LG Heat Pump Error Code E294

The E294 code on an LG heat pump indicates a low pressure sensor breakaway condition. This means the control board has detected that the low-pressure sensor in the refrigerant circuit has lost its connection or physically separated from its mounting point. The system typically shuts down compressor operation when this fault is active to prevent unmonitored operation.

No, you should not continue running the heat pump with E294 active. The low-pressure sensor is a safety component, and operating the system without reliable pressure monitoring can lead to compressor damage or other refrigerant circuit problems. The unit may already be preventing compressor operation as a protective measure.

A reset may temporarily clear the E294 fault from the display, but the error will return if the underlying sensor connection or wiring problem has not been resolved. Resetting without repairing the root cause does not fix the issue and leaves the low-pressure safety monitoring unreliable. A proper inspection of the sensor, connector, and harness should be completed before relying on the unit to operate normally.

Some causes of the E294 error, such as a loose wiring connector, can be addressed without specialized tools by carefully reseating the sensor connector and inspecting the harness. However, if the sensor has separated from the refrigerant circuit or a refrigerant leak is suspected, a licensed technician is required because handling refrigerants is regulated. Electrical diagnosis of the sensor and harness is a reasonable DIY task if you are comfortable working with appliance wiring.

Repair costs depend on the root cause. If the issue is simply a loose connector, a service call fee of roughly $75 to $150 may be all that is required. If the low-pressure sensor needs replacement, parts and labor together typically range from $150 to $400. If wiring harness replacement or additional refrigerant work is needed, costs can be higher.