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Jenn Air Microwave keeps blowing 20AMP Fuse.

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Hi - I have a Jenn Air JMV9169BAP Microwave - approximately 6 years old - last week it stopped heating

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Old 01-07-2013, 06:26 PM
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Question Jenn Air Microwave keeps blowing 20AMP Fuse.
Model Number: JMV9169BAP   Brand: Jenn-Air   Age: 5 - 10 years   

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Hi - I have a Jenn Air JMV9169BAP Microwave - approximately 6 years old - last week it stopped heating food - I replaced the Megatron - turning the microwave on to boil a glass of water, the unit went on for about 10 seconds then cut out - front panel LED screen going completely dead . I replaced the 20AMP fuse and the microwave powered up again. Turning the microwave on again, this time it powered off again this time within 3 seconds. I took the capacitor and diode to my local parts supply store to have those things tested - all ok according to the knowledgeable store folk - I bought a couple more 20 AMP fuses - to check it was not the new Megatron causing the problem - I unplugged that completely. Inserting a new fuse again and turning it on again , it again powered off again within 2-3 seconds blowing the fuse again . So I can rule out the Megatron, diode, capacitor here - what else could be causing this fuse to blow ? or should I give up and call a technician ?


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  #2 (permalink)  
Old 01-17-2013, 06:08 PM
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No response from anyone - well turns out the issue was the transformer.
So the possibility is that , that is what caused the magnetron to go originally.
Problem solved.
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Old 01-17-2013, 07:37 PM
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Aviator,
Here's a relatively quick test- unplug the power to the transformer that feeds the magnetron. Since they will be electrically live during the test, wrap them with electrical tape.
Then, invest another 20amp fuse as a test.
If it doesn't blow, the transformer is shorting out.

Last edited by Baudretsch : 01-17-2013 at 07:52 PM.
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