LG Refrigerator Error Code Pantry Room DAMPER HEATER Error

This error means the refrigerator's main control board has detected a fault in the pantry room damper heater circuit. The fault can be an open circuit, a short circuit, a wiring disconnection, or a contact failure at the connector housing. The damper heater keeps the pantry air vent from freezing, so this error can lead to temperature control problems in the pantry compartment.

This error is not typically a safety hazard in the immediate sense, but it should be addressed promptly. A failed damper heater can allow the damper to freeze shut, causing the pantry compartment to lose temperature control. Food stored in the pantry section may spoil if the issue is left unresolved for an extended period.

Repair costs vary depending on what component has failed. If only the connector or wiring needs attention, costs may be minimal, generally in the range of $20 to $80 for parts and labor. If the damper heater element requires replacement, parts and professional labor typically range from $100 to $250. Main PCB replacement, which is only needed in cases of a confirmed short circuit damaging the board, can bring total costs higher.

Start by disconnecting the main PCB connector CN91 and measuring resistance between the Black and Brown wires. The reading should be 145 ohms plus or minus 7 percent. If the reading is outside this range, the heater element needs replacement. If the reading is correct, inspect the CN91 connector and wiring harness for loose terminals, corrosion, cracked housing, or broken wires and repair as needed.

A power reset may temporarily clear the error code from the display, but the fault will return if the underlying problem is not repaired. The control board continuously monitors the damper heater circuit, so any open circuit, short, or high-resistance connection will trigger the error again after the reset. A proper resistance measurement and physical inspection are necessary for a lasting repair.