LG Dryer Error Code 1 Flash

The 1 Flash code on an LG gas dryer signals that the burner failed to ignite or that the control board did not receive confirmation of a flame during the heating cycle. The most common causes are a closed gas shutoff valve, air in the gas line, a flame sensor fouled with aluminum oxide, or incorrect gas supply pressure. The dryer will not produce heat until the underlying issue is resolved.

The 1 Flash code itself means the dryer detected a no-flame condition and stopped attempting to heat, which is a normal protective response. However, if you suspect a gas leak rather than a supply or sensor issue, do not attempt any repairs. Leave the home, avoid operating any electrical switches, and contact your gas utility provider immediately.

If the fix is simply opening a gas valve or purging air from the line, there is no parts cost, though a service call fee may apply if you hire a technician. Flame sensor replacement parts typically range from around $15 to $50 depending on the model, with total repair costs including labor running anywhere from $75 to $200 or more. If the issue is gas pressure related, your gas utility company may address the supply side at no charge, while internal appliance adjustments would still carry a labor cost.

Start by confirming the gas shutoff valve is fully open and that other gas appliances in your home are working, which rules out a supply interruption. If gas supply is confirmed, try purging air from the line by running a nearby gas appliance for a few minutes, then restart the dryer. If the code persists, inspect the flame sensor for an aluminum oxide buildup and clean or replace it as needed. For suspected gas pressure issues, contact a technician with a manometer to measure and verify the supply pressure.

A reset may temporarily clear the code, but it will return if the underlying cause is not addressed. The code is triggered by a functional failure in the ignition or gas supply system, not by a random control glitch. Resetting without fixing the root cause means the dryer will simply fail to heat again and display the error on the next cycle.