Top 20 Bosch HMV9305 Microwave Oven Questions & Answers

If you wish to get some details; check the site linked here. Pull up older posts. http://electro-medical.blogspot.com/

Hello, you need to take int microwave in to have repaired, you can get severly shocked if you touched the wrong thing inside the microwave.

Hi Testing magnetron is easy. However caution must be taken when doing the measurement in resistance. If less than 1 ohm than it is still good otherwise it is bad. Btw not all the time magnetron goes bad but it could be power diode or power capacitor too or sometimes it is a simple bad door switch therefore needs to check all conditions as you have access. Provided link below on how to test magnetron for future reference. http://www.microtechfactoryservice.com/mag_test.html

Most microwave manufactures do not sell parts to the public because if you open up a microwave oven and don't get it all back together exactly right, you could receive microwave burns or be blinded when you run it. Best to just take it to the recycling place and get a new one. Seriously, these things are extremely dangerous if you don't know what you are doing.

You probably have a shorted cook relay (see video), or possibly a bad door switch (see help file).

The area will first have to be sanded smooth and cleaned and dried thoroughly.Then you can apply some high-temperature appliance paint, available from places like Wal-Mart, Lowe's or Builder's Square. We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

proceed with this step and use the common sense: God bless youcan take some time. This is where you must be able to read a wiring diagram and do some "live" checks on parts. First easy check is to make sure power is coming off your control board at the MW relay. Make sure of the wires and test here, if you have 120 volts at this point, you have ruled out a lot of parts that could be the problem. You have now ruled out any switch problems, control board problems, or a thermostat or 2.If you do not have power from that MW relay on the control board, you must trace the wiring back to see if the proper voltage is going through your switches, any thermostats, and arriving at your control board. Your wiring diagram on your sheet will show you where and what to test. Below is a general switch test troubleshooting guide. If the proper voltage is coming into your control board and you are not getting voltage at the MW relay, then you need to replace the control board. If voltage is interupted by a thermostat or switch from your testing to the control board, then replace that part.Now, testing from the MW relay on to your transformer, high voltage capacitor, magnetron, and diode. Do not do any voltage reading from the secondary side of the transformer on, this can be a deadly microwave oven repair if you do not follow directions. This can result in electrocution and the "blowing-up" of your voltmeter, only do OHM testing with the power off and the capacitor discharged. Someplace in this circuit, usually before the transformer, you will have another thermostat to test. It is usually mounted on the magnetron. Do a quick OHM test to see if it is open or closed.Now to test either the transformer, high voltage capicitor, magnetron, and diode, you must test each part separately. A good rule of thumb, if your capacitor is bad, change the diode also. Another note, if you are working on an OTR model and you have determined to be one of these "heating" circuit parts, you can not test these parts until you take the unit down. If you don't have the parts with you and you have to order them, order the magnetron, capacitor and diode and you will have a 90% chance of solving the problem. If it is an older microwave, order the thermostat also, most times you can return un-used, un-opened parts. Check with your parts supplier. This way you only have to take the unit down once.To test these parts, scroll down this page and you will see a chart with component tests. Follow the instructions to find which part(s) are defective in your microwave oven repair.

From the description you have a bad latch switch on the door caused by build up of food particles or ware.

The most likely cause is a defective door latch switch.

With all due respect, what are you doing to it?
If you use it with nothing in the cavity, that will kill the magnetron otherwise it will last for years and years.
Very unusual and Bosch is a well respected name.
If there is a probem with the oven, Bosch will replace it so take it up with Bosch.

The exhaust fan appears to intake through a louvered vent in the bottom rear of the microwave case and output through a grease filter near the top front center of the case. You may be able to see some vent holes along the top of the case though these might be obscured by the manner in which the microwave was installed. You should be able to pop off the front panel that runs above the door but you'll need to consult the owners manual for specific instuctions.

Cheers.

The main microwave element has more than likely fried or the main capacitor to the element went bad. Had the same problem with a Bosch model. Not your exact one though. When it comes to fixing it yourself. You would Have to buy the element and take apart the whole unit. Its not an easy task to complete. The part might be hard to find online. The best option is to go out and grab a new one. A service tech would fix it but it would cost you around 200$ in labor and 65$ in parts plus possibly take 2 weeks if they do not have the part in stock. Good luck.

Hi,
If it's not heating it is most likely a problem with the magnetron. When was this unit purchased and was it purchased new? If it is under warranty I would have it repaired under warranty. If not you will have to consider repair/replacement.
Thanks,
Lee

Hi

Please check if any fuse is blown inside the microwave. If the fuses are fine then the issue is with the Magnetron of the microwave, it may be faulty or may have loose connections. If the Magnetron is faulty then you can get it replaced. Hope this helps...please post back for further assistance.

Daniel

If one of the door interlock switches is not switching properly, that can cause the turntable/light to come on eventhough the "Starts" button has not been depressed due to the wiring of the switches.
Check for faulty door switches and/or contaminated actuators.
I hope that helps.

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

djh

The HMV9305 has an automatic vent turn-on feature. It senses heat, possibly from the oven or range beneath, and turns on the exhaust fan until temps return to normal. Sometimes this may take 4-5 minutes, which can seem like an eternity of listening to the blower run, but it is a safety feature designed to prevent damage to the microwave from excessive heat generated by the cooktop or oven beneath it.

Sounds like you blew the fuse. I have a tip at http://www.fixya.com/support/r4223574-microwave_oven_will_not_heat which explains the problem, how to correct it and where to get any parts. Let me know if you need more help.

hardrocko

Thanks for using FixYa and for the generous rating.

Hi, if your microwave oven does not heat/defrost. then the magnetron has failed and got spoilt.

I will advice you to contact Bosch to find their nearest authorized service center.

If it's less than one year old, it should be fully covered under warranty. I'd suggest contacting the manufacturer to get it fixed free.

If it's within the magnetron portion of the warranty (usually 5-9 years) but out of the original full warranty (usually 1 year), then your manufacturer will cover the part cost, but not the cost to visit you or the labor charge to do the work.

Take care