Microwave briefly shows Err or Error on the display and cancels the program

Safety first: Disconnect from mains before removing covers.

• 1. Power cycle: Unplug the microwave for at least 5 minutes to allow the control electronics to fully reset. Plug back in and set the clock, then test basic heating.
• 2. Check power quality: Avoid using the microwave on the same circuit as heavy appliances that cause voltage dips. Plug directly into a wall outlet.
• 3. Inspect control connections (advanced): With the unit unplugged, remove the outer cover and inspect the main control PCB. Ensure all wiring harnesses and connectors are firmly seated. Look for burnt components or cracked solder joints.
• 4. If Err recurs frequently: The control PCB may be failing. Replacement with a compatible Russell Hobbs control module is recommended via a professional service center.