Norcold 1200 / 1210 / 1211 fault codes
The 6 fault codes below are the ones that apply to this Norcold refrigerator family. The other 7 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
120012101211
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 1200 / 1210 / 1211
AC HE warning
AC heater fault. The control cannot run the 120V AC heating element correctly, indicating … AC rE / Sr CL warning
The AC relay on the rear power board is stuck closed, so the control can no longer switch … dr info
Door-open alarm. The refrigerator door has been left open longer than about two minutes, s… Li OP danger
The high-temperature limit (thermal) switch has opened, or the connection at the LIMIT IN … no FL warning
The refrigerator tried to run on LP/propane (gas) mode but the control board did not detec… Sr FS / Sr warning
The flame-sense circuit inside the control has failed, so the refrigerator can no longer t…
AC heater fault. The control cannot run the 120V AC heating element correctly, indicating … AC rE / Sr CL warning
The AC relay on the rear power board is stuck closed, so the control can no longer switch … dr info
Door-open alarm. The refrigerator door has been left open longer than about two minutes, s… Li OP danger
The high-temperature limit (thermal) switch has opened, or the connection at the LIMIT IN … no FL warning
The refrigerator tried to run on LP/propane (gas) mode but the control board did not detec… Sr FS / Sr warning
The flame-sense circuit inside the control has failed, so the refrigerator can no longer t…
Codes that do not apply to this model
These 7 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.
8 flashes
DC input voltage too low. The 12V supply feeding the refrigerator control has dropped belo… 9 flashes
DC input voltage too high. The 12V supply to the refrigerator control has risen above the … 10 flashes
Communication lost between the refrigerator's controls (the user-interface/display board a… dc LO / dc HI
DC voltage faults. 'dc LO' means the 12V DC voltage supplied to the refrigerator is too lo… F1 / F2 / F3
Indicates an open (blown) fuse on the power board, each protecting a different circuit. F1… 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 …
DC input voltage too low. The 12V supply feeding the refrigerator control has dropped belo… 9 flashes
DC input voltage too high. The 12V supply to the refrigerator control has risen above the … 10 flashes
Communication lost between the refrigerator's controls (the user-interface/display board a… dc LO / dc HI
DC voltage faults. 'dc LO' means the 12V DC voltage supplied to the refrigerator is too lo… F1 / F2 / F3
Indicates an open (blown) fuse on the power board, each protecting a different circuit. F1… 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 …
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 Fault Codes AC HE, H, or On light flashing 3 times (What to do!) — RV Fridge Guys (AC HE AC heater fault, 64 ohm spec for 1200/1210)
- Norcold 121x Series Service Manual — Norcold / MyRVWorks (AC heater fault diagnostics)
- Norcold 1200XX / 120X-IMXX Refrigerator Service Manual, "Sr CL - AC rE Fault Code - AC relay stuck closed" (p. 11) — Thetford Corp. / Norcold, Inc. (OEM), Publication No. 618968B (618968B p.11: "Sr" and "CL" flashing with AC LED flashing, or "AC" and "rE" flashing = AC relay stuck closed. Replace power board.)
- Norcold N6XX/N8XX Models Refrigerator Service Manual, Fault Codes table — Norcold, Inc. (OEM), Publication 619394E (N640/N641/N840/N841: "Sr" = flame sense circuit has failed; N620/N621/N820/N821: "S" = flame sense circuit has failed)
- Norcold 1210 Owner's Manual (629510B), Fault Code table — Norcold / PDX RV Wholesale (dr = door open more than 2 minutes)
- Fault Codes - Norcold 1210 Installation Manual (p.22) — Norcold / ManualsLib (Door open alarm fault code)
- Norcold Fault Codes LI OP, O, or 6 flashes (potential fire hazard!) — RV Fridge Guys (Norcold technical blog, Li OP / high-temp limit)
- Norcold 1200 (1200,1201,1210,1211) LiOP Error — Flashbye / Norcold service reference (LiOP high temp limit switch open)
- Norcold Service Manual for N620/N621/N640/N641/N820/N821/N840/N841 (and -IM ice-maker variants) — Norcold, Inc. (OEM), hosted by MyRVWorks (Part No. 619394 (5-98), Fault Codes section: '"no" "FL" — The burner did not ignite or reignite — Refer to LP Gas Ignition Failure'; operation section: fault remains until ON/OFF is pushed twice)
- Norcold 2118IM Service Manual — No AC, No FL fault description — Norcold, Inc. (OEM), via ManualsLib (Page 18: NO FL = power board detects AC input below 85VAC, switches to LP Gas Mode, and cannot detect a flame in Auto Gas Mode)
- Norcold Fault Codes F, no FL, or gas light flashing every second (LP/Flame Problems) — RV Fridge Guys (RV refrigerator repair specialists) (Lists affected models (N641/N642/NX641/NXA641/N841/N842/NX841/NXA841/1200/1210/1211/2117/2118) and burner/electrode/flame-sense diagnostics)
- Norcold 1200XX / 120X-IMXX Refrigerator Service Manual, "Sr FS - Sr Fault Code - Flame sense circuit failure" (p. 10) — Thetford Corp. / Norcold, Inc. (OEM), Publication No. 618968B (618968B p.10: "Sr" and "FS" flashing with AC LED flashing, or "Sr" flashing = flame sense circuit failure. Replace power board.)
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