Magnetron detection method: 1. Test between the magnetron filament terminals, the resistance value should be less than 1Ω; 2. In any filament terminal and magnetron (grounded, tested), the resistance value should be infinite; if the resistance is small or zero, then the magnetron should be replaced. Read the follwing tips before you repair magnetron 1.Please shut down power supply and use electrical meter to conform high voltage has been released before you replace it. Safe is first. 2.Not include install screws and thermostat, so remove your old magnetron and keep remain your original screws and thermostat, reused for new magnetron. 3.Microwave no heat, there are many root cause, please check high voltage capacitor, hv diode and fuses first,Final check magnetron. 4.Microwave magnetrons are similar to each other if power is similar or near and install hole meets. They can be replaced with each other. 5.Small home microwave power is about 750 - 900 Watts, most home microwave power is about 1 kWatts. 6. Replace general 900 Watts home microwave magnetron for you and save your time. Package Contents: 1 * Magnetron Outline Dimensions:79x94x124 mm/3.1x3.7x4.9in(WxHxT) Net Weight:900 g/1.98Lb