LG Heat Pump Error Code E306

E306 indicates that the COND-OUT 1 sensor, which measures refrigerant temperature at the condenser outlet, has been detected as separated or broken away from its mounting position. The control board can no longer receive reliable temperature data from that point, so it triggers this fault code. The first step is to physically inspect the sensor and reseat it if it has come loose.

It is not advisable to continue operating the heat pump while E306 is active. Without accurate condenser outlet temperature data, the system cannot properly regulate refrigerant flow or protect the compressor from abnormal operating conditions. Running the unit in this state could lead to reduced efficiency or potential damage to other components.

If the sensor has simply come loose and only requires repositioning, the repair cost may be limited to a service call fee, typically in the range of $75 to $150 depending on your area. If the sensor or its retaining hardware needs replacement, parts and labor combined could range from $100 to $300 or more. A technician can provide a specific estimate after inspecting the unit.

In many cases, yes. If the sensor has simply come loose from its mounting clip on the condenser outlet line, you can reposition it and secure it back in place without specialized tools. However, if the retaining hardware is broken or the sensor itself needs replacement, additional parts and some comfort with HVAC components will be required. If you are unsure about working inside the heat pump cabinet, contact a qualified technician.

A reset may temporarily clear the fault display, but the error will return if the underlying cause has not been addressed. The COND-OUT 1 sensor must be physically inspected, repositioned if dislodged, and confirmed to be delivering stable readings before the system will operate normally. Always resolve the root cause before relying on a reset.