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Registered Member #223
Joined: Mon Feb 20 2006, 06:42PM
Location: Ottawa, Ontario, Canada
Posts: 125
Well I took apart a microwave and I found a component I never seen before and I have taken apart quite a few microwaves in my time. It was located on top just outside the cooking cavity right by a vent screen. It looks like a small plate capacitor in the middle and a coil covered in white stuff around it. All of this has a cage around it. It was connected by four wires to the control board. The middle thing is looks like a capacitor since I measure infinite resistance and it literally looks like a thin piece of PCB with a connection soldered on each side of it. The wires that connect to what I think is the capacitor has some braided shielding around it while the coil wires are unshielded. I did not keep the control board because it would have taken too much work to remove it. It was welded inside of a shielding metal box and since it was almost garbage collection and I didn't want to keep the hunk o junk for another week. I'm guessing this is some sort of leakage sensor but how does it work? Why the inductor/capacitor combo?
Registered Member #223
Joined: Mon Feb 20 2006, 06:42PM
Location: Ottawa, Ontario, Canada
Posts: 125
Well I’m not sure if it’s a capacitor in the middle of it. It might be a moisture sensor as you said and once it's triggered must be reset by using the coil/heater to drive off the moister so it can return to its dry state. Never seen this sort of device in a microwave before.
Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
IIRC old microwaves used a low voltage controlled HV relay as the HV rectifier. maybe this is what you got. (in that case there would be no HV diode in the microwave)
Registered Member #10
Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
I have seen them and assumed they were airflow detectors. If I recall they have a filament and a ? heat sensor. If no airflow for what ever reason, the system needs to shut down.
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Odd component in a microwave
