LG HVAC Error Code E561

E561 indicates a Supply Air fan motor error. Specifically, the system has detected that the SA fan motor RPM dropped below 120 RPM for approximately 40 seconds. The unit shuts down to prevent damage, and the fault is logged to alert a technician that the fan motor or its associated wiring and connectors need to be inspected.

No, the system will typically shut itself down when E561 is triggered, and you should not attempt to override this protection. Operating the unit with a non-functioning supply air fan can cause the heat exchanger or evaporator coil to overheat or freeze, potentially leading to more extensive and costly damage. Leave the unit off until the fault is diagnosed and repaired.

Repair costs vary depending on the cause. If the fix is simply reseating the CN74 connector, a service call fee in the range of $75 to $150 may be the only cost. If the supply air fan motor requires replacement, total costs including parts and labor typically range from $200 to $600 or more depending on the unit model and local labor rates. Getting a diagnostic quote from a certified technician before authorizing parts replacement is advisable.

Start by checking whether the motor connector CN74 has become disconnected or loose from the PCB, as this is the most common and simplest cause. If the connector is secure, further diagnosis should include inspecting the fan wheel for obstructions, testing the wiring harness for continuity, and evaluating the motor itself for bearing or winding failure. More involved repairs such as motor replacement should be performed by a qualified HVAC technician.

A power reset may temporarily clear the error display, but the code will return if the underlying cause has not been corrected. If the fan motor is mechanically seized, the connector is loose, or the wiring is damaged, the condition that triggered E561 will persist and the fault will reappear within 40 seconds of the motor failing to reach 120 RPM. Always address the root cause before assuming the error is resolved.