Question about Zanussi ZMB30CST Convection Microwave Oven

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Zmb30cst light problem

Hi I had a problem with the Zanussi ZMB30CST 900 Watts Convection. Basically the light stayed on when the door was shut so I opend the door and stuck a pen into the light hole (very lightly)!

This caused the fuse to trip! now that is that - if I switch the power on to the microwave the fuse trips!

Any help is appreciated


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  • dhk777 Mar 14, 2009

    I have kitchenaid kbmc147 with a door switch problem. Took the unit out and replaces the switch but still getting the "Door" error message.
    I thought perhaps I mixed up the NC/NO plugs so I switched them around but with no luck. Is there something else I need to do after replacing the door switch? Is there some sort of reset I have to do?
    Please help. I would hate to call a service technician for a simple replacement of part like this.



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This is usually caused by either a bad door switch or a loose door switch mount.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

If you or someone you know decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa:.

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

Posted on Oct 24, 2008


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