Microwave runs for a few seconds then shuts off and resets or returns to clock; may or may not heat during that time.

Safety: Unplug the unit before servicing.

• Door test: Gently press up and down on the door while running a short cook cycle. If the unit cuts out when the door is moved, door switches or latch alignment are suspect.
• Inspect door switches: Access the door switch assembly and check for loose brackets, burned terminals, or worn actuators. Replace any suspect Viking door switches and tighten the bracket.
• Ventilation: Ensure vents are clear and that the cooling fan runs. Overheating can trip thermal cutouts and shut the unit down.
• Professional diagnosis: If the unit shuts down with a loud hum or burning smell, the magnetron or HV components may be failing and should be checked by a technician.