Digi 20E-120 is 16Amp 120Volt flush mount digital timer with 20 or 140 programs per week.
Grasslin Digi (digi tal/ digital) can be reset using reset button.
Reset might restore functionality, but will delete all programming.
Check that circuit is delivering 120Volt and that circuit is clean without interference.
Also check electrical terminals fit tight on the timer.
Use needle nose pliers and pull terminals off and then push back.
The digi series has 5-day program back-up capacitor so programs should remain, but capacitors go bad.
Power surge can blow out timers. Use surge protection on all circuits.
There are a many Digi timers from years of manufacture by GE and now Intermatic, since Intermatic bought Grasslin from GE.
The digi can be replaced with simple-to--program FM1D digital timer.
Replacement crossover is FM1D20E-120
Open following link for FM1D manual and Digi manualhttp://waterheatertimer.org/Woods-timers-and-manuals.html#FM1D
Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.