LG Dryer Error Code 4 Flashes

On an LG dryer, 4 Flashes indicates an internal failure of the ignition control module. This module manages the gas burner ignition sequence, and when it detects a fault it cannot recover from, it stops operation and signals the problem with this flash pattern. The first step is to reset the dryer by unplugging it. If the error returns, the module will need to be replaced.

Start by performing a full power reset: unplug the dryer, wait several minutes, and plug it back in. If the error persists, inspect the wiring harness and connectors at the ignition control module for any damage, corrosion, or loose connections. If the wiring checks out and the error continues to appear, the ignition control module itself must be replaced, as it has no internally serviceable components.

If the error clears with a simple reset, there is no parts cost involved. If the ignition control module needs to be replaced, parts and labor costs can typically range from around $150 to $350 depending on parts availability, your region, and whether you hire a technician or complete the repair yourself. Getting a diagnostic quote from a qualified appliance repair technician before proceeding is recommended.

A reset will clear the error if the fault was caused by a temporary condition such as a power fluctuation. Unplug the dryer for a few minutes, then plug it back in and run a cycle. If the 4-flash pattern returns during or after the cycle, the ignition control module has a permanent internal fault and resetting will not resolve it.

No, you should not attempt to operate the dryer while this error is active. The 4 Flashes code indicates the ignition control module has detected an internal failure and has shut down operation as a safety measure. Running a gas dryer with a faulty ignition control module could result in improper ignition behavior. The dryer should remain out of service until the issue is diagnosed and resolved.