LG Dryer Not Heating — Troubleshooting Guide
Your LG dryer is running, the drum is turning, the cycle is counting down — but the clothes are coming out cold and damp. This is one of the most common dryer complaints, and in the vast majority of cases it is caused by one of a handful of inexpensive components rather than a major mechanical failure.
Step 1 — Check the Exhaust Vent First
Before assuming a part has failed, check your dryer's exhaust vent. A clogged vent is the number one cause of no-heat and poor-heat complaints on LG dryers. When the vent is blocked, the dryer overheats and the thermal fuse blows — cutting power to the heating element as a safety measure. Your LG may also display a d80 or d90 Flow Sense warning. Pull the dryer from the wall, disconnect the exhaust hose, and check for lint blockage. Run a hand in front of the exterior vent cap while the dryer runs — you should feel strong airflow.
Step 2 — Check for an Error Code on the Display
LG dryers display error codes when a sensor or component failure is detected. If your display shows tE1, tE3, or HS, that tells you exactly which component has failed. tE1 and tE3 indicate a thermistor (temperature sensor) fault and are the most direct indicators of a heat-related failure. FE and AE codes relate to motor and control board issues that can indirectly prevent heating.
Step 3 — Test the Thermal Fuse
The thermal fuse (part 6931EL3003D) is the single most common cause of a completely cold LG dryer. It is a one-time safety device located near the exhaust duct or burner, and once it blows, the dryer will not heat until it is replaced. Unplug the dryer, locate the fuse (two wires, small plastic housing), and test it with a multimeter set to continuity. A good fuse will beep; a blown fuse reads open circuit. Replacement costs $10–$20 and takes about 20 minutes. Always clean your exhaust vent before installing the new fuse to prevent it from blowing again.
Step 4 — Test the Heating Element (Electric Dryers)
If the thermal fuse tests good, the heating element itself may have failed. The heating element assembly (part 5301EL1001A) is located behind the back panel of electric LG dryers. Remove the panel, locate the coil assembly, and test continuity across the element terminals — a working element should show a low resistance reading (around 8–16 ohms). An open circuit reading (OL) means the element is burned through and must be replaced. Heating elements cost $25–$55 and the repair requires removing the back panel.
Step 5 — Test the Thermistor
If the fuse and element are both good, the thermistor (part 6323EL2001B) may have failed in a way that causes the dryer to run without heat — for example, reporting a falsely high temperature that causes the board to cut power to the element prematurely. Test the thermistor's resistance: at room temperature it should measure approximately 10,000 ohms. Out-of-range readings confirm a faulty sensor. The thermistor is one of the easiest LG dryer parts to replace — it requires only a Phillips screwdriver and costs $10–$25.
Gas Dryers: Check the Igniter and Gas Supply
On LG gas dryers, a no-heat condition is most often caused by the igniter rather than an element (since there is no element). A gas dryer igniter should glow bright orange within 30–60 seconds of the cycle starting and draw 3.2+ amps. A dim, slow-glowing igniter will not fully open the gas safety valve, and the gas will not ignite. Gas valve solenoid coil failures are another common cause and are less expensive to fix than a full valve replacement.