Thermador SMW272YB Training Program page 94

S, SM, and SMW Oven error code messages
Error code Possible cause
displayed
F8 Shorted meat probe (NOTE:
no meat probe is used on
these models)
F9 Invalid
(single or upper oven)
FC Communication error detected
by display head
FF Bad analog/digital converter
Fr (1) Invalid
switch status for lower oven
(2) Communications error
at display head
(3) Element
disabled lower oven
door switch status
door latch
supervisor
Example
Bad relay board
Bad or stuck latch
switches
Lower oven relay board
not powered up
Intermittent sensor or
main relay board
Check lower door latch
switches
Check display head
Intermittent lower oven
sensor or lower oven
relay board
Corrective Action
Replace main relay board.
Check latch for proper operation.
Replace if necessary.
Check cables and
between main and lower relay
boards. If they're OK, replace lower
oven relay board.
Check sensor and replace
necessary. If new sensor displays
FF, replace main relay board.
Replace latch if necessary.
Replace display head (see note 1).
Check sensor and replace
necessary. If new sensor displays
Fr, replace lower oven relay board.
harnesses
if
if
9 4
9 4