Stove is a Whirlpool WFG510S0AW2. New to us, bought used, from a rental.
The behavior we're seeing is, when set to 'bake', the oven will light, the temperature display will show a rising temperature until the setpoint is reached (say, 350F), and then the gas will shut off. Fine, so far. However, the oven will not re-ignite until the temperature drops to ~240F or less. (To see this, you have to cancel the 'bake', and then restart it.) So, really lousy temperature regulation.
However, in 'diagnostic mode', this stove will show the oven sensor temperature. When observed, two things:
- When the oven reaches the setpoint temperature on the 'regular' display (350F) and the gas shuts off, the diagnostic temperature reads ~450F.
- When the oven re-ignites (as above, the 'regular' display reads < 240F), the diagnostic temperature reads 350F. After re-ignition, the above pattern repeats.
There is only one oven temperature sensor. Yet, it seems to have two disparate temperatures. Further, setpoint shut-off (350F) seems controlled by one temperature reading, and re-ignition by the other.
The functional issue is, it won't hold temperature. But, the rest is so strange that I think I must be missing something.
UPDATE: On further thought, I think it may be working correctly. Because the temp sensor is located quite near the burner, while the goal is to set the air temperature, it might make sense to 'overcharge' the temperature at the sensor by an empirically-determined amount, so that the air will have reached the desired setpoint. After the gas turns off, the sensor would be responding to the actual air temperature rather than heat from the burner, and so it would then make sense to restart the burner when the sensed temperature fell back to the setpoint.
If so, the 'regular' display is a computed value, adjusted when the burner is on to compensate for its being so near the burner.