642655 Genuine Microwave Magnetron for Bosch, Siemens, Neff Microwave Ovens, BSH Magnetron Part 00642655

The magnetron is the part that actually makes the microwaves, and 642655 is the genuine BSH magnetron for Bosch, Siemens and Neff microwave ovens. You may also see it listed as 00642655. Magnetrons differ in output, mounting and antenna style between models, so this number needs to match your parts list or the label on the old magnetron. Send your E-Nr through if you'd like a second check.

Microwave running but not heating

Inside the microwave, the magnetron turns high voltage power into microwave energy, which is channelled into the cavity to heat food. When it fails, everything else seems normal. The light comes on, the turntable spins and the fan runs, but food comes out cold. A weak magnetron can heat slowly or unevenly before it dies. Arcing, a burning smell or a loud hum can also point here, but the same symptoms can come from the high voltage diode, capacitor or a door switch, so the circuit should be tested before buying.

Part details

• Genuine BSH part 642655
• Also listed as 00642655
• Magnetron for Bosch, Siemens and Neff microwave ovens

Leave this one to a technician

Microwave repairs carry a real risk of electric shock. The high voltage capacitor can hold a lethal charge long after the plug is pulled, so magnetron replacement should only be done by a qualified appliance technician. Built-in models also need to be removed from the cabinetry. After fitting, the oven should be leakage tested before it goes back into use.

Questions about this part

Is it worth replacing the magnetron?

On built-in Bosch, Siemens and Neff microwaves it often is, because the rest of the unit and the cabinetry fit are usually fine. Have the fault confirmed first, as a diode or capacitor failure can look the same.