BACKGROUND: I have a GE glass-top radiative stove (model jp3030tj2ww) that has 1 burner that starts on high on the lowest setting and gets stuck there and a 2nd burner that only does this sometimes when I have the heat set to level 3 (~1/2 way) or higher. These are both the large pan 2500W burners. The other two (smaller) burners work as intended.
WHAT I'VE DONE: I've taken apart the stove and inspected each of the 4 infinite switches (msa-w735-gem) with a working ohmmeter. I've tested each pairwise combination of wire tabs for continuity and for resistance (ohms) in OFF, high, and low settings according to instructions such as here.
All 4 infinite switches performed the exact same. None had continuity in the off setting, and each registered a resistance of < 1 ohm when turned on regardless of temperature setting.
[I will note that the L1 to P reading for each fluctuated constantly/greatly from ~20-180 ohms -- however, I have no issues with the light and am not sure how to interpret this].
STATUS AFTER TESTING: All 4 infinite switches "passed" the ohmmeter test and all behaved identically. But what gives??, since 1 supposedly doesn't work at all and another only works some of the time.
None of the contacts are stuck on any unit, and the non-working units have components that I would argue look to be in even better shape then the working units -- though, there's hardly any difference. The non-working switch lacks burn marks that I have see demonstrated on a lot of how-to videos.
What else can I look for on these switches to indicate that the switch is to blame?*
I just can't image there is, but can any other stove component lead to these symptoms? (i..s, am I missing something??)
*Part of this is educational. I'm trying to learn more about these components, and I am really stumped as to what else could fail on the switch and how I can learn to identify it without having go the trial and error root.