Question about Miele Built In Microwave M82601 900 Watts Microwave Oven
If the microwave is working but not heating, then the problem is often the magnetron (the wave emitter), but there are more parts that can commonly give the same problem not powering the magnetron.
Before replacing the magnetron there is need to test the high voltage capacitor,the rectifier diode and the wiring. Such parts are easier to test than the magnetron. If all this are fine, then the control board must also be checked .If turntable is not running the door switch must be tested as well.
The diode and capacitors can be tested using a tool with diode tester and cap meter. The capacitor must be allowed discharge before testing, or you risk to get electrocuted. Even if power is off a big electrolytic capacitor like the one on the MW can release a big discharge.Capacitors can get discharged by shorting their two contacts.
Before replacing the magnetron test also the control board.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.
All locations, and description of this parts can be located using the general diagram here: Counter top.
Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed after the oven is serviced or repaired.
Call the Miele number listed on your owner manual to get a quote from a qualified repairer.
Posted on Apr 09, 2011
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Posted on Jan 02, 2017
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