Fujitsu Mini Split Error Code 22: How to Fix It

Q: What does Fujitsu error code 22 mean?

Error code 22 indicates a malfunction with the indoor heat exchanger middle temperature sensor. This sensor monitors the evaporator coil temperature and helps the system maintain proper cooling and heating operation.

Q: Can I still use my Fujitsu mini split with error code 22?

While the unit may still operate, it's not recommended to continue use with this error code as it can lead to inefficient operation, poor temperature control, and potential damage to other components. Address the issue promptly.

Q: How much does it cost to replace a Fujitsu mini split temperature sensor?

A replacement temperature sensor typically costs between $30-80 for the part, plus $100-200 for professional installation. DIY replacement can save on labor costs if you're comfortable with basic electrical work.

Q: Why does my Fujitsu mini split keep showing error code 22?

Recurring error code 22 can be caused by a faulty temperature sensor, damaged wiring, poor airflow due to dirty filters, or in rare cases, a malfunctioning control board. Start with basic maintenance before replacing components.

Q: How long does a mini split temperature sensor last?

Temperature sensors typically last 8-12 years under normal operating conditions. Factors like humidity, electrical surges, and poor maintenance can reduce their lifespan. Regular system maintenance helps extend component life.

Abstract

Fujitsu mini split error code 22 indicates a problem with the indoor heat exchanger middle temperature sensor. This sensor monitors the temperature of the evaporator coil to ensure proper cooling and heating operation, and when it malfunctions, your unit may not maintain the desired temperature or may shut down completely.