Error E57 / Outdoor Red LED Flashes Once — Refrigerant leak or shortage

What does E57 / Outdoor Red LED 1 flash mean?

Error E57, indicated by one flash of the outdoor unit's red LED, means there is a refrigerant leak or a shortage of refrigerant in the system (specifically for FDCVA151-251 models).

• Refrigerant leak or shortage of refrigerant (FDCVA151-251)

Click steps to track your progress.

1. 1

   Turn off the air conditioner system to prevent further damage.

2. 2

   Listen for any hissing sounds near the outdoor unit or refrigerant lines, which might indicate a leak.

3. 3

   Visually check refrigerant lines for any oily residue, a common sign of a leak.

4. 4

   Do not attempt to add refrigerant yourself; this requires specific tools and licensed professionals.

5. 5

   Contact a qualified HVAC technician immediately to detect and repair the leak, and to recharge the system.