Diagnosis
The clock/control memory is losing power. This model does not have a backup battery. The main control board is not receiving continuous low voltage to maintain memory.
How to Fix It
This is almost always a blown 3-amp fuse on the main control board. The fuse protects the control circuit. Unplug the range. Access the main control board (usually behind the kickplate or back panel). Locate the small, clear 3-amp glass fuse on the board. Remove it and check for a broken filament. Replace it with an identical 3-amp, 250-volt, time-delay glass fuse.
If That Didn't Work
A faulty wiring connection between the power inlet and the control board could cause intermittent power loss. Check all terminal block connections are tight.
Heads Up
A blown fuse is a symptom. It often blows due to a momentary power surge. If the new fuse blows quickly, you have a deeper short circuit issue in the control system. Stop and call a technician.