Question about Bosch Microwave Ovens

Open Question

Hi, Bosch M/wave HMT 845KGB/01 (FD8007). Every thing works except the important bit, it doesn't heat up anything? Any ideas? Also. if I need to take it out of the fitting how do you remove the surround fitting kit? Thanks. Pete.

Posted by on


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 9086 Answers

SOURCE: Black, Builtin, trim kit, metal box behind trim kit around oven for ventiliation

I would suspect a shorted high voltage rectifier diode or defective magnetron, in that order.

The diode is a pretty easy fix, and the magnetron is more involved, but not too bad for a DIYer.

You can find helpful exploded view diagrams and order parts by entering your full model number here.

Thereshould also be a "mini-manual" (tech sheet) hidden inside the unit behind thecontrol panel or hidden on the left side behind the grille, which isvery helpful when troubleshooting, testing, and locating components.

Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first: (if it is NOT shorted, it's probably fine) (continuity can be good even though it is bad!)

If you have to replace the magnetron, you'll need to take the oven down from the wall.

You can download GE owner's manuals and installation instructions here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Nov 21, 2008

  • 3 Answers

SOURCE: Goldastar MV1502W/01 will not heat

You can find the manual here:

Posted on Sep 03, 2009

  • 1 Answer


There's a spring in the door which is hanging on 2 plastic sticks which probably have been broken.
Seems to be same problem as

Posted on Dec 30, 2010

  • 6771 Answers

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

  • 9086 Answers

SOURCE: Our G E XL1800 micro wave doesn't heat

Since you didn't mention the model number, I have to be kind of general.

We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.

If it's quieter than usual (like the fan is not coming on) then it's likely a bad door switch or door switch mount or possibly a bad relay or connection no the control board, which we repair.

If it's louder than usual, that's usually a problem in one of the high voltage parts.

A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Oct 06, 2011

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Bosch innowave hmt 8625GB My Bosch start button no longer works . When you push it in, it just moves to the left or right ... Can anyone please advise .. Thx Adam It is about 10 years old , not sure...

There are no spares listed for the power button. You may want to see if it came loose as opposed to broke. That means take it apart. However, that unit is not made anymore.

Dec 02, 2013 | Microwave Ovens

2 Answers

My Bosch microwave (E no: HMT AU/01) is approximately two years old and has ceased to function! There is power - when set on, say, 1000w for 1 minute, it will activate. All will appear and sound normal and...

this is a internal protection mechanism which turns the device off incase a problem is detected. you will have to take it to a tech for a inspection as we can't really do that over the internet.

Jul 09, 2008 | Bosch Microwave Ovens

1 Answer

Bosch hmt 845k microwave oven

If for some reason you don't still have the installation instructions, their support site should allow you to either download or order a set.
If you can't find their site, try the dealer from whom you purchased the oven.

Jun 09, 2013 | Microwave Ovens

1 Answer


Here`s a little fact about microwave`s, they are not healthy -

We threw ours out, food taste much better cooked on the stove, oven or grill.

Apr 15, 2011 | Bosch HMT8625GB Microwave Oven

2 Answers

The microwave turns off after about 30 seconds. It does not seem to heat at all for the 30 seconds that it is on. Electricity stays on as you can still see the time.

Hi mstgermai267,
I have the same problem on myBosch microswave HMT 9656/GB, which stops after 22 seconds and does not heat. Did you ever get to the bottom of your problem, which seems to have cropped up with a number of Bosch microwave oven owners? There is a suggestion that there is some sort of internal fuse that may have blown.



Nov 26, 2010 | Bosch 500 HMB5050 Microwave Oven

1 Answer

Microwave works except not heating food

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

Microwave Oven Basic Troubleshooting Tips



May 08, 2010 | Bosch HMV9305 Microwave Oven

1 Answer

Boiling waer under micro wave lots of steam into micro wave, turn on micro wave ,pop noise like glass miro wave comes on louder hum than normal no heat

Q - The microwave display counts down and the inside light is on,  but nothing is heating and the fan is not running.
A - This most commonly is a bad door switch, other possible problems are a faulty relay or solder joint on the power module, but a bad door switch is most common.
 Q - My microwave is running and sounds like it is working but will not heat up anything.
A - Many thing can do this but, common things are....loose high voltage wire.....poor solder joint on board.....magnetron.....power relay.....
Q - The microwave makes a loud "hum or buzz" noise but will not heat up the food?
A - 9 times out of 10 this is usually this is a bad magnetron, the other time is sometimes a bad high voltage diode. See components section.

Mar 03, 2009 | Amana Radarange Microwave Oven

Not finding what you are looking for?
Microwave Ovens Logo

Related Topics:

116 people viewed this question

Ask a Question

Usually answered in minutes!

Top Bosch Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

9086 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Oscar Netto
Oscar Netto

Level 2 Expert

110 Answers

Are you a Bosch Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides