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1) What portion of the kitchen circuit is not working? Lighting or the kitchen countertop receptacles or both?
2) Does your main electrical panel contain individual fuses or circuit breakers? How many amps is the fuse or circuit breaker that is having the problem?
Thanks for confirming.
1) Most likely the microwave is causing an overload on the circuit as these small appliances can easily consume 1500 watts or more. If the fridge compressor motor kicks in simultaneously while the microwave i running, then a good chance the fuse may blow. If any additional small appliances such as a coffee maker or electric blender are also simultaneously plugged into the same circuit, then even a higher probability the fuse will blow and overload.
2) Microwave ovens are always recommended to reside on their own dedicated circuit, preferably a 20 amp circuit.
3) A 15 amp circuit should not be loaded greater than 1,440 watts or 12 amps.
4) I recommend to temporarily relocate the microwave oven to another circuit and see if this circuit fuse still blows when the microwave is not connected there.
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Hi, I'm Mike G and I'll be assisting you. The previous expert is correct as far as the equipment you have on the circuit. You might try using a DETD fuse as a replacement and see if the circuit holds when in use.