Norcold Refrigerator: “Sr / CL flashing”
warning RV refrigerator error codes
What it means
The control detected that the AC relay is stuck in the closed position, so it cannot properly switch the AC heating circuit. This is an internal power board fault.
Most likely causes
- Welded or stuck AC relay on the rear power board most likely
- Damaged power board control circuitry common
Safe checks you can do yourself
- Note the code and cycle the fridge OFF then ON to confirm it returns
- Confirm AC supply voltage is stable (not surging) before assuming the board is bad
How to reset / clear Sr / CL flashing
- Cycle the refrigerator OFF and ON once to see if the fault is momentary
- A persisting Sr/CL fault is a board-level issue and is not cleared by a normal reset
When to call a technician
Sr/CL returns after a power cycle, which per the service manual indicates the rear power board must be replaced.
Accuracy notes
Manual instructs replacing the power board; this is dealer/qualified-service work, not an owner fix.
Applies to
1200 · 1201 · 1210 · 1211
FAQ
What does Norcold Refrigerator code "Sr / CL flashing" mean?
The control detected that the AC relay is stuck in the closed position, so it cannot properly switch the AC heating circuit. This is an internal power board fault.
How do I reset Norcold Refrigerator Sr / CL flashing?
Cycle the refrigerator OFF and ON once to see if the fault is momentary. A persisting Sr/CL fault is a board-level issue and is not cleared by a normal reset.
What is the most common cause of Sr / CL flashing on a Norcold Refrigerator?
The most likely cause is welded or stuck ac relay on the rear power board.
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Sources
- Norcold 1200 Series Service Manual, Sr / CL / AC / rE fault codes (p.16) — Sr & CL flashing = AC relay stuck closed, replace power board (Norcold / ManualsLib)
● Checked against 1 manufacturer document · Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual. How we verify