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Thread: GMC305PRB03 Door error on microwave

  1. #1
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    Default GMC305PRB03 Door error on microwave

    Model Number: GMC305PRB03
    Brand: Whirlpool
    Age: 6-10 years

    I have a door error displayed whenever I try to use the microwave on my Oven/Microwave combo wall unit.

    Specifics:
    The oven portion of the combo unit works
    The control panel has power
    When I press START for the microwave it displays DOOR and does nothing
    The light inside the microwave also will not come on

    I have left it without power for a day and tried again to no avail. I have unscrewed the door switches and raised them as much as I could and then screwed them back in as suggested on some forums to no avail either. I assume that one of the fuses inside the unit have blown or the switches but I do not see how to remove the control panel to get at anything to check for continuity (the screws on the face of the unit only seem to mount the door switches). Does anyone have a set of actual tear-down instructions they could share?

    Thank you

  2. #2
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    Default

    One of the door switches is probably bad. You'll need a meter to check the microswitches for continuity. Check the switches by opening and closing the door. Always remove power when measuring resistance. Always remove at least one wire from switch when checking continuity.
    Click image for larger version. 

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    Door Switch W10211972
    Click image for larger version. 

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  3. #3
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    Hi Rick,

    I'd like to do that but as I mentioned I cannot figure out a way to remove the front panel to get at them.

    Also, would the overhead light in the microwave be out if the door switch was bad or would that indicate a bad fuse.

  4. #4
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    Quote Originally Posted by kodama76 View Post
    I cannot figure out a way to remove the front panel to get at them.
    There should be a screw on each side of the panel. Remove the screws and it should come off.

    Quote Originally Posted by kodama76 View Post
    Also, would the overhead light in the microwave be out if the door switch was bad or would that indicate a bad fuse.
    If the light comes on when you open the door and you have a bad door switch the light wouldn't come on.
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  5. #5
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    Thanks Rick, the light being off does make sense now.

    Sadly, as I mentioned in my original post, the three screws on either side of the front panel do not appear to be what is holding it in place (4 of them hold the switches to the front panel).

  6. #6
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    Are we looking at the same machine? Can you take a picture or two and post them here so I can have a look?
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  7. #7
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    Default

    Sorry, I should have done that earlier. I was also mistaken about the number of screws (4 on each side) that appear to hold the switches and the hinges to the front panel but the panel stays firmly attached to the unit after they are unscrewed.

    Thank you for looking into this.Click image for larger version. 

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  8. #8
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    OK, put those screws back in. That's not a panel. I thought you were trying to remove the control panel. To check the switches you'll need to slide the oven out from its installation. You won't need to take it out completely but you'll need something to support the front of the oven. Then remove the side panels to check the switches:
    Click image for larger version. 

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