Dishwasher tripping certain circuits but not others

[Ffschooley]

In the process of a kitchen remodel. I have a dedicated 20 amp circuit for the dishwasher and a dedicated 20 amp circuit for the garbage disposal, both under my sink. They are protected by AFCI breakers. I plugged in our (6 year old) dishwasher that had been sitting outside for a while to its circuit and as soon as it started it tripped the circuit. Tried again and same thing. I plugged it into the garbage disposal's circuit and the same thing happened. I then took an extension cord and plugged the dishwasher into one of the kitchen small appliance circuits (20 amp, GFCI breaker) and it works fine.


I plugged a shop vac into the dishwasher circuit and it worked fine, as did the garbage disposal on both circuits.


I then swapped out the AFCI breaker on the dishwasher circuit with a GFCI thinking that was the problem and the same thing kept happening.


Any idea whats going on and/or how I should proceed figuring this out

 

[Dennis Alwon]

Sounds like you have a bad dishwasher. However----

 

[Dennis Alwon]

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