1302 <1402> (UE) High pressure trouble

What does 1302 <1402> (UE) mean?

This error signifies an abnormally high pressure in the system. This can be caused by various factors, including closed valves, clogged pipes or filters, malfunctioning fans, dirty heat exchangers, or sensor issues.

• Defective operation of stop valve (not fully open).
• Clogged or broken pipe.
• Malfunction or locked outdoor fan motor.
• Short-cycle of outdoor unit.
• Dirt on outdoor heat exchanger.
• Remote controller transmitting error caused by noise interference.
• Contact failure of the outdoor controller board connector.
• Defective outdoor controller board.
• Short-cycle of indoor unit.
• Decreased airflow, clogged filter, or dirt on indoor unit.
• Malfunction or locked indoor fan motor.
• Decreased airflow caused by defective inspection of outdoor temperature thermistor.
• Indoor LEV performance failure.
• Malfunction of fan driving circuit.
• SV1 performance failure.
• Defective high pressure sensor.
• Defective high pressure sensor input circuit on outdoor controller board.

Click steps to track your progress.

1. 1

   Turn off the power to the entire system at the circuit breaker.

2. 2

   Ensure all stop valves are fully open.

3. 3

   Clean the outdoor unit's heat exchanger and check for any obstructions to the outdoor fan.

4. 4

   Clean or replace indoor unit air filters and ensure the indoor fan is operating correctly.

5. 5

   Verify there is adequate space around both indoor and outdoor units for proper airflow.

6. 6

   Restore power. If the issue persists, contact a qualified HVAC technician to check for refrigerant issues, sensor problems, or fan malfunctions.