DIAGNOSIS: The range is losing power to its clock circuit. The most likely culprit is a loose or failing connection at the terminal block where the power cord attaches in the back.
FIX:
- Unplug the range.
- Remove the rear access panel (usually a few screws).
- Locate the terminal block where the power cord's three wires (black, white, green/red) connect.
- Check that all three terminal screws are very tight. Use a screwdriver to firmly snug them down. Do not overtighten.
- While you're there, inspect the wires for any signs of scorching, melting, or looseness.
- Replace the panel, plug in the range, and set the clock.
IF THAT DIDN'T WORK: The problem could be a faulty main control board that's not providing steady low voltage to the clock memory. This would require board replacement.
HEADS UP: If you see any burnt/melted plastic on the terminal block or wires, STOP. Do not use the range. This indicates a dangerous overheating issue that needs professional repair.