LG Dryers Dryer Not Heating: How to Fix It Yourself
When your LG dryer runs but does not heat up, the most common cause is a blown thermal fuse. The thermal fuse is a safety device that blows when the dryer overheats — usually because of a clogged lint vent. The fuse itself is cheap and easy to replace, but you also need to clean the vent to prevent it from happening again.
⚠️ Safety First
- Unplug the dryer before doing any work.
- If it is a gas dryer, also turn off the gas supply valve.
- Electric dryers run on 240 volts — this can kill you. Make sure it is unplugged.
- Let the dryer cool down completely before touching internal parts.
Parts You May Need
Step-by-Step Repair
- 1
Unplug the dryer
Pull the power cord from the outlet. If you have a gas dryer, turn off the gas valve behind the dryer too. Wait 10 minutes for everything to cool down.
- 2
Check your lint vent first
Before opening the dryer, disconnect the vent hose from the back and look inside. If it is packed with lint, that is likely what caused the overheating. Clean the entire vent line from the dryer to the outside of your house. A clogged vent is the number one reason thermal fuses blow.
- 3
Access the thermal fuse
Remove the back panel of the dryer (usually 4–6 screws). The thermal fuse is a small white or silver piece about 1 inch long, usually located near the exhaust duct or heating element housing. It will have two wires connected to it.
- 4
Test the thermal fuse with a multimeter
Set your multimeter to continuity mode (the setting that beeps). Disconnect the wires from the fuse and touch one multimeter probe to each terminal. If you get a beep, the fuse is fine. If you get nothing (no beep, no reading), the fuse is blown and needs replacing.
- 5
Replace the thermal fuse
Remove the one or two screws holding the old fuse. Disconnect the wires (take a photo first). Attach the wires to the new fuse and screw it in place. This takes about 2 minutes.
- 6
Reassemble and test
Put the back panel on, reconnect the vent hose, and plug the dryer in (turn gas back on if applicable). Run a timed dry cycle for 10 minutes and check that the air coming out is hot. If the dryer still does not heat, the heating element itself may need replacing.
If That Didn't Work
- Burned-out heating element
- Faulty high-limit thermostat
- Bad cycling thermostat
- Broken igniter (gas dryers)
- Defective gas valve solenoid (gas dryers)
When to Call a Professional
If you are not comfortable using a multimeter or working near 240-volt wiring, call a pro. Also call a pro if the thermal fuse keeps blowing — there may be a deeper airflow or wiring issue. Expect to pay $120–$250 for a tech visit depending on the part needed.
Related Repairs
Disclaimer: This guide is for informational and educational purposes only and does not constitute professional repair advice. All repairs are performed at your own risk. RepairItFree.com is not liable for any personal injury, property damage, device damage, voided warranties, or other losses resulting from the use of this information.
If you are unsure about any step — especially anything involving electricity, gas, water, or refrigerant — stop and consult a qualified professional. Your safety is more important than saving money.
See our full Terms of Service for complete legal details.