The
first thing I would suggest is a hard reset. Unplug the unit for a
minute or so. Then plug it back in, set the clock and try again.
If that doesn't work, leave it unplugged for maybe an hour.
Otherwise, it sounds like your "defrost" key on the keypad may be shorting.
If you (or someone you know) might want to replace it yourself, I have uploaded a
handy guide with pictures showing you what's typically involved.
In the UK, you can find Sanyo support, parts and authorized servicers
here.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
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