Lg Ch 73 Error

Follow these steps to diagnose and potentially resolve the LG CH 73 error before calling a professional. 1. Perform a Hard Reset (Power Cycle) Often, communication errors are temporary glitches.

It typically appears on the display of:

Over time, vibration from the outdoor unit (compressor/fan) loosens the terminal screws on the communication bus. Corrosion due to humidity or pests (ants, lizards) can also interrupt the weak signal voltage (typically 0-20V DC for communication). lg ch 73 error

Loose, damaged, or corroded communication cables between the indoor and outdoor units. Follow these steps to diagnose and potentially resolve

: The rotation sensing circuit on the Printed Circuit Board (PCB) might not be detecting the fan's movement. lg ch 73 error