Warning: Disconnect power before servicing.
ErrBase

Lg Dryer Not Heating: Causes and Fixes

Quick Answer

LG dryers with Direct Drive use a flow sense indicator that warns of restricted airflow BEFORE the thermal fuse blows. If your LG dryer shows the Flow Sense light but still heats, clean the vent immediately.

LG dryers with Direct Drive use a flow sense indicator that warns of restricted airflow BEFORE the thermal fuse blows. If your LG dryer shows the Flow Sense light but still heats, clean the vent immediately. LG dryers also use a dual-element heating system on some models where either element can fail independently.

LgDryerSeverity: mediumDifficulty: intermediate75% DIY Success
Time to Fix
15–90 min
Difficulty
intermediate
Parts Cost
—
Tools Needed
Multimeter, Screwdriver set

What Does the NOT-HEATING Code Mean?

Lg dryer not heating - see the detailed diagnosis steps below for Lg-specific causes and fixes.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

Vent blocked - thermal fuse blown30%
Heating element burned out20%
Gas igniter weak15%
Cycling thermostat failed15%
Gas valve solenoid10%
Timer not advancing10%

Symptoms You May Notice

  • Not Heating on Lg dryer
  • Performance degradation
  • Unusual sounds or behavior
  • Error code may appear

Can you reset a Lg dryer to clear the NOT-HEATING code?

Unplug for 60 seconds. Some Lg models have specific reset sequences - check the diagnostic mode entry above.

Tools Required for Diagnosis

MultimeterScrewdriver setFlashlight

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

1

Check the most common Lg-specific cause for not heating on Lg dryers

Check the most common Lg-specific cause for not heating on Lg dryers. See the detailed guide above.

2

Check secondary causes common across all dryer brands but with

3

If basic checks do not reveal the cause, run the brand

Frequently Asked Questions

How much does it cost to fix a Lg dryer not heating?
Most Lg dryer not heating repairs cost $100-400 depending on the cause. Simple fixes (cleaning, resetting) are free. Part replacements range from $10-200 plus $100-200 labor.
Is it worth repairing a Lg dryer not heating?
If the dryer is under 8 years old and the repair is under 50% of replacement cost, repair is worthwhile. Lg extended the Linear Compressor warranty to 10 years on refrigerators.
Can I fix Lg dryer not heating myself?
Many Lg dryer issues are DIY-fixable with basic tools. Gas components should always be serviced by a professional.

Same Fix Works on These Brands

Lg shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

Lg washerLG Washer Error Codes: Complete List With Fixes (2026)Lg washerLG Washer LE Error: Why the Motor Locked Up (Fix It Fast)Lg washerSUD on Your LG Washer? Too Many Suds (Here's the Real Fix)Lg washerLG Washer OE Code: Water Won't Drain (Troubleshooting Guide)Lg washerHow to Reset an LG Washer (Every Method, Every Model)Lg washerFE Code on LG Washer: Overfilling and How to Stop It

Models Known to Experience NOT-HEATING Errors

This repair applies to most Lg dryers with this error code. Common model numbers include:

DLEX3900W, DLE7300WE, DLGX3901W

Last verified for technical accuracy on March 15, 2026