Microwave intermittently stops heating during cooking, then resumes or restarts

Safety: Unplug the microwave before any inspection. High-voltage components must only be serviced by professionals.

• Ventilation check: Ensure vents are clear and filters (if present) are clean to prevent overheating.
• Observe pattern: Note if the stopping occurs after several minutes of use, suggesting thermal protection activation.
• Door test: Gently press on the door during operation (without blocking vents). If heating cuts out when the door is moved, a door switch or latch issue is likely.
• Stop using if frequent: Repeated cycling can damage the magnetron. Arrange for professional service to inspect thermostats, switches, and HV components.