Thermador PDR30, PRG48, PRG30, PRG36, PDR36, PDR48 Error, Cause, Corrective Action, F114, F121, F123

B

Error	Cause		Corrective Action
F114	Runaway lower temperature	1.	Check P24 connector on the Power Board.
	(>950°F)	2.	Unplug the sensor connector and check lower sensor resistance
	a) Intermittent or bad		(approximately 1080 ohms at room temperature with connector
	temperature sensor.		removed).
	b) Heating element relay stuck	3.	If sensor is OK, replace Power Board.
	on.	4.	Check wiring to heating element. If OK, replace Power Board.
F121	Stuck keyboard key.	1.	Check all connections between the display head (P5) and the
	Bad display head or bad		keyboard (J1).
		2.	Make sure that there are no objects in close proximity to the front
	keyboard.		and back sides of the keypads.
		3.	Replace Display Board or keyboard or both.
F123	Keyboard disconnected	1.	Check all connections between keyboard (J1) and Display Board
	Bad connection between		(P5).
		2.	If OK, replace keyboard or Display Board or both.
	keyboard and Display Board.

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