Question about Miele H147MB Convection/Microwave Oven

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Fuse breaks when microwave is switched on - Miele H147MB Convection/Microwave Oven

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Microwave goes on but doesnt heat any thing

Posted on Aug 13, 2009

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You will probably find that the fuse blowing is due to door switch adjustments, most unit have 3 switches 2 on the door catches and one that is crowbar protection. the 2 door catch switches are normally closed with the door open and the crowbar is the opposite. if they do not change at the correct time when closing nthe door the fuse blows

Posted on Feb 21, 2009

  • phillipe lys Feb 21, 2009

    are you say that the door is closed and as soon as you apply mains power the fuse blows

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Tell me how this apprentice's comment could possibly qualify as the best solution? !!!!

Posted on Mar 06, 2010

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Hi have a sanyo c1901 microwave and keeps blowing internal fuse could this be of the interlock switch on the door mech Thanks steve


UNPLUG UNIT !t and break out the VOM check to see if the Micro switches work as they should... N.O. or N.C. contact diagram on side of switch, but you have to remove it to see them.. also a shorted diode or transformer or the large capacitor can take out the fuse in a heartbeat ground out the cap before working on unit.. when it hits it hurts and you could cut yourself when you pull your hand out of the microwave really fast when it pops !

Nov 25, 2015 | Sanyo Microwave Ovens

1 Answer

I used my sharp R-1821 convection microwave that night it did not work. outlet is lit up but display does not come on. Why?


More than likely it will be one of the three door switches. Also check the internal fuse in the unit. The fuse if blown is just a symptom, not the problem. It doesn't always blow out but the right combination of switches bad will take it out.

Dec 03, 2014 | Sharp Microwave Ovens

1 Answer

Fuse is blowing of


door (micro)switch is bad... 8 bucks each replace them both

Apr 07, 2014 | Kenmore 63792 Microwave Oven

1 Answer

Mbbs 01 thermador micro oven: timer counts down, lights go on, but no heat, no fan and turntable does not turn. is it a fuse?


Key clue is table does not move---All microwaves with a table have a lever switch that is engaged when door closes--only can get at from inside the unit----it prevents the unit from operation if door not closed.

What happens from closing door a lot is the switch with a lever arm can come loose or even if snapped into a plastic holder break out of the holder.

IF this it is not too expensive a repair.

Jun 16, 2012 | Thermador MBBS Microwave Oven

1 Answer

Microwave oven dead


Check the fuse in the microwave it is probably open, unplug and remove the top, follow the leads from the keyboard to the circuit board, look for a silver rectangular capacitor, short out the two pins to remove any high voltage, now look for a small fuse that is clipped in, pop it out and check if open, replace with same current rating. The door switches in most cases cause the fuse to blow, normally one switch is defective.

Mar 17, 2012 | Panasonic Microwave Ovens

1 Answer

I have just got this microwave.. and it runs quietly and smooth.. but will not heat food or water. I exchanged the fuse and the big silver capacitor that was in my old microwave that was working, ( they...


There are three or four door switches that rely on catches to make them make or break contact. Are the switch actuators on the side of the door still OK? If they are then the magnetron is not coming on and may need replacing.
Hope this helps.

Oct 16, 2010 | GE Spacemaker JVM1540 Microwave Oven

1 Answer

Door was not closing right so i was measing with the uper switch now i have lost all of the power to the microwave. Is the switch bad or did i break the entire thing


you messed up the safety interlok switch on the door by adjusting it, that is to blow the internal fuse in the event the door is opened during operation,you need to re-adjust the door safety interlok switch,then replace the fuse and you should be back on track and running

Mar 05, 2010 | Whirlpool MH7140XF Microwave Oven

1 Answer

How can u tell which switch is bad on the frigidare microwave


the door switches almost never break it sounds more like no power check the fuses on the pc bords

May 15, 2009 | Frigidaire FMV156DC Microwave Oven

3 Answers

Microwave stopped working all of a sudden. NO power supply. I tried placing at different places.But no use..I ddidn't see any problem before it stopped working..


the most common problem with microwaves is the door protection circuit blows a fuse. the door catches operate switch that if they do not operate correctly( normally after the door has been slammed). the good part is they place the fuse inside the casing. so remove the power open the casing( several screws) and check all the fuses in side.

Feb 19, 2009 | Emerson MW8102SS 1100 Watts Microwave Oven

2 Answers

Microwave will not heat


Check the internal fuse. Unplug it, unscrew and take off the cover, the fuse should be easily found in the back by the power cord. It looks like a regular fuse but is white instead of clear glass because microwave fuses are special. You'll have to measure it with a meter as a result and be sure to replace it with the same kind. (try finding them at radio shack) Hopefully there isn't something more serious also. The high-voltage parts the (high-voltage capacitor and diode) are suspect. These parts start to break down due to the stress on them and draw more current. The excess current will usually make the transformer noisy until it gets to where it blows the fuse.
Hope ya fix it!

Feb 11, 2008 | Sharp R-320H Microwave Oven

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