Microwave displays E7 and will not start; interior light may come on but no heating or rotation.

Safety warning: Unplug the microwave before any disassembly. Do not operate the unit with the cabinet removed.

Steps to address E7:

• 1. Check door closure: Ensure the door closes fully and evenly. Look for warped door, bent hinges, or obstructions on the door seal area.
• 2. Listen for clicks: Slowly open and close the door while listening for distinct clicks from the interlock switches. A missing click may indicate a failed or misaligned switch.
• 3. Access interlock assembly: Remove the outer cabinet and locate the door switch cluster (primary, secondary, and monitor switches) on the latch side.
• 4. Test monitor switch: Disconnect wires and test the monitor switch with a multimeter. It should be closed when the door is open and open when the door is closed (opposite of the primary switch). Replace if it does not change state correctly.
• 5. Inspect wiring: Check for burnt, pinched, or shorted wires around the interlock assembly. Repair or replace as needed.
• 6. Reassemble and test: After replacing any faulty switch, reassemble the cabinet, plug in, and test. If E7 persists, the control board door-sense circuit may be defective and should be replaced by a technician.