How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Kelly Your Own Question
Kelly
Kelly, Appliance Technician
Category: Australia Whitegoods
Satisfied Customers: 22915
Experience:  Highly accurate diagnostician with over 30 years of experience.
11418111
Type Your Australia Whitegoods Question Here...
Kelly is online now
A new question is answered every 9 seconds

I have a Miele 4020BM microwave. Since last evening,

Customer Question

Hi I have a Miele 4020BM microwave. Since last evening, whenever I set the oven control knob to Microwave the magnetron comes on immediately and won't turn off. I can set the timer to 20 secs and it will count down as usual, but the magnetron does not stop at the end of the timed period. I can change the power but it seems to have no effect as the magnetron stay permanently on as if at full power (1000w). The only way to turn off the magnetron is to set the control knob to a non-microwave setting or open the door. Any ideas? Sounds like a switch has fused on or similar...:(
Submitted: 2 years ago.
Category: Australia Whitegoods
Expert:  Kelly replied 2 years ago.

Hi, welcome to Just Answer. My name is ***** ***** I look forward to helping you! The relay on the main control has welded contacts. The control board will need to be replaced. This can be dangerous, so I would advise you to unplug the unit or switch off at the mains until repaired. Also, high voltage repairs in microwaves can be dangerous, even with the power off, due to the storage capacity of the large capacitor used in the appliance. If you are not familiar with microwave repair, I would strongly recommend having it professionally repaired.