Gas failure

Alde Furnace: “Gas failure”

warning RV furnace fault codes

Safety This is an LPG appliance. If you smell gas, shut off the cylinder immediately, do not operate switches or create sparks, and ventilate the area. Do not repeatedly retry ignition with the gas on, as unburned LPG can accumulate. Have any suspected gas leak checked by a qualified gas technician.

What it means

The boiler tried to ignite the LPG burner but did not establish a flame, or it ran out of gas. The control panel reports that gas heating could not start.

Most likely causes

LPG cylinder empty or shut off most likely
Gas isolation valve closed, or regulator/valve frozen in cold weather common
Wrong gas type or a regulator fault less common
Ignition or gas valve fault in the boiler less common

Safe checks you can do yourself

Check that the LPG cylinder is not empty and the bottle valve is open
Try a different, known-full propane cylinder
Confirm all gas isolation valves are open and the regulator is not frozen or iced over
Verify the gas supply is propane as required

How to reset / clear Gas failure

Restore the gas supply (open valves, swap to a full propane bottle)
Reset from the panel: disconnect the panel from the boiler, remove 230V, and disconnect 12V from the boiler
Reconnect power and restart the boiler on gas

When to call a technician

If the gas supply is confirmed good and valves are open but the boiler still will not ignite on gas, or if you suspect a gas leak, regulator fault or ignition fault, contact an Alde dealer or qualified gas technician.

Applies to

Alde Compact 3020 HE

FAQ

What does Alde Furnace code "Gas failure" mean?

The boiler tried to ignite the LPG burner but did not establish a flame, or it ran out of gas. The control panel reports that gas heating could not start.

How do I reset Alde Furnace Gas failure?

Restore the gas supply (open valves, swap to a full propane bottle) Reset from the panel: disconnect the panel from the boiler, remove 230V, and disconnect 12V from the boiler Reconnect power and restart the boiler on gas

What is the most common cause of Gas failure on a Alde Furnace?

The most likely cause is lpg cylinder empty or shut off.

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Sources

Operating Instructions – Alde Compact 3020 HE — Section 9:1 Error Messages – Gas failure (Alde International)

Note: Error messages appear as text on the Alde touch panel and are only shown when the panel is in standby; transient messages can appear briefly when 230V or 12V is disconnected and can be disregarded if no real fault exists.

● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.