Norcold Polar N7 / N8 / N10 series fault codes
The 3 fault codes below are the ones that apply to this Norcold refrigerator family. The other 10 Norcold refrigerator codes in our database belong to different model families — they are listed further down so you do not troubleshoot against the wrong table.
Covered model numbers
N7N7DCN7VN7XN8N8DCN8VN8XN10N10DCNA7NA8NA10
Not on the list? Check the rating label before you troubleshoot — the code table below will not apply. Where to find it →
Fault codes on the Norcold Polar N7 / N8 / N10 series
DC input voltage too low. The 12V supply feeding the refrigerator control has dropped belo… 9 flashes warning
DC input voltage too high. The 12V supply to the refrigerator control has risen above the … 10 flashes warning
Communication lost between the refrigerator's controls (the user-interface/display board a…
Codes that do not apply to this model
These 10 codes exist on other Norcold refrigerators. If your unit is showing one of them, it is not from this family — re-check the model number on the label before acting on any of these.
AC heater fault. The control cannot run the 120V AC heating element correctly, indicating … AC rE / Sr CL
The AC relay on the rear power board is stuck closed, so the control can no longer switch … dc LO / dc HI
DC voltage faults. 'dc LO' means the 12V DC voltage supplied to the refrigerator is too lo… dr
Door-open alarm. The refrigerator door has been left open longer than about two minutes, s… F1 / F2 / F3
Indicates an open (blown) fuse on the power board, each protecting a different circuit. F1… Li OP
The high-temperature limit (thermal) switch has opened, or the connection at the LIMIT IN … no AC
No usable 120V AC power is reaching the heater. The control reports that AC power is not a… no CO
The control board's cooling-system monitor detected that the refrigerator is not actually … no FL
The refrigerator tried to run on LP/propane (gas) mode but the control board did not detec… Sr FS / Sr
The flame-sense circuit inside the control has failed, so the refrigerator can no longer t…
Where the model number is
On the rating label inside the fresh-food compartment — usually the upper right side wall or the ceiling of the cabinet. On absorption fridges it is repeated on the burner-access panel behind the lower exterior vent.
Sources
- Norcold Polar N7V Service Manual, Flash Pattern 8 (DC input too low) — ManualsLib (Norcold service manual) (Polar N7V/N8V service manual, p.17 (8 flashes))
- Norcold Polar 7 Series Owner's Manual, Fault Codes (N7X/N8X) — ManualsLib (Norcold owner's manual) (Polar 7 Series manual, p.22 (Code 9 high DC))
- Norcold Polar N7V Service Manual, Flash Pattern 9 (DC input too high) — ManualsLib (Norcold service manual) (Polar N7V/N8V service manual, p.17 (9 flashes))
- Norcold Polar N7V Service Manual, Flash Pattern 10 (communications lost) — ManualsLib (Norcold service manual) (Polar N7V/N8V service manual, p.17 (10 flashes))
- Norcold Polar 7 Series Owner's Manual (snowflakes/comm-loss indication) — ManualsLib (Norcold owner's manual) (Polar 7 Series manual, p.22)
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