Question about Microwave Ovens
My JennAir just quit working last night. The control panel still works. The time is displayed and you can select a cook time but the microwave never comes on when you hit the start button. The timer begins counting down the time and the light comes on, but nothing happens. Any advice would be much appreciated. I saw someone else had this probloem but I didn't see any answer. I would greatly appreciate any suggestions you could give me. My husband put in a new timer when it went out but neither of us know what this could be. Thank you for any help you might could give us.
If this microwave is more than a couple of years old, it's possible that the magnetron tube or a rectifier has burned out. You'll probably need to take it to an experience microwave service technician to get a diagnosis.
Posted on Jan 17, 2008
Do the inside light and cooling fan come on when you press Start?
If so, the problem is likely to be in the high voltage section.
If not, then the problem is likely to be related to the door switches or possibly the controller.
Generally, the most common causes of a failure to heat are:
- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose connection on the control unit circuit board
- bad magnetron or other high voltage part (such as a shorted diode)
If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk
You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383
Your model may also have a "mini-manual" hidden inside the unit behind the control panel, which is very helpful when troubleshooting.
We're happy to help and we appreciate your thoughtful rating of our answer.
Posted on Mar 30, 2008
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If there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron.
So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off.
Make sure that the program controller is working if not check power - step down supply, the pads are responding- if not faulty pads- or the door switches, if contact is not through the microwave will not work.
Now keeping clear of the microwave, switch on, use a cup of water inside to test.
If you notice any sparks shut off as the magnetron or the main HT capacitor can be faulty. replace with same type.
If there is heating without any issues, you can use the microwave safely
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