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Re: Kenmore 62622 microwave
A component of the high voltage section has shorted, possibly the diode. If it was the capacitor, it would normally blow th fuse.
If it is the high voltage transformer and you continue running it,
it should devolpe smoke in about one minute. Either way, a part
will have to be replaced to correct the situation.
a 6ya Repairman can help you resolve that issue over the phone in a minute or two.
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You know how when you turn on a regular light bulb and it burns out with a bright flash? What happens is that when the filament burns out, it breaks and bounces back and hits the other electrical post and basically shorts out causing that bright flash. Sometimes, when the light bulb in the microwave burned out, it shorted out, and caused the circuit-board trace to burn up. (This is not just conjecture; I've seen it.) If that's the case, then you would have to replace the main control circuit board. Unfortunately, a rather expensive repair for no lights. (Although the circuit board trace can usually be repaired by direct-soldering a wire to replace the burned trace. Sears repairmen won't do this, but an independent electronic technician could do it.
When the oven does not heat, the problem is usually due to the magnetron failing. It the part that generates the microwaves that heat the food. It fails by shorting out causing a loud buzzing noise. The burning smell is the being magnetron overloaded due to the short. It not worth fixing since the replacement cost of a magnetron is close to the price of a new oven. Sorry.
Is this oven still under warranty? If so, take advantage. If not, remove the power plug and the case. Short out, with a screwdriver, the large can-shaped capacitor with two terminals sticking out. Check the wiring and circuit board for signs of burning. If everything looks ok, remove the thin sheet metal wave guide that sits above or beside the microwave energy port into the cooking cavity. Under the sheet metal, there is a metal fan-like device called a 'stirrer' that has a plastic bearing. Remove this stirrer and smell the bearing. If it smells like the burning wire smell, replace the stirrer. You can buy it through 'Sears Parts' online.
It sounds like the transformer is shorting out on you but is not completely shorted.It will be shorting out on the output side of the transformer.this will give you a lower output level,and will cause the microwaves to be weaker.(less turns of wire in the secondary of the transformer).The short will probably get worse.Simply replacing the transformer should cure the microwave.
If you clean any appliances always plug out the unit power supply do spray any liquid in the unit that can enter inside the control, instead just wipe it with rug not spray. In this situation you have to call for a qualified technician. Maybe there are some wires that burned or rust in the control that cause the short circuit inside the unit..
If this has a controller that runs a microwave and an oven, then the problem F2 means a temperature related fault such as a bad temp sensor / thermostat or a defect in the control board.
If it's just a microwave, then the problem is likely a failing keypad. In many cases, those can be replaced economically.
If you repost with your exact model number (62622 is not a complete model number) then we can advise you further and more specifically.