Question posted under Intermatic ST01C, but Timer is not 100% identified
since ST01C is battery powered, and should not lose programming or stop working with
ordinary power outage.
Most digital timers have a battery or capacitor back-up for power outage.
Add a comment with description of timer buttons, or open link below to see most brands of in-wall timer.
Open following link for to identify Intermatic ST01C and Ei600 and download instructions:
http://waterheatertimer.org/ST01C-program.html#battery
ST01C timer has a battery backup. Power outage will NOT cause battery-powered display to fail, but power
outage and power surge can cause any electronic timer to fail.
So either the battery went dead, or power surge ruined timer, or you don't have ST01C timer.
If ST01c display is not showing, then replace battery and then reprogram
current time -or- manually re-set timer and then reprogram timer.
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