Damper Operation; Mullion Heater; Fresh Food Thermistor; Freezer Thermistor - Viking RDDFF236 Service Manual

Diagnostics
Service Tests (continued)

121 Damper operation

Press the refrigerator temperature "+" (up) or "–" (down) keypad to toggle Damper OP (open) or CL (Closed).
1 2 1
Press either button to toggle
through test cycles
note: When damper is opening or closing it will display–if damper state is unknown. It can also show DP if
damper is moving when initially entering service mode.

131 Mullion heater

Press the refrigerator temperature "+" (up) or "–" (down) keypad to toggle Mullion Heater Off and On.
1 3 1
Press either button to toggle
through test cycles

141 Fresh Food Thermistor

This test will check the temperature form the fresh food thermistor. You will see the actual temperature, OP for
open thermistor, or SH for shorted thermistor.
1 4 1
Press either button to toggle
through test cycles

142 Freezer Thermistor

This test will check the temperature from the freezer thermistor. You will see the actual temperature, OP for
open thermistor, or SH for shorted thermistor.
1 4 2
Press either button to toggle
through test cycles
© 2012 Viking Preferred Service
O F F
Press either button to cycle
Damper OPEN or CLOSED
O F F
Press either button to cycle
Mullion Heater ON or OFF
4 1
Actual temperature in food
compartment, OP or SH
2 8
Actual temperature in freezer
compartment, OP or SH
18