Daewoo Air Conditioner Error Code 2 blinks (ON lamp)

The 2 blinks (ON lamp) error on a Daewoo air conditioner signals a fault within the compressor circuit or indicates a refrigerant gas leak. This code is notable because the unit continues operating rather than shutting down completely, which means the system has detected an abnormal condition but has not yet reached a threshold that forces a full lockout. The ON lamp flashing twice in a repeating pattern is the control board's way of flagging that the compressor or its associated electrical components require attention.

The compressor electrical components involved in this fault include the run capacitor, start capacitor (if equipped), compressor contactor or relay, thermal overload protector, and the compressor motor windings themselves. A failure or degraded performance in any of these parts can trigger this error. A refrigerant leak is the other primary cause: when refrigerant charge drops below an acceptable level, the compressor can overheat or operate under abnormal suction and discharge pressures, which the system interprets as a compressor-related fault.

Diagnosis should begin with a visual and electrical inspection of the compressor and its wiring harness, checking for burnt connectors, damaged insulation, or failed capacitors. Refrigerant pressure should be checked using manifold gauges to confirm the system is holding proper charge. If a leak is suspected, a refrigerant leak detector or UV dye inspection can help locate the breach point. Because the unit continues running during this fault, continued operation with low refrigerant or a failing compressor can cause additional damage if the root cause is not corrected promptly.