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Error code reference

Dometic Refrigerator Error Code LP

LP flashing (message alternates between LP and temperature) indicates gas operation lockout (flame failure)…

Dometic codesDometic refrigerator codes

LP flashing (message alternates between LP and temperature) indicates gas operation lockout (flame failure) after three unsuccessful ignition attempts.

First step from the service manual

Turn unit off, wait a few seconds and turn back on to restart ignition sequence. Check LP gas supply tanks are not empty and manual shutoff valves are turned on.

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

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What LP means on a Dometic refrigerator

The LP error code on a Dometic refrigerator indicates a gas operation lockout condition. When the unit is running on LP (liquefied petroleum) gas mode, the control board monitors the burner ignition process. If the igniter fails to establish a confirmed flame after three consecutive ignition attempts, the control board locks out gas operation and displays the LP code, alternating the message with the current temperature reading. This is a safety protection feature designed to prevent unburned gas from accumulating in the area around the refrigerator.

The ignition sequence involves the control board energizing the igniter electrode to produce a spark, opening the gas valve to allow LP flow, and then detecting the resulting flame via a thermocouple or flame sense circuit. A failure at any point in this chain can prevent flame confirmation. Common points of failure include an empty or low LP tank, a closed manual shutoff valve, a weak or misfiring igniter electrode, a fouled or cracked burner assembly, or a faulty gas valve that is not opening properly.

Because the lockout occurs after three failed attempts rather than immediately, intermittent fuel supply issues such as low tank pressure in cold temperatures or a partially closed valve are frequent culprits. Resetting the unit by powering it off and back on clears the lockout and restarts the ignition sequence. If the fault repeats consistently, a component-level diagnosis of the burner, igniter electrode, and gas valve is required to identify the root cause.

Source: manufacturer service documentation.

Common causes of LP

  1. 01

    Empty or low LP gas tank

    Wiring / connection

    If the propane tank is empty or near empty, there is insufficient fuel pressure to sustain ignition. Check the tank gauge and swap in a full tank to rule this out first.

  2. 02

    Closed or partially closed manual shutoff valve

    Wiring / connection

    The manual shutoff valve on the LP supply line must be fully open for gas to reach the burner. Inspect all inline valves between the tank and the refrigerator and confirm they are turned fully on.

  3. 03

    Fouled or blocked burner assembly

    Wiring / connection

    Insect nests, debris, or carbon buildup inside the burner tube can block gas flow or disrupt the flame pattern, preventing proper ignition. The burner and flue area should be visually inspected and cleaned if obstructions are found.

  4. 04

    Weak or failed igniter electrode

    Part replacement

    The igniter electrode produces the spark that lights the gas. A cracked electrode, excessive gap, or carbon tracking on the ceramic insulator can result in a weak spark that fails to ignite the burner. The electrode should be inspected for damage and replaced if compromised.

  5. 05

    Faulty gas valve

    Part replacement

    If the solenoid gas valve is not opening correctly during the ignition cycle, gas will not reach the burner despite a functioning igniter. A technician can verify whether the valve is receiving the correct signal from the control board and opening as commanded.

See the test procedure for each cause

Frequently asked questions about LP

What does LP mean on a Dometic refrigerator?
The LP code indicates a gas operation lockout caused by flame failure. The refrigerator attempted to ignite the propane burner three times without successfully establishing a flame, so the control board locked out gas mode as a safety measure. The display alternates between LP and the current temperature. Resetting the unit by turning it off and back on will allow the ignition sequence to restart.
How do I fix the LP error on my Dometic refrigerator?
Start by turning the unit off, waiting a few seconds, and turning it back on to reset the lockout and trigger a new ignition attempt. Before doing so, verify that the LP tank is not empty and that all manual gas shutoff valves in the supply line are fully open. If the error returns repeatedly, inspect the burner area for debris or blockages, and have the igniter electrode and gas valve checked by a technician.
Will resetting the unit clear the LP error code?
Yes, powering the refrigerator off and back on clears the lockout and allows the control board to attempt ignition again. However, resetting only addresses the lockout state, not the underlying cause. If the fuel supply and shutoff valves are in good condition but the LP code returns after the reset, a component fault in the burner system needs to be diagnosed.
Is the LP error on a Dometic refrigerator a safety concern?
The lockout itself is a safety feature, not a hazard. The control board stops ignition attempts after three failures specifically to prevent unburned propane from accumulating around the appliance. As long as the unit has locked out and is no longer attempting ignition, there is no active safety risk. If you smell gas after the lockout, ventilate the area immediately and have the gas supply system inspected before attempting a reset.
How much does it cost to repair a Dometic refrigerator showing the LP error?
If the issue is simply an empty tank or a closed valve, there is no repair cost beyond the price of a propane refill, typically in the range of a few dollars to around $30 to $60 depending on tank size. If a component such as the igniter electrode needs replacement, parts and labor can range from approximately $75 to $200 or more depending on the service provider and the specific parts required. A faulty gas valve is a more involved repair and can push costs higher.

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