"F3" means you have a shorting membrane keypad.
I regularly repair these controllers and details are here.
If you have other questions, it's best to follow up with me directly.
(FixYa does not notify us directly when follow-ups are posted, so we have to log in to the site to see them.)
- William E. Miller, AS-EET
[email protected]
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"
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