Question about KitchenAid Microwave Ovens
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Posted on Jan 02, 2017
I have a 13yr old above-range oven which quit when my wife cooked food in an aluminized foil wrapper (a small fire ensued!). This oven has 3 thermal protection units, on the magnetron, the chassis and on top of the food cavity. This last one had failed open, and since it's in series with the magnetron thermal protection unit and the main relay, nothing would work. MAT electronics sell the units for less than $4, but my problem now is to pick one with the appropriate temperature cut-off. They range from 200 to 300F.
Posted on Nov 18, 2006
SOURCE: Fuses keep blowing out
In case it's still helpful, I'll inject a little sanity into the replies.
If the fuse blows as soon as you hit Start, it's probably a shorted high-voltage capacitor. That's usually economical to repair.
If the fuse blows a few seconds after you hit Start, it's probably a shorting high-voltage transformer. That's usually not economical to repair.
It's not radiation (non-ionizing RF by the way) that's the hazard, it's the voltages.
Posted on Nov 05, 2007
hi i am suggesting that it is probably the magy as the res to grndis a bit low and therefore loading the sec supply down , just a thought
Posted on Oct 23, 2008
Chances are if the varistor fails, it fails drastically causing a short circuit across the supply. It will sit across the supply (it will look like a thick ceramic capacitor) and you can check for continuity after isolating that at one end. If it shows low resistance (it should show almost open circuit with a Digital meter), replace it.
It need not be the culprit. If you are familiar working with High voltage circuits ( they are lethal inside a microwave ovens as the current capability is high here), you can discharge the doubler capacitor and isolate the high voltage diode to check for shorts in the HT area.
Posted on Mar 18, 2009
We have here a video on how to remove door for replacing door hinges if it have any small diferences in model we belive is better than any written istructions. We have also the link for parts diagram of your actual model for additional guidance and also for a reference if you need to rder directly any parts.
Posted on Aug 11, 2011
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