Shows F3 in the screen
SOURCE: Trouble shoot
F3 indicates a failure of the keypad.
The first thing to try is a "hard reset". Unplug it from the power line for a few minutes, plug it back in, set the clock, then try again.
If that doesn't take care of it, you'll need a new keypad, and this is not too hard for a DIYer.
We have critical safety, disassembly, and troubleshooting info at our site. You'll find a link to our site in our listing here on FixYa: http://tinyurl.com/yzjozk
You can find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383
There should also be a very helpful "mini-manual" hidden inside the unit behind the control panel. It's very helpful when troubleshooting.
We're happy to help and we appreciate your thoughtful rating of our answer.
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