LG Air Conditioner Error Code 214

Error code 214 indicates a sub-cooling inlet pipe temperature sensor fault on HR unit 4. The system has detected either an open circuit or a short circuit in the sensor or its wiring. This prevents the controller from accurately reading refrigerant temperature at the sub-cooling inlet, which can affect heat recovery system operation.

Continuing to run the system with an active sensor fault can cause the HR unit to operate outside intended parameters, potentially leading to reduced efficiency or further component stress. It is advisable to address the fault promptly rather than running the unit indefinitely in a faulted state. Contact a qualified technician if the error cannot be resolved through basic connection checks.

A power reset may temporarily clear the fault code from the display, but if the underlying sensor or wiring problem has not been corrected, the error will return once the system restarts and the controller re-evaluates the sensor circuit. A reset is useful for confirming whether a fault is intermittent, but it is not a substitute for diagnosing and repairing the actual cause.

A knowledgeable DIYer can start by checking the sensor connector and lead cable for loose connections, corrosion, or visible damage, as these are the most common causes. However, testing thermistor resistance values and tracing wiring faults inside an HR unit requires familiarity with HVAC electrical diagnostics. Refrigerant-side work must be performed by a licensed technician.

If the issue is simply a loose connector, the repair may cost little beyond a service call fee, typically in the range of $75 to $150. If the temperature sensor itself needs replacement, parts and labor combined could range from $150 to $400 depending on part availability and labor rates in your area. Complex wiring repairs or control board involvement would add to that estimate.