LG Dryer Error Code dS

The dS code on an LG dryer indicates that the thermistor, the component that monitors temperature during the drying cycle, is either open or shorted. In both cases the control board is receiving an invalid signal and cannot safely regulate heat. The dryer will not run normally until the fault is resolved.

You should not continue running the dryer while the dS code is active. The thermistor is the control board's only way to monitor drum or exhaust temperature, and without a valid reading the dryer cannot prevent overheating. Continued use without a functioning thermistor creates a potential fire hazard and should be avoided until the fault is repaired.

If only the thermistor needs replacement, the part itself typically costs in the range of $15 to $50 depending on the specific model. If you hire a technician for the repair, expect total costs including labor to fall somewhere in the range of $100 to $200. If the control board is also found to be faulty, costs will be higher, often ranging from $150 to $350 or more for parts and labor combined.

Replacing a thermistor is a repair that many experienced DIYers can handle, as the part is typically accessible after removing the back panel or drum assembly depending on the model. The key steps are disconnecting power, locating the thermistor, confirming it is the source of the fault, and installing a replacement. If the new thermistor does not clear the code, the wiring harness or control board should be inspected, which may require a professional technician.

Unplugging the dryer for a few minutes and restoring power may temporarily clear the code, but the dS fault will return as soon as the control board checks the thermistor circuit again and detects the open or short condition. A reset does not repair a failed thermistor, so the underlying component issue must be addressed for the code to stay cleared.