LG Dryer Not Heating: LG-Specific Causes and Fixes

If your LG dryer runs a full cycle but the clothes come out cool, the cause is usually one of a handful of LG-specific parts — and the fix is different depending on whether you own a gas or electric LG, and whether it's a top-control or front-control model. This guide covers the issues we actually see on LG units in the field, not generic dryer advice. For the generic dryer-not-heating diagnosis, see our universal guide.

Step 1: Read the LG error code first

LG dryers display fault codes on the LED panel and can also "speak" the fault through the SmartDiagnosis feature in the LG ThinQ app. Always read the code before opening the cabinet.

• tE / tE1 / tE2 — thermistor (temperature sensor) failure. The heater shuts off because the control board can't read a valid drum or exhaust temperature. Common on DLE/DLG-series models 5+ years old.
• D80 / D90 / D95 — duct blockage warning (80%, 90%, 95% restricted). Not a hardware failure yet, but airflow is so poor the heater will be cycling off on thermal protection. Clean the vent immediately.
• F02 / HE — heater fault (electric models). Either the heater assembly or its high-limit thermostat has opened.
• CL — child-lock active; sometimes mistaken for a failure when heat cycles are partially disabled.

Step 2: Confirm gas or electric LG — they fail differently

LG dryers ship in two variants:

• DLE-series (electric, 240V): use a one-piece heater assembly that combines the heating coil, housing, high-limit thermostat, and thermal cut-off fuse. When one fails, LG recommends replacing the whole assembly (part numbers in the 5301EL1001x family). Don't try to swap individual coils.
• DLG-series (gas, natural or LP): use an igniter, flame sensor, and dual gas valve coils. The igniter on LG gas dryers is fragile — handle by the ceramic base, never by the carbide element, or it will fail within a few cycles.

LG-specific causes in order of likelihood

1. Failed thermistor (tE codes)

The thermistor is a small temperature sensor clipped onto the heating duct. LG control boards refuse to fire the heater if the thermistor reads out-of-range, and the part fails more often on LG than on most brands. Replacement is a $20–$40 part but requires removing the rear or top panel depending on model.

2. Heater assembly failure (DLE electric models)

The LG heater assembly is a sealed unit. Symptoms: tumbles, no heat, no fault code, multimeter shows open across the heater terminals. Replace the entire assembly — LG does not service the internal components separately and aftermarket "coil only" replacements often blow the thermal fuse on the next overheat event.

3. Igniter or gas valve coils (DLG gas models)

On LG gas dryers, the igniter glows for 20–30 seconds, the flame sensor confirms it's hot, and the gas valve coils open to release gas. If you can see the igniter glow through the rear panel grille but no flame appears, the coils have failed. If the igniter never glows, replace the igniter — but use OEM, not generic, because LG's igniter mount is non-standard.

4. Vent restriction (D80/D90/D95 warning)

LG's Flow Sense system measures duct restriction and will throttle the heater to protect the assembly. A D90+ warning will cause cool-running cycles even though all hardware is functional. Clean the entire vent run — lint trap, internal blower, transition hose, and wall vent.

5. Thermal cut-off fuse on the heater housing

On DLE models, a one-shot thermal cut-off fuse on the heater assembly blows when the heater overheats — almost always due to a vent restriction. Replacing only the fuse without clearing the vent will blow the replacement within 1–3 cycles.

6. Sensor Dry contact failure

LG Sensor Dry uses two metal strips inside the drum to detect moisture. If those strips are coated with fabric softener residue, the control thinks the load is already dry and ends the cycle before heating fully. Wipe the strips with rubbing alcohol — this resolves a surprising number of "no heat" complaints on LG.

7. Main control board (last resort)

LG main boards do fail, but rarely. Replace only after the thermistor, heater assembly (or igniter/coils), and thermal fuse have all been ruled out.

What to try before calling a technician

1. Read any displayed error code or use SmartDiagnosis in the LG ThinQ app to capture the fault.
2. Clear the full vent run. LG's Flow Sense is sensitive; even partial restriction kills heat output.
3. Wipe the Sensor Dry strips inside the drum with isopropyl alcohol.
4. Check both 240V breakers on DLE electric models — a half-tripped breaker is a classic "no heat" cause.
5. Listen on DLG gas models for the igniter cycling and the burner whoosh ~30 seconds into the cycle.

Why we recommend LG-trained service

LG uses proprietary error code definitions, integrated heater assemblies, and fragile igniters that are easy to damage during installation. Generic parts and generic procedures cause repeat failures on LG more than on any other brand we service. We stock OEM LG heater assemblies, thermistors, igniters, and valve coils for the most common DLE and DLG model families.

Typical LG dryer repair costs (Bay Area)

• Thermistor replacement: $180–$240
• LG heater assembly (DLE): $320–$480
• OEM igniter (DLG): $200–$300
• Gas valve coil set (DLG): $240–$360
• Thermal cut-off fuse + vent cleaning: $220–$340

$89 diagnostic fee waived when you approve the repair. See full dryer repair cost guide →

Schedule LG dryer service

Call (510) 930-0404 or book online. Same-week appointments throughout the Bay Area; we stock OEM LG parts on the truck for the most common no-heat repairs.