Sears Kenmore Smooth Top Electric Range - C880. Zapping (arcing?) sound at knob

[diyguy1000]

I recently noticed the left rear element control knob is making a popping/zapping/arcing sound when set to most positions.  The sound seems to come from behind the knob.  The sound occurs whenever the element switches on/off to regulate its temperature.  The is no sound during the ON phase, or OFF phase, just the during the transition.

Other than the sound at the knob, the element is still working normally, but I have stopped using it.

Any suggestions?

Model C880

[AJ]

Hi diyguy1000,

The switch for that burner is located behind the knob. I would replace that switch.

Are you sure that is the correct/full model number?

Model Number Locator

I tried to Look Up The Model Number, but did not find it.

[diyguy1000]

Full model number is C880 665020L0

Type 30p

[diyguy1000]

I talked to Sears.  It was difficult getting the person to understand the problem, but in the end they suggested the "Infinite Switch" 1400W, part # 9750643.

[JWWebster]

I have some videos which feature how those switches work
I kinda grouped em all together still workin on page

Videos

[AJ]

I talked to Sears.  It was difficult getting the person to understand the problem, but in the end they suggested the "Infinite Switch" 1400W, part # 9750643.

Thanks for posting the part number.
Let us know how the repair goes.

[diyguy1000]

Great, thanks!  The explanation of the switch operation in the video reassures me that this is the right part.

I wonder if the switch itself can be fixed.  The arcing noise may be due to bad contact from an accumulation of carbon deposits or oxidation.  I'm not sure if the switch can be opened (without destroying it).  If accessable, I might be able to give the contacts a light sanding.

[JWWebster]

If it was me I would get a new switch