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Error code reference

Norcold Refrigerator Error Code Sr

Flame sensing circuit malfunction

Norcold codesNorcold refrigerator codes

Flame sensing circuit malfunction — problem in flame sense circuitry, gas valve drive circuit fault, or internal memory fault.

First step from the service manual

Ensure white wire from P1-10 to gas valve is not pinched or shorted to ground; replace power board.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What Sr means on a Norcold refrigerator

The Sr error code on a Norcold refrigerator indicates a malfunction within the flame sensing circuit. This circuit is responsible for detecting whether the propane burner has successfully ignited and is sustaining a flame during gas operation. When the control system cannot confirm a valid flame signal, or when it detects a fault in the gas valve drive circuit or internal memory, it triggers the Sr code and shuts down gas operation as a safety measure.

The fault can originate in several areas. The gas valve drive circuit, which includes the wiring between the power board and the gas valve, is a common culprit. Specifically, the white wire running from pin P1-10 on the power board to the gas valve must be inspected first. If this wire is pinched, frayed, or shorted to ground anywhere along its path, the board cannot properly drive the gas valve and the flame sensing circuit will report a fault. A shorted wire can also damage the power board itself, so both should be evaluated together.

An internal memory fault is another possible cause, meaning the power board's onboard logic or firmware has encountered a condition it cannot resolve through normal operation. In these cases, the wiring harness may check out as intact, but the board itself has failed internally. Because the Sr code can point to the wiring, the gas valve drive circuit, or the board, diagnosis should follow the wiring inspection first before condemning the power board. Replacing the power board is the recommended corrective action once wiring issues have been ruled out.

Source: manufacturer service documentation.

Common causes of Sr

  1. 01

    Pinched or shorted white wire at P1-10

    Wiring / connection

    The white wire running from pin P1-10 on the power board to the gas valve may be pinched against a cabinet edge or shorted to ground. Visually trace the entire wire path and check for continuity and ground isolation before proceeding.

  2. 02

    Failed power board

    Part replacement

    If the wiring checks out as intact, the power board itself may have an internal fault in the gas valve drive circuit or memory. A failed board cannot be repaired in the field and must be replaced.

  3. 03

    Gas valve drive circuit fault

    Part replacement

    The circuit that sends the drive signal from the power board to the gas valve may have failed, preventing the valve from operating and leaving the flame sensor unable to confirm ignition. This fault typically implicates the power board as the source.

  4. 04

    Damaged wiring connector at gas valve

    Wiring / connection

    The connector where the white wire terminates at the gas valve can corrode or back out, causing an intermittent or open circuit. Inspect the connector for corrosion, bent pins, or a loose fit.

  5. 05

    Internal memory fault on power board

    Part replacement

    The power board contains onboard logic that can develop an internal memory fault, causing it to report an Sr code even when external wiring is undamaged. This condition requires power board replacement.

See the test procedure for each cause

Frequently asked questions about Sr

What does Sr mean on a Norcold refrigerator?
The Sr code indicates a flame sensing circuit malfunction. It can point to a problem in the flame sense circuitry itself, a fault in the gas valve drive circuit, or an internal memory fault on the power board. The refrigerator will stop gas operation when this code is active. A wiring inspection followed by power board replacement is the standard diagnostic path.
Can I fix the Sr error myself?
A knowledgeable DIYer can inspect the white wire from pin P1-10 on the power board to the gas valve for pinching, fraying, or shorts to ground. If the wiring looks intact, the power board will need to be replaced, which is a more involved repair. Working around gas components and control boards carries real risk, so a certified technician is recommended if you are not comfortable with appliance electrical systems.
Is the Sr error on a Norcold refrigerator a safety concern?
Yes, the Sr code is safety-related. The refrigerator has detected that it cannot reliably sense or control the propane flame, so it shuts down gas operation to prevent an unsafe condition. Do not attempt to bypass the error or force gas operation. Address the underlying wiring or board fault before returning the unit to service.
Will resetting the refrigerator clear the Sr error code?
A reset may temporarily clear the Sr code, but if the underlying fault in the wiring, gas valve drive circuit, or power board is still present, the code will return. Clearing the code without repairing the cause does not make the unit safe or functional on gas. The root cause must be diagnosed and corrected for the error to stay cleared.
How much does it cost to repair an Sr error on a Norcold refrigerator?
Repair costs depend on what is faulty. If only the wiring needs correction, costs may be limited to labor, typically in the range of $75 to $150. If the power board requires replacement, parts alone can range from $150 to $400 or more depending on the model, with additional labor on top of that. Getting a diagnostic estimate from a technician before authorizing parts is advisable.

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