Red 7 Flashes, Green 4 Flashes (Single System) — 4-Way Valve Abnormal

What does Red 7 Flashes, Green 4 Flashes mean?

The red LED flashes seven times and the green LED flashes four times on the indoor unit. This indicates an abnormality with the 4-way valve, which controls the direction of refrigerant flow for heating and cooling modes.

• Malfunctioning 4-way valve solenoid.
• Stuck or damaged 4-way valve.
• Electrical issue with the valve's control circuit.

Click steps to track your progress.

1. 1

   Power cycle the air conditioner by turning it off at the circuit breaker for 30 seconds, then turning it back on.

2. 2

   Try switching between heating and cooling modes several times to see if the valve unsticks.

3. 3

   If the unit fails to switch modes or the error persists, contact an HVAC technician.

4. 4

   A faulty 4-way valve requires professional diagnosis and repair.