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There must be a short in the system somewhere that causes the fuse to blow.
Only if you want to blow up the microwave. That will let 20 amps go through before the fuse blows when the manufacture is telling you 18 amps max. <<>> Yes, you can use the 20 amp fuse. At 250 volts 2 amps is no problem and you are not going to blow up the microwave. On a fault current the 20 amp fuse will trip just as fast as an 18 amp fuse.
The fuse is there to protect the wiring in your home not the microwave. Using a larger fuse than required for the wiring causes a fire hazard. You can end up burning your home down. Use only the fuse recommended.
A microwave fuse does what any fuse does. It protects both the microwave and the building's electrical from surges and short-outs.
This is the starter fuse I am talking about. It doesn't blow every time. It might go weeks before it blows again.
to many plugs in at once or old circuits ECT.
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Ck the heater fan motor resistor .
A microwave fuse does what any fuse does. It protects both the microwave and the building's electrical from surges and short-outs.
Need to know which 20 Amp fuse is blowing.
no A FRN fuse is a slow blow fuse where an non is a fast blow fuse. In a pinch a slow blow fuse can be use in a fast blow circuit but not the other way around.
short circuit in the circuit