LG Dryer Not Heating — Troubleshooting Guide

If your LG dryer runs but clothes come out damp and cold, the dryer isn't producing heat. This can be caused by a blocked vent, a failed heating element, a blown thermal fuse, or a faulty thermistor. Here's how to diagnose and fix it.

Clean the Vent System First

A clogged vent is the most common reason an LG dryer stops heating. When the exhaust can't escape, heat builds up and triggers the thermal fuse or high-limit thermostat to shut off the heating element as a safety measure. Clean the lint filter, then disconnect the vent hose from the back of the dryer and clean the entire duct to the exterior. LG dryers will display a d80, d90, or d95 code if the vent is significantly blocked.

Check the Thermal Fuse

The thermal fuse is a one-time safety device that blows when the dryer overheats. Once blown, it won't reset — it must be replaced. It's usually located on the blower housing or exhaust duct inside the dryer. Unplug the dryer and test the fuse with a multimeter for continuity. If it reads open (no continuity), replace it. Important: always find and fix the cause of the overheating (usually a clogged vent) before replacing the fuse, or the new one will blow too.

Test the Heating Element

On electric LG dryers, the heating element can burn out over time. Unplug the dryer, locate the heating element (usually behind the lower rear panel), and test it for continuity with a multimeter. If it reads open, the element needs replacement. Also visually inspect it for breaks or damage in the coil. On gas LG dryers, check the gas valve coils and igniter instead.

Check the Thermistor

The thermistor monitors the dryer's temperature. If it fails, the dryer can't regulate heat and may not turn the heater on at all. Test it with a multimeter — it should read approximately 10,000 ohms at room temperature. If the reading is significantly off, replace it. LG dryers display tE1, tE2, or tE3 error codes when a thermistor fails.