LG Heat Pump Error Code CH26

CH26 is a DC compressor position detection error. It means the system's Intelligent Power Module cannot determine the rotor position of the inverter-driven compressor, so it halts operation to prevent damage. The fault can originate from the U, V, or W wiring connections, the IPM, the position detection circuit, or the compressor windings themselves.

No. When CH26 is active the system will not allow the compressor to run, so attempting to force operation is not productive and could mask a worsening fault. Continuing to cycle the unit repeatedly while the error persists can stress the IPM and other electrical components, potentially turning a repairable fault into a costlier one.

Repair costs vary widely depending on what component has failed. Fixing a loose or corroded wiring connection is relatively inexpensive, typically in the range of $75 to $200 for a service call. Replacing an IPM board can cost $300 to $700 or more in parts and labor. If the compressor itself has failed, replacement costs can range from $900 to over $2,000 depending on the unit size and refrigerant type involved.

A homeowner can visually inspect the area around the outdoor unit for obvious wiring damage, but actual diagnosis requires measuring compressor coil resistance and testing the IPM and detection circuit components with specialized tools. Working on high-voltage inverter components is dangerous without proper training, so professional service is strongly recommended for this error.

A power reset may temporarily clear the code and allow the unit to attempt a restart, but if the underlying fault in the wiring, IPM, or compressor windings is still present, CH26 will return quickly. A reset is useful as a first step to confirm the fault is persistent, but it is not a repair and should not substitute for proper diagnosis.