Glass door for a Siemens microwave hf 879

Not easy. All microwave repairs should be done by a professional. Oven doors are easy, but they make microwaves harder because they need to be sealed and checked for radiation leaks. Traditional ovens are easy, microwaves aren't.

https://www.google.com/search?q=replace+the+inner+door+glass+on+a+neff+C67M70+microwave

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I suggest calling service any work on a door needs a special detector after the repair to any door part. Only service techs carry these units.

You can remove the front glass and trim by removing the two torx screws at the top of the door, they are the ones next to the prongs that stickup from the door when open. Once these are removed the door front lifts up as the bottom is only hooked on. It looks like you need to remove more screws but you don't. A two person job as the door needs to be held in the nearly closed position as you lift off the front. Once you have the door off remove the two screws holding the handle on and it is then just the glue holding the trim on which in your case and mine has failed. I googled for oven door glue and found a very good site which has excellent instructions and video for application. The biggest hassle was cleaning off the old glue (scraper and acetone) and making sure it was aligned correctly before gluing, I used masking tape for a few dry runs as you only get one chance with the glue and it goes off quickly. Hope this helps.

I uploaded a Dutch manual here: https://www.gebruikershandleiding.com/Siemens-HF-24052/preview-handleiding-1014131.html

It sounds like the magnetron may have either failed or is not being supplied with the extremely high voltage required to run it.

This is a job for a proffessional but if you are safety clued up, here's instruction.
Make sure the !!!!capacitor is 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.

This is a problem that at least a few others have experienced with your microwave and may be the subject of a recall although I could find nothing on their website.
I would definitely go to Siemens first as this definitely sounds like a manufacturers defect. Even if they have not publicly stated this in a recall, they likely know it is happening and may fix it (even out of warranty) if you push. ConsumerReports.org may be interested... I would talk to them if you don't get any satisfaction from Siemens.
Otherwise, the glass should be standard tempered glass that a local glass shop can get if you bring the door to them, or just a sample of the broken glass (for thickness) along with the internal dimensions of the glass.
Make sure that the metal mesh/screen remains in place and is not damaged, as this is what prevents the microwaves from escaping the cooking chamber.
Siemens Customer Support Website
Siemens Service # 1-866-447-4363

I just had exactly the same problem with the same oven, did you find a solution yet?

dont need new door glass is replaceable very cheap but tricky to replace

To access the door handle mounting screws, you have to remove the inner door panel that goes around the perimeter of the glass. You can use a small screwdriver to simply pry the plastic up and work your way gradually around the perimiter of the glass. Most microwave ovens have grooves in the panel that you can insert the screwdriver into. Use care not to pry against the glass. The glass is tempered and also has an RF shield that prevents harmful microwaves from potentially harming the consumer. If you break the glass, you will need to purchase a new door.

The door handle screws are located behind the inner panel. Simply remove the broken handle and install the new one. Re-insert the inner door panel carefully and gradually work your way around the perimeter of the door glass and make sure it snaps back into place.

If you have questions, please let me know. I hope you find this information helpful.

Please, Can somebody tell me where can I get one of this oven??? Thanks Andy