Error 152 — Closed EEV of indoor unit (2nd detection)

What does 152 mean?

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

• Faulty EEV valve
• Control system malfunction preventing EEV opening
• Blockage in the refrigerant line
• Electrical fault to the EEV

Click steps to track your progress.

1. 1

   Perform a full power cycle of the HVAC system by cutting power at the circuit breaker.

2. 2

   Allow the unit to remain unpowered for several minutes to ensure a complete reset.

3. 3

   Switch the power back on and monitor the system for normal operation.

4. 4

   If the EEV remains closed, it could indicate an electrical or mechanical failure of the valve or a related component.

5. 5

   Contact a qualified HVAC technician, as this fault requires specialized diagnostic tools and expertise.