Code 26 — Fan Coil Invalid Heater Size

What does 26 mean?

This fault indicates that the Fan Coil unit's control system has detected an incorrect or incompatible heater size. This could prevent proper heating operation.

• Incorrect electric heater coil installed for the fan coil model
• Misconfiguration of heater size settings on the control board
• Faulty control board reading
• Wiring error to the heater

Click steps to track your progress.

1. 1

   Turn off power to the fan coil unit at the circuit breaker for at least 30 seconds.

2. 2

   Restore power and observe if the fault clears.

3. 3

   Ensure all filters are clean and air vents are open, allowing proper airflow.

4. 4

   If the problem persists, contact a qualified HVAC technician to verify the heater size and control board settings.