Question about Bosch HMT8656GB Microwave Oven
If the power Circuit Breaker is tripping, then it is not necessarily be the LV nor the HV circuitry that is the culprit.. It could possibly be an Earth leakage. I suggest check the Carousel Motor for Earth leakage. (also the Fan motor). The Power Fuse (in the MW) ought to blow if there is a problem with the LV or HV circuit.
Otherwise, the Inverter Board need to be repaired or replaced.
Posted on Oct 07, 2014
Confirm that the receptacle where the microwave is plugged in is not faulty by plugging something else in the recepticle and seeing if it works or if the fuse blows. Check the power cord of the microwave for broken, frayed wires. Also check the bulb socket for broken wires. It may or may not be worth the cost of repair, depending on the repair cost verses a new microwave. There are repair parts available.
Posted on May 08, 2014
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Posted on Jan 02, 2017
SOURCE: Hi there, I have a
This indicates one of three things, there is a short in the magnetron, or high voltage diode , or the high voltage capacitor. Now! the other possible situation is the door switch has become defective and this would apply when you first plug in the microwave oven, either way it needs to be checked and depending on parts and labor the cost could come close to a replacement.
Posted on Feb 28, 2011
see the next steps: use the common sense and VOM
1. No power to outlet (overload or fault in microwave or other appliance).
2. Blown main fuse - likely due to other problems.
3. Open thermal protector or thermal fuse.
4. Defective controller or its power supply.
5. Clock needs to be set before other functions will operate (some models).
Posted on Aug 01, 2012
Tips for a great answer:
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There is a dead short in side the microwave... this is causing the breaker to trip...however you should also replace the breaker to the microwave, as that should trip before the MCB...unless both are tripping at the same time...
Here is a tip that will help you to figure out what is wrong with your Microwave Oven....
Microwave Oven Basic Troubleshooting Tips
May 12, 2011 | Westinghouse WST3504 Microwave Oven
It sounds like the magnetron may have
either failed or is not being supplied with the extremely high
voltage required to run it.
SAFETY IS PARAMOUNT
This is a job for a professional but if
you are safety clued up, here's instruction.
Make sure the !!!!any capacitors are discharged!!!!! before attempting any sort of repair.
Check the door interlock switches first then the high voltage diode with either an AVO model 8 or moving coil meter on high resistance range for short circuit, (DVM's won't show the fault!), the capacitor can fail and go short circuit, the feed fuse on the primary of the high voltage transformer and then finally, the magnetron is best checked by substitution.
Hope that helps.
Mar 07, 2011 | Bosch HMT8656GB Microwave Oven
Feb 25, 2011 | Bosch HMT8656GB Microwave Oven
Replacement of the
turntable motor should be carried out by a qualified appliance repair
SAFETY IS PARAMOUNT!
this only if you are competent.
But here is a basic method if you are
mechanically minded and have electrical safety knowledge.
I am assuming the plastic coupler is
not split or broken and causing the problem.
The motor assembly is fixed to the base
of the oven usually with two screws and access is obtained usually by
removing the inspection plate directly beneath the motor. It is
usually a plug in synchronous motor that revolves at a few revs per
minute but the plastic cogs in the motors gear box fail and the motor
assembly must be replaced. They are fairly inexpensive and obtainable
usually from a domestic appliance repair shop.
If you feel confident, disconnect it from the mains power, remove anything in the cavity and turn it upside down if it is a tabletop model, a little more complicated if it is built in!
Remove the inspection plate, sometimes it must be cut out with sharp cutters, and disconnect the motor. Remove the motor and go and get a new one. Fit the new motor and fit the inspection cover back on the base by turning it to fit and using an extra screw fix it then put the microwave back in its position. Plug it back in, with the turntable and plate. Put a cup of water on the plate inside of the oven and heat for 20 seconds to check the plate goes round.
Hope this helps.
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