70 minutes into a 2 hr self clean cycle, F2 error (Oven Over Temp).
Oven does not appear to be over 990*F (spec limit for sensor error)
Lock circuitry operating properly (locks when cycle starts, unlocks when cool)
Band Sensor? Circuit reads 1048 ohms at room temp, 2450 ohms when the fault occurs (spec is 1100 and 2600).
These are at the ECR connector, so implies no issue with sensor wiring or connectors.
Component compartment (where all the electronics, cooling fan, lock and switches are) hits 215*F when the fault occurs.
I could not check if the Thermal Limit Switch was open or closed, but all behavior is that the switch has opened--alarm sounds until compartment temp drops to 190*F. Switch specs are to open at 225*F and close at 190*F...Does the component compartment get so hot during cleaning that is a 10*F shift in the switch is enough to cause a fault? Anyone know the design spec on temperature in the component compartment during self cleaning?