Microwave beeps and shows E2; oven light and fan may run but food does not heat.

Safety first: Unplug the microwave. Internal components can store high voltage; do not touch the capacitor or magnetron connections.

Basic user checks:

• Allow full cool-down: Leave the door open and let the unit cool for at least 30–45 minutes. Sometimes an overheated thermostat will reset when cooled.
• Check ventilation: Ensure the side, rear, and top vents are not blocked by cabinets, walls, or items stacked on top. Farberware countertop microwaves need several inches of clearance around vents.
• Clean intake/exhaust vents: Use a soft brush or vacuum to remove dust and grease from the vents to improve airflow.

Advanced checks (technician-level):

• Remove the outer cover and locate the cavity thermostat and magnetron thermal cutout (usually clipped to the cavity or magnetron). Test for continuity with a multimeter. Replace any thermostat that is open when at room temperature.
• Inspect wiring harness connectors to the thermostats and control board for discoloration or loose fit.

If E2 returns immediately after cool-down and vent cleaning, the thermal protection components or control board likely need replacement by a professional.