Error 151 — Opened EEV of indoor unit (2nd detection)

¿Qué significa 151 ?

The Electronic Expansion Valve (EEV) in the indoor unit is detected as being open when it should be closed or regulating. This is a confirmed issue, preventing proper refrigerant control.

• Malfunctioning EEV valve
• Control board issue affecting EEV operation
• Refrigerant pressure imbalance
• Faulty EEV motor or sensor

Haga clic en los pasos para seguir su progreso.

1. 1

   Power off the entire HVAC system at the main circuit breaker.

2. 2

   Wait for a few minutes (at least 5-10 minutes) for the system to fully reset.

3. 3

   Restore power and observe if the error clears and the system operates normally.

4. 4

   If the error persists, there may be a mechanical or electrical fault with the EEV or its control.

5. 5

   This issue typically requires diagnosis and repair by a certified HVAC technician.