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Thermador®
S, SM, AND SMW Oven Error Code Messages…continued
Error Code
Displayed
Probable Cause
Example
Corrective Action
F- Communication error
detected by main
power/relay board.
Control head Check all connections between both power/relay
boards. Check all power connections between the
power/relay board and the control head. Check all
communication connections between the power/relay
board and the control head. See note 1.
Fr
(1) Invalid door latch switch
status for lower oven
Defective or jammed
lower oven latch
switches
Make sure the lower latch switches are operating
properly. Replace the lower latch if necessary.
(2) Communication Error at
display head.
Check Control Head
Check all connections between both power/relay
boards. Check all power connections between the
power/relay board and the control head. Check all
communication connections between the power/relay
board and the control head. See note 1.
(3) Element Supervisor
Disable Lower Oven
Intermittent lower
sensor or 2
nd
power/relay board
Replace lower oven temperature sensor. If Control still
display Fr, replace 2
nd
power/relay board. If Fr is still
displayed, replace the main power/relay board.
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