Goodman Air Conditioner Error Code L6

The L6 code means the discharge air temperature is too high, indicating the system is not cooling the air adequately before pushing it into the ductwork. This is typically caused by restricted airflow or a refrigerant-side issue. The system triggers this fault to alert you that cooling performance is compromised. Start by checking and replacing the air filter and clearing any obstructions from vents.

A reset may temporarily clear the L6 fault, but the code will return if the underlying cause is not corrected. Simply resetting the unit without addressing the airflow restriction or refrigerant issue will allow the problem to continue and could lead to further component wear. Always resolve the root cause before or alongside resetting the system.

Repair costs vary depending on the cause. A filter replacement is generally inexpensive, typically in the range of $5 to $30 for the part. Professional coil cleaning may range from $75 to $200. If the fault is related to a refrigerant leak or a failed blower motor, repair costs can range from $150 to $600 or more depending on the extent of the work and local labor rates.

Begin by replacing a dirty air filter and confirming that all return and supply vents are open and unobstructed. If airflow appears normal after those steps, inspect the evaporator coil for dirt buildup and clean it if needed. If the fault persists after restoring proper airflow, contact a licensed HVAC technician to check the refrigerant charge and metering device.

Continuing to operate the unit with an L6 fault is not recommended. Prolonged running under high discharge air temperature conditions can stress the compressor and other components, potentially leading to more costly damage. Shut the system down, address the airflow or refrigerant issue, and then resume operation.