Goodman Air Conditioner Error Code C5

The C5 code means the outdoor coil temperature is too high for the current outdoor ambient temperature. The control board monitors both values and triggers this fault when the coil reading exceeds the expected threshold. It is most commonly caused by a dirty condenser coil or restricted airflow around the outdoor unit. The system may lock out to protect the compressor until the condition is corrected.

A power reset may temporarily clear the C5 fault and allow the unit to restart, but if the underlying condition is not resolved, the code will return. Repeatedly resetting the unit without fixing the cause risks overheating and damaging the compressor. Address the airflow or coil issue first before attempting a reset.

The cost depends on the root cause. Cleaning a dirty coil is typically a low-cost service call ranging from around $75 to $200. Replacing a condenser fan motor can range from $150 to $450 including parts and labor. If refrigerant correction or a control board replacement is needed, costs can range from $200 to $600 or more depending on the specific repair required.

Start by turning off the unit and inspecting the outdoor condenser coil for dirt, debris, or blockage on all sides. Clean the coil if needed and make sure there is adequate clearance around the unit with no obstructions. Also check that the condenser fan is spinning freely and in the correct direction. If the coil is clean and airflow is unobstructed, a technician should check the refrigerant charge and the coil temperature sensor.

It is not recommended to continue running the unit while the C5 code is active. Elevated coil and refrigerant temperatures place significant stress on the compressor, and continued operation can lead to compressor failure or other component damage. Turn the system off and diagnose the cause before restarting.