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Error code reference

Norcold Refrigerator Error Code no AC, no FL

Combination fault

Norcold codesNorcold refrigerator codes

Combination fault: power board sensed AC input voltage less than 85 VAC and automatically switched to LP Gas mode, then was unable to detect a flame in Auto Gas mode.

First step from the service manual

Follow the verify instructions for the no AC fault and no FL fault.

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

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What no AC, no FL means on a Norcold refrigerator

The combined no AC, no FL fault on a Norcold refrigerator indicates a sequential two-stage failure. First, the power board detected that incoming AC voltage dropped below 85 VAC, which is below the minimum threshold required for safe and effective electric operation. Rather than shutting down entirely, the refrigerator's Auto mode logic automatically switched operation over to LP gas as a fallback. This is normal behavior in Auto mode, designed to maintain cooling when shore power is insufficient or interrupted.

The second part of the fault occurs after that automatic switchover. Once in LP gas mode, the control board attempted to ignite the burner and establish a flame, but the flame sensor failed to confirm successful ignition within the required detection window. This no FL condition means the board did not receive a valid flame signal, which could stem from a gas supply issue, an igniter problem, or a fault in the flame sensing circuit itself. The board logs both faults together because they occurred as a linked sequence during the same operational cycle.

Diagnosing this combination fault requires addressing each component separately. Start with the no AC condition: check shore power voltage at the outlet, inspect the power cord, and verify the converter or inverter output is delivering adequate voltage above 85 VAC. Then investigate the no FL condition by confirming LP gas supply pressure, checking for burner orifice blockage, testing igniter spark output, and inspecting the thermocouple or flame sensor for proper position and continuity. Both faults must be resolved to restore normal Auto mode operation.

Source: manufacturer service documentation.

Common causes of no AC, no FL

  1. 01

    Low or unstable shore power voltage

    Wiring / connection

    If the AC voltage at the outlet is below 85 VAC, the power board will abandon electric mode. This can result from a faulty campground pedestal, a long or undersized extension cord, or a failing converter or inverter. Measure voltage directly at the refrigerator's power input to confirm.

  2. 02

    Empty or closed LP gas supply

    Wiring / connection

    If the propane tank is empty, the valve is closed, or a regulator is failing, the burner will not receive enough gas to ignite. Verify tank level, confirm all valves are open, and check that other LP appliances in the unit are functioning normally.

  3. 03

    Burner orifice blockage or igniter failure

    Part replacement

    Insects, debris, or corrosion can block the burner orifice, preventing adequate gas flow for ignition. Similarly, a worn or fouled igniter may not produce sufficient spark. Inspect the burner assembly and igniter electrode visually and clean or replace as needed.

  4. 04

    Faulty flame sensor or thermocouple

    Part replacement

    Even if the burner lights, a damaged or mispositioned flame sensor may fail to detect the flame and signal the board to shut off gas. Check the sensor's position relative to the burner flame and test for proper electrical response.

  5. 05

    Defective power control board

    Part replacement

    If AC voltage is confirmed adequate and LP gas components test correctly but both faults persist, the power board itself may be misreading input voltage or failing to properly control the ignition sequence. Board replacement is typically a last step after all other causes are ruled out.

See the test procedure for each cause

Frequently asked questions about no AC, no FL

What does no AC, no FL mean on a Norcold refrigerator?
This combination fault means the power board detected AC input voltage below 85 VAC and automatically switched the refrigerator to LP gas mode. After switching, the board attempted to ignite the LP burner but could not confirm a flame was established. Both failures are logged together because they occurred as a linked sequence. You need to resolve the low voltage issue and the ignition failure separately to restore normal operation.
How do I fix the no AC, no FL error on my Norcold refrigerator?
Begin by checking the AC power source: measure the voltage at the outlet or power input and confirm it is above 85 VAC. Correct any wiring issues, replace extension cords, or contact the campground if the pedestal voltage is low. Then address the LP gas side by verifying tank level, confirming valves are open, and inspecting the burner, orifice, igniter, and flame sensor for blockages or damage. Both conditions must be corrected before the refrigerator will return to normal Auto mode operation.
Is the no AC, no FL error on a Norcold refrigerator a safety concern?
The no FL fault portion of this error does carry a safety consideration, because a failed ignition sequence means unburned LP gas may have been briefly released near the burner. The control board is designed to shut off the gas valve quickly when no flame is detected, limiting exposure. However, if you suspect a gas leak or detect a propane odor, ventilate the area immediately and do not attempt to operate the refrigerator until the gas supply and burner system have been inspected and confirmed safe.
Will resetting the Norcold refrigerator clear the no AC, no FL fault?
A reset may temporarily clear the fault display, but the underlying conditions will cause the faults to return if they are not corrected. If AC voltage remains below 85 VAC or the LP burner still cannot establish a flame, the refrigerator will cycle through the same failure sequence and log the errors again. Resetting is useful for confirming whether a fault was intermittent, but it is not a substitute for diagnosing and repairing the root causes.
How much does it cost to repair a Norcold refrigerator showing no AC, no FL?
Repair costs vary widely depending on which components need attention. Resolving a low voltage issue may cost nothing if it is a simple campground or cord problem, or it may require converter or inverter service ranging from roughly 100 to 400 dollars. LP ignition repairs such as cleaning the burner or replacing an igniter or flame sensor typically range from 50 to 200 dollars in parts. If the power control board requires replacement, costs can range from 200 to 500 dollars or more depending on the specific board and labor involved.

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