Good Sam Club Open Roads Forum: Tech Issues: Dometic microwave no START


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joebedford

Home for the summer.

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Joined: 09/03/2003

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Posted: 11/14/22 06:50am

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Thanks for the suggestions.

Didn't see any fuses but I can put my meter on the door switches.

I realize Dometic / LG doesn't have the best reputation but it worked fine for 11 years. I'm not going to fool with the microwave generator - my life is worth to much (to me anyway) but that appears to be working (there's a combination of buttons that will start it in a useless way (but it works) - just not with the start button.

Incidentally, if the microwave works in this 'odd mode' I'm guessing that means the door switches are working.

Do you think the refurb LG board on ebay is compatible?

1995brave

San Antonio, TX

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Posted: 11/14/22 06:51am

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Years ago had a microwave that did the same thing. Found it was the microswitch for the door. They used a cheap 1 amp switch that the contacts burned. Replaced it with a 5 amp unit and the microwave is still working today. So that one dollar microswitch killed an expensive microwave.

Joe417

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Posted: 11/15/22 10:52am

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Could it be just the key pad??

Joe & Evelyn

MEXICOWANDERER

las peñas, michoacan, mexico

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Posted: 11/15/22 11:34am

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I would tend to take another look to find a 15 amp slo blo fuse.

joebedford

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Posted: 11/15/22 06:28pm

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MEXICOWANDERER wrote:

I would tend to take another look to find a 15 amp slo blo fuse.

Even though the microwave works in a non-useful way?

joebedford

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Posted: 11/20/22 01:28pm

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OP here: guess what? - we bought a spare microwave for $70.

Of course, today the built in OTR works! ARGHHHHHHHhhhhh

MEXICOWANDERER

las peñas, michoacan, mexico

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Posted: 11/20/22 02:01pm

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When Chinese are tasked with circuit design, standardization goes out the window. I've encountered units that devoted only part of a control circuit to a control circuit fuse. A turntable operated by a control circuit fuse. Keypad lighting with the power fuse. When I had oodles of time and electronics I remade m commercial LG circuit boards using better transistors, higher voltage capacitors using a hot air gun.
I also sealed the board using 3M sealant. The unit is alive and well a hundred feet from cashing tropical Pacific Ocean waves, nine years later.

joebedford

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Posted: 11/20/22 08:09pm

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I wish I had your skills.

The microwave started to NOT work later this afternoon.

I'm guessing that I need to replace the control board but where to find it?