable microswitch. R & R'd it - that 1988 Panasonic microwave is still (years later) at work in my kitchen! lol