Open following link to identify timer and read instructions:http://waterheatertimer.org/How-to-program-Utilitec-0155671.html
Timers go bad for many unprovoked reasons.
Check outlet with circuit analyzer.
This timer has 1 year limited warranty.
Extended warranty: If timer is defective, then buy new one from Target or Lowes, and return defective timer in new package.
Replace AA battery if this model has a battery carriage. Otherwise timer has internal rechargeable battery.
Press reset button with paper clip for a few seconds.
88:88-88 will flash on screen momentarily, and then 12:00 am will display. Timer is ready for programming.
If 88:88-88 does not roll over into the 12:00 am display, try resetting again.
If timer will not hold new programming, and keeps resetting, then see if reset button is stuck.
If timer does not reset and re-program correctly, then timer has gone bad.
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