U2 - Abnormal high discharging temperature or inner thermostat (49C) operation in outdoor unit

Was bedeutet U2 ?

This error indicates that the outdoor unit is experiencing an abnormally high discharge temperature, or the inner thermostat (49C) has activated as a safety measure.

• Insufficient refrigerant charge (low refrigerant).
• Dirty outdoor coil restricting airflow.
• Malfunctioning outdoor fan.
• Clogged or restricted refrigerant lines.
• Faulty discharge temperature sensor or inner thermostat.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   Check the outdoor unit for any obstructions blocking airflow to the coil. Clear any debris.

2. 2

   Ensure the outdoor fan is running freely and not obstructed.

3. 3

   Turn off the unit at the circuit breaker, wait 30 seconds, and turn it back on to reset.

4. 4

   If the problem persists, contact a qualified HVAC technician to check refrigerant levels and sensor operation.