Thermador PDR30, PRG48, PRG30, PRG36, PDR36, PDR48 manual F114, F121, F123

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.