Oven quit heating after cleaning - KitchenAid KEMC377K Convection / Microwave Oven

I am a bit late on this question, but just ended up in a rabbit hole of unanswered Kitchenaid questions

The self cleaning features only serves to keep manufacturers in steady sales of parts. Quite simply the oven can only take those temperatures a few times until they break. The heat burns out elements, damages fans, door locks and worst of all damages control boards which are not far enough from the heat source. You problem sounds like the walls of the oven have buckled in the heat so the racks no longer fit. Too late now, but you should have taken Kitchenaid to court, the oven was not fit for purpose under the description they used to sell it to you.

Never use the self cleaning feature as stated here

https://www.google.com/search?q=self-cleaning+oven+temperature

Never Ever use the self clean feature. We see damage here every couple of weeks. The worst was a burned control board on an oven that all parts were obsolete, so the self clean cost a thousand bucks!

Self-cleaning ovens bring the heat so you don't have to spend hours scrubbing. Traditional self-cleaning cycles heat the oven between 800°F and 900°F, helping turn soil and spills to a powdery ash you can then wipe away. They utilize only heat-no chemicals-and are built to withstand high temperatures. (Says Maytag who love selling elements, door locks and other parts),

Why You should Never Run A Self Clean Oven Cycle & ...

General Appliance Servicehttps://www.generalappliancesvc.com > why-you-shou...

Jan 29, 2020 - A self-cleaning oven is a feature on many modern ovens that burns off cooking spills and splatters with an extremely high temperature (932 F° or ...

Self-cleaning oven

Wikipediahttps://en.wikipedia.org > wiki > Self-cleaning_oven
A self-cleaning or pyrolytic oven is an oven which uses high temperature (approximately 932 °F (500 °C)) to burn off leftovers from baking, without the use ...

‎Pyrolytic process · ‎Alternative technologies · ‎Catalytic cleaning

Self-Cleaning Oven: 6 Reasons to Stop Using Feature ...

FIX Appliances CAhttps://fixappliances.ca > 4-reasons-stop-using-self-cle...

A self-cleaning oven is a feature on many modern ovens that burns off cooking spills and splatters at an extremely high temperature (932 F° or 500 C°) to aid in ...

‎How Self-Cleaning Ovens Work · ‎Major Parts Damage

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HI..there is a heating filament of an oven..it s responsible of producing heat to the oven..this filament must be replaced by a new one..theres no problem with the motor cos it runs the table power and light button seems working..

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.

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

The flashing can be sparking of the magnetron please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is leaking and sparking to the ground. If this was stored, it is 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.
Now keeping clear 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

If there is nno heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is not working If this was stored, it is 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.
Now keeping clear switch on , use a cup of water inside to test.
The magnetron or the main HT capacitor or the temperature cut off unit mounted on the side of the cabin can be faulty. replace with same type.
If there is heating without any issues , you can use the microwave safely

If there is spark please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is leaking and sparking to the ground. It is 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.
Now keeping clear switch on , use a cup of water inside to test.
If you notice any buring smell shut off as the magnetron or the main HT capacitor can be faulty. replace with same type.
If there is no heating the magnetron/capacitor/temperature cut off is faulty

Could be the magnatron/thermal cut out seek pro advice

I have had the LG model lrm1260sw microwave for 3 years. Recently it quit heating. I found the problem was the soldered grounding lug connection on the power transformer had lost circuit continuity and failed. One of the secondary coils on the power transformer, red wire / bare copper wire, is connected to ground / chassis. I cleaned the lug connection and added a length of wire twisted together with the bare copper coil wire and soldered to the grounding lug. I then grounded the extra added length of wire to another chassis ground point. Make sure the transformer to chassis mounting screws are tight also. Now the microwave oven works like new again.

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

Microwave Oven Basic Troubleshooting Tips

heatman101
hjjk

If all controls on the panel work fine but the microwave does not heat, then either you have a defective door switch,the smartboard is defective, or you have a defective magnatron.Most likely one of those three.