Timer is not identified.
If digital timer does not function as before, try resetting timer and then re-program.
If timer has battery, then change battery and reset timer.
If reset does not restore functionality, then timer has gone bad. Most in-wall timers have 1 year limited warranty.
Below are common 7-day timers, but there are many different brands:
You posted under Woods 7-day timer: except Woods timer does not astronomic dawn dusk function. Woods 7-day is same as Tork 7-day and GE 7-day, and they do not have astronomic function.
http://waterheatertimer.org/pdf/Woods-59018-59028.pdfhttp://waterheatertimer.org/Woods-timers-and-manuals.html#59028Reset button is small round button.
Push in reset with toothpick or paper clip.
Then reprogram timer.
If you have Intermatic ST01C or EJ500 battery operated timer: Replace battery, then to reset timer: push-and-hold ON_OFF button, and then push reset button. Keep holding on-off button until display changes. Release on-off button and display will flash 12:00. Then reprogram timer.
http://waterheatertimer.org/Intermatic-timers-and-manuals.htmlIf you have Utilitec astronomic timer, then press reset button and reprogram:
http://waterheatertimer.org/Program-wire-Utilitec-LW60419.html
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