Goodman Air Conditioner Error Code C7

Code C7 on a Goodman air conditioner means the system has detected an Indoor Coil Freezing Lockout. The control board monitors the temperature difference between the indoor coil sensor and the indoor air sensor, and when that gap exceeds 20 degrees Fahrenheit for more than 10 minutes, the unit shuts down. This protects the system from ice buildup on the evaporator coil and potential compressor damage.

A power reset may temporarily clear the C7 lockout, but the code will return if the underlying cause is not corrected. If the coil is still iced over when the system restarts, it will freeze again quickly and re-trigger the lockout. Always let the coil thaw completely and address the root cause before attempting a reset.

Repair costs vary widely depending on the cause. Replacing a dirty air filter costs only a few dollars and is a simple DIY task. If the blower motor needs replacement, costs typically range from $150 to $450 including parts and labor. A refrigerant leak repair and recharge can range from $250 to $750 or more depending on the leak location and the amount of refrigerant required. A restricted capillary tube replacement is a more involved repair that can fall in the $300 to $600 range.

Start by turning off the system and checking your air filter, replacing it if it is dirty. Allow any ice on the indoor coil to melt fully before restarting, which can take 1 to 2 hours with the fan running in fan-only mode. If the code returns after the filter is clean and the blower is confirmed to be running normally, a refrigerant issue is likely and you will need a licensed HVAC technician to check system pressure and inspect for leaks or a restricted metering device.

No, you should not attempt to force the system to run while the C7 lockout is active. Running a frozen evaporator coil can allow ice to block airflow entirely and can cause liquid refrigerant to return to the compressor, leading to compressor failure. Leave the system off until the coil has thawed and the cause has been identified and corrected.