Samsung microwave magnetron turns on whenever door is closed. Fan and lights turn off according to timer but magnetron stays on till door is opened. Must open door or unplug to stop cooking.

William Miller

• 9179 Answers
• Posted on Jan 23, 2009

SOURCE: GE microwave Turnable turns on opening the door

Thanks for the photo of the label!

It shows the FCC ID number, which I used to find schematics at the FCC Web site.

The problem is a shorted primary interlock switch.

This is the door switch which has two black wires connected to one terminal and a black and a blue wire connected to the other
terminal.

See these files for help:

http://www.microwavedisplay.com/safety.txt
http://www.microwavedisplay.com/disassembly.txt
http://www.microwavedisplay.com/doorsw.txt

You can usually find helpful exploded view diagrams and order parts by entering your full model number here.

If a switch is all you need, we offer a universal type for only $5 postpaid which you can order here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William Miller

• 9179 Answers
• Posted on Jan 31, 2009

SOURCE: GE Advantium 120 Microwave fan stays on, off only when door open

Looking at the schematic in the service manual here, I would say relay RY6 on the small sub PCB (relay board) has shorted contacts.

That's the relay that runs both the fan and turntable.

It's possible that it may be a bad connection or driving component on that board, but in my experience, it's virtually always a stuck relay.

The part number on the relay as shown in the photo is hard to read, but it looks like "OJ-SH-112LM".

I should have one of these or I can point you to one if you want to contact me with the exact number.

Feel free to contact me directly (and please remind me of your full model number) for more information & help.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

William E. Miller
[email protected]
http://www.microwavedisplay.com