Why Samsung M540 can program but timer does not start?
- NNoah CaldwellSep 9, 2025
If your Samsung Microwave Oven can be programmed, but the timer doesn't start, the issue might be: * Open or loose wiring of the secondary interlock switch. * Misalignment of the primary interlock. * A defective secondary interlock switch. Adjust the door and interlock switches.












