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Error code reference
Viking Refrigerator Error Code dEF
Forced defrost cycle is active: displayed on the seven-segment display in place of temperature numerals during a defrost cycle.
SourceViking Built-In Bottom-Mount Refrigerator - Service Manual (FDBB5361/VCBB5361)p. 8
Diagnostic procedure
The full dEF procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
No action needed; display returns to normal temperature numerals when defrost cycle completes.
SourceViking Built-In Bottom-Mount Refrigerator - Service Manual (FDBB5361/VCBB5361)p. 8
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
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