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Door closing trips circuit breaker.

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There is an intermittent problem with this microwave. When you the close the door it will trip the circuit breaker

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  #1 (permalink)  
Old 05-19-2013, 01:37 PM
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Default Door closing trips circuit breaker.
Model Number: MH7140XF   Brand: Whirlpool   Age: More than 10 years   

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There is an intermittent problem with this microwave. When you the close the door it will trip the circuit breaker in the service panel. It does not happen every time . Could this be the door switch? If so what part number do I need to order?


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  #2 (permalink)  
Old 05-20-2013, 02:49 PM
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Hello,

The problem can be a bad door switch (interlock and/or monitor) as well as a bad switches mounting plate. Unplug the microwave and open the control panel. Check all switches for continuity with the door open and locked. Make sure all switches are properly engaged when the door is locked.

In case of any shortage in the microwave the inline fuse should blow. If it did not happen then probably the circuit breaker is too weak.

What is the end of the model number?

Gene.
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  #3 (permalink)  
Old 05-25-2013, 11:24 AM
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Default Model #

Hello Gene,
This trips the breaker when the door is opened. I gave you the wrong info in the first post. I replaced the ceramic internal fuse a coupe of years ago and it never happened again . Now it has this issue with the breaker tripping when the door is opened. Here is the full model number MH7140XFB-0 Serial xcj3550513
Thank you for your response.
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  #4 (permalink)  
Old 05-28-2013, 01:49 PM
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Hi,

It does not make a difference. The test procedure is still the same. You have to determine winch part is bad before order any.

Here are the breakdown diagrams and Parts for Whirlpool MH7140XFB0 Microwave - AppliancePartsPros.com

Gene.
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