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Error code reference

Norcold Refrigerator Error Code Lo dc (with alarm, LP Gas mode)

Refrigerator attempted to ignite or re-ignite the burner when DC input voltage was less than 10.0 VDC

Norcold codesNorcold refrigerator codes

Refrigerator attempted to ignite or re-ignite the burner when DC input voltage was less than 10.0 VDC. Gas valve/igniter outputs inhibited. Displayed in Auto and Manual LP modes only.

First step from the service manual

Verify battery charging equipment is operational; verify AC/DC converter is operational; contact Customer Service.

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

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What Lo dc (with alarm, LP Gas mode) means on a Norcold refrigerator

The Lo dc error code on a Norcold refrigerator indicates that the DC supply voltage to the unit has dropped below 10.0 VDC at the moment the refrigerator attempted to ignite or re-ignite the LP gas burner. When this low-voltage condition is detected, the control board immediately inhibits both the gas valve output and the igniter output as a protective measure. This prevents incomplete ignition attempts that could result in unburned gas accumulation. The code only appears when the refrigerator is operating in Auto mode or Manual LP mode, since those are the only operating modes that require burner ignition.

The root cause is always insufficient DC voltage at the refrigerator's input terminals, not a failure of the gas system itself. Norcold sets the 10.0 VDC threshold because below that level, the igniter and gas valve controls may not receive adequate power to function safely and reliably. Common sources of this voltage drop include a depleted or failing house battery bank, a faulty or undersized AC-to-DC converter not maintaining proper charge, a failed battery charger, or excessive voltage drop through undersized or corroded wiring and connections between the power source and the refrigerator.

Diagnosing this code requires measuring DC voltage directly at the refrigerator's power input terminals while the system is attempting to operate, not just at the battery terminals. A significant difference between battery voltage and the voltage at the refrigerator indicates resistance in the wiring or connections. If the battery and converter both test within spec, inspect all wiring, fuses, and connectors in the DC supply circuit. If the voltage readings are inconclusive or the system continues to display the error, contact Norcold Customer Service for further guidance.

Source: manufacturer service documentation.

Common causes of Lo dc (with alarm, LP Gas mode)

  1. 01

    Depleted or failing house battery bank

    Part replacement

    If the battery bank is discharged below 10.0 VDC or individual cells have failed, the refrigerator cannot receive adequate power. Check battery voltage under load at the battery terminals using a multimeter.

  2. 02

    Faulty or non-operational AC-to-DC converter

    Part replacement

    When shore power is connected, the converter is responsible for maintaining battery voltage and supplying DC power. A failed converter will allow battery voltage to sag well below the 10.0 VDC threshold during ignition attempts.

  3. 03

    Failed or inadequate battery charging equipment

    Part replacement

    A battery charger that is not producing sufficient output voltage or amperage will fail to keep the battery bank above the minimum threshold, especially under the load of an ignition attempt.

  4. 04

    Voltage drop due to corroded or undersized wiring

    Wiring / connection

    Corroded terminals, loose connections, or undersized DC wiring between the power source and the refrigerator can cause significant voltage drop under load. Measure voltage at both the battery and the refrigerator input terminals and compare the readings.

  5. 05

    Blown fuse or tripped breaker in the DC supply circuit

    Wiring / connection

    A blown fuse or tripped breaker on the DC supply line can cause a partial power loss that results in low voltage at the refrigerator. Inspect all fuses and breakers in the DC circuit supplying the unit.

See the test procedure for each cause

Frequently asked questions about Lo dc (with alarm, LP Gas mode)

What does Lo dc (with alarm, LP Gas mode) mean on a Norcold refrigerator?
The Lo dc error means the refrigerator detected that the DC input voltage was below 10.0 VDC when it tried to ignite the LP gas burner. As a safety measure, the control board disables both the gas valve and the igniter until adequate voltage is restored. This error only appears in Auto or Manual LP operating modes. The problem is with the DC power supply, not the gas system.
How do I fix the Lo dc error on my Norcold refrigerator?
Start by verifying that your battery bank is fully charged and holding voltage above 10.0 VDC under load. Next, confirm that your AC-to-DC converter or battery charger is operational and producing the correct output voltage. Check all DC wiring, connectors, and fuses between the power source and the refrigerator for corrosion, looseness, or damage. If you cannot identify or resolve the issue, contact Norcold Customer Service for additional support.
Is the Lo dc error on a Norcold refrigerator a safety risk?
The Lo dc condition itself is a protective response, not a dangerous failure. The refrigerator intentionally inhibits the gas valve and igniter when voltage is too low to ensure the ignition sequence cannot proceed unsafely. The alarm is there to alert you that the refrigerator has stopped cooling and that DC power needs to be restored. Address the underlying power issue promptly to prevent food spoilage.
Will resetting my Norcold refrigerator clear the Lo dc error?
Simply resetting the refrigerator will not clear the Lo dc error if the DC input voltage is still below 10.0 VDC. The control board will detect the low-voltage condition again on the next ignition attempt and re-display the error. The error will only clear and stay clear once the DC power supply is restored to an adequate level and the refrigerator can complete a successful ignition sequence.
How much does it cost to repair a Norcold refrigerator showing a Lo dc error?
Repair costs vary widely depending on the root cause. If the issue is simply a discharged battery that recharges normally, there may be no parts cost involved. A replacement AC-to-DC converter or battery charger typically costs anywhere from $100 to $400 or more depending on the unit. Battery bank replacement can range from $150 to well over $500 depending on battery type and quantity. Wiring or connection repairs are generally on the lower end of the cost spectrum if no major components need replacement.

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    Norcold Lo dc (with alarm, LP Gas mode) Error Code: Refrigerator attempted to ignite or re-ignite the burner when DC input voltage... | MyPros+