Frigidaire Microwave FGMV176NTF blows breaker

[Cmerrill]

Model Number

FGMV176NTF

Brand

Frigidaire

Age

1-5 years

So it happened twice the past week if I opened the door with the microwave running it blew a breaker. Now it will blow anytime you hit start and try to use it.

 

[rickgburton]

Sounds like a bad interlock switch. Check it for continuity by opening and closing the door.

Frigidaire 5304509459 Switch - AppliancePartsPros.com

SWITCH 5304509459 / AP6230614 made by Frigidaire

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[Cmerrill]

I’ll give that a shot thanks. Hopefully not too hard to get to.

 

[rickgburton]

It's not.

 

[Cmerrill]

It's not.

Is it the center one?

 

[rickgburton]

Probably. It's a normally closed switch but you should check all of them. Remember to remove at least one wire when checking continuity

 

[Cmerrill]

Ok so after purchasing the above part there is an improvement. The microwave will now operate instead of blowing a breaker when you hit start. However, it still blows a breaker when opening the door while operating. You have to wait until it’s done to open the door.
odd because I tested continuity of all the switches and replaced the one that had no change operating the switch. It was the middle one.

 

[rickgburton]

It was the middle one.

That's called the monitor switch, sometimes called the "dead man" switch. It's purpose is to keep the microwave from running with the door open by shorting L1 and Neutral together. When you open the door L1 to the monitor switch is interrupted by the primary switch. The primary switch needs to open just ahead of the monitor switch. That's the reason you need to test the switches by opening and closing the door. The bracket that holds the switches could be worn out or out of adjustment. There's very little adjustment but you can loosen the screws and push the bracket in place the tighten the screws.

 

[Cmerrill]

Yeah now the monitor switch ( the one I replaced and the one you have constant access to) is constantly depressed. I can try pushing it with a screw driver and it’s in the constant down position.
The last one did this. Even with the microwave unplugged. Which is why I replaced it. It would not reset.

 

[rickgburton]

it’s in the constant down position.

It's bad. Replace it.

 

[Cmerrill]

It's bad. Replace it.

That’s the one I just bought and replaced already from the start of the thread.

 

[rickgburton]

OK, if the microswitch button is pushed in and stuck in that position, the switch is bad.

 

[Cmerrill]

Well there has to be something else going on too right? When I initially replaced it the microwave would work but blow a fuse upon opening the door. I’m wondering if I should replace all the switches. Also thinking this would should be replaced no charge since it was just purchased. What’s your thoughts?

 

[rickgburton]

Did you get it from Appliance Parts Pro? Ask them. I'm sure they will replace it for you.

 

[Cmerrill]

Did you get it from Appliance Parts Pro? Ask them. I'm sure they will replace it for you.

Did you get it from Appliance Parts Pro? Ask them. I'm sure they will replace it for you.

I did. Do you know what the other two switches are? This one is the one in the middle. The one you can activate without taking the microwave apart. I’m assuming the two are different part numbers? Is that right?

 

[rickgburton]

Primary and secondary switch

Frigidaire 5304509460 Switch - AppliancePartsPros.com

SWITCH 5304509460 / AP6230615 made by Frigidaire

click.linksynergy.com