1501 <1501> (U2) Closed valve in cooling mode

What does 1501 <1501> (U2) mean?

This error specifically occurs in cooling mode and indicates that an outdoor liquid or gas valve is closed, or the outdoor LEV (Linear Expansion Valve) is malfunctioning, causing a blockage.

• Outdoor liquid/gas valve is closed.
• Malfunction of outdoor LEV (LEV-A) (blockage).

Click steps to track your progress.

1. 1

   Turn off the power to the outdoor unit at the circuit breaker.

2. 2

   Verify that all outdoor liquid and gas valves are fully open.

3. 3

   Wait 5 minutes, then restore power to the unit.

4. 4

   If the error persists, there may be a blockage in the LEV-A, which requires professional inspection.

5. 5

   Contact a qualified HVAC technician to check the LEV (Linear Expansion Valve) for proper operation and any blockages.