LG Dryer: thermostat keeps blowing

Professional Repair Guide

What is this symptom?

Experiencing issues with your LG dryer? If the thermostat keeps blowing, it may lead to overheating and improper heating. This common problem can stem from restricted airflow, a faulty thermostat, or issues with the heating element. Addressing these causes promptly is crucial to restore your dryer’s functionality.

Urgency: High

Important Tips for LG Models

  • LG dryers may have specific thermostat and thermistor configurations; ensure replacement parts match model numbers.

Possible Causes

Blocked or restricted airflow causing overheating

How to Identify: Dryer overheats, cycles stop prematurely, lint buildup visible in filter or vent, reduced exhaust airflow at outside vent.

Part: Dryer vent system (vent hose, exhaust duct) and lint filter

Faulty cycling thermostat/high-limit thermostat

How to Identify: Thermostat fails continuity test with multimeter, repeated blowing even when airflow is normal, dryer overheats quickly.

Part: Cycling thermostat (temperature regulator) / High-limit thermostat

Faulty heating element causing continuous heat

How to Identify: Element shows short or continuity when it shouldn’t, coil may touch housing, dryer stays hot constantly.

Part: Heating element assembly

Lint/wrap around thermal fuse or blower wheel sensor causing false overheating

How to Identify: Lint accumulation near thermal devices, observable blockage around blower wheel, thermal fuse blows but airflow checking reveals debris.

Part: Thermal fuse / blower wheel area

Electrical short or control board relay stuck supplying heat

How to Identify: Intermittent or erratic heat, tests show control signals to heating element staying on when they shouldn’t.

Part: Control board or relays

DIY Solutions

Clean dryer vents and airflow paths

Moderate 30–90 minutes
Tools Needed: vacuum with hose, dryer vent brush kit, screwdriver (if needed)
  1. Unplug the dryer.
  2. Remove and clean the lint filter.
  3. Detach the dryer vent hose from the back of the dryer.
  4. Use a vent brush and vacuum to clear lint from the hose and vent duct to outside.
  5. Reattach vent hose securely and test dryer to verify airflow normalizes.
⚠️ Safety First: Ensure dryer is unplugged before interfacing internal ducts

Test and replace thermostat/thermal cutout

Advanced 60–120 minutes
Tools Needed: multimeter, replacement thermostat/thermal cutout part, screwdrivers
  1. Unplug dryer and access the thermostat/thermal fuse area (usually near heating element).
  2. Use a multimeter to test continuity of thermostats; no continuity at room temp indicates failure.
  3. Remove faulty thermostat/thermal fuse and install matching replacement.
  4. Reassemble dryer and test under controlled conditions.
⚠️ Safety First: Ensure correct replacement part

Next step

Choose the next step for thermostat keeps blowing

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Check during diagnosis

Most relevant component to inspect

Dryer Lint Filter

Captures lint from exhaust air before it reaches the dryer vent path.

Typical part-only price
$15 - $55
DIY difficulty
Easy
Estimated time
5 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Thermostat

Regulates temperature by turning the heating or cooling system on or off.

$15 - $40 · Easy · 15-30 mins

Check fit & price
Possible related component

Heating Element

Heats the water or air inside the appliance to the required temperature.

$40 - $95 · Medium · 30-45 mins

Check fit & price
Possible related component

Thermal Fuse

A safety device that cuts off power to the appliance if it starts to overheat.

$10 - $20 · Easy · 10-20 mins

Check fit & price
Model number required

Model-compatible Dryer parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Dryer Vent Cleaning Kit

Helps remove routine lint buildup from an accessible dryer vent path. It does not diagnose or repair an E-code or failed component.

View maintenance supply
Maintenance supply

Lint Trap Cleaning Brush

A narrow brush for routine cleaning around an accessible lint screen and housing.

View maintenance supply
Maintenance supply

Dryer Vent Hose Kit

A replacement exhaust duct option for visibly crushed or damaged external venting. Check diameter, length, local code, and installation clearance.

View maintenance supply

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Professional Repairs

Replace heating element assembly

Estimated Cost: $50 - $150

Diagnose/control board repair or replacement

Estimated Cost: $150 - $350+

When to Call a Professional

If the cause isn’t clear after vent cleaning and thermostat checks
If testing reveals electrical control faults
If accessing internal components is beyond DIY skill level

Preventive Maintenance

  • Clean lint filter: Airflow restriction and overheating
    Frequency: After every load
  • Clean dryer vent and duct: Heat buildup that causes thermostat/fuse trips
    Frequency: Annually or when airflow reduces

Frequently Asked Questions

Why is my LG Dryer Thermostat keeps blowing?
Common causes include blocked airflow, faulty thermostats, or a heating element malfunction.
How do I fix LG Dryer Thermostat keeps blowing myself?
Clean dryer vents and test/replace the thermostat or thermal cutout.
How much does it cost to fix Thermostat keeps blowing?
Professional repair costs range from $50 to $350+, depending on the issue.
When should I call a technician for Thermostat keeps blowing?
Call a technician if DIY fixes don't solve the issue or if you're unsure about repairs.

References & Sources

Community Analytical Insights

Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions

Common Issues Reported by Users

  • Blocked venting system causing overheating
  • Faulty thermostat or cycling thermostat malfunction
  • Defective heating element leading to excessive heat

User Suggested Solutions

  1. Check and clean the venting system. Disconnect the dryer from power, remove the vent hose, and inspect for lint buildup. Clean the vent thoroughly using a vacuum or brush. Reattach and test the dryer.

  2. Test and replace the thermostat if faulty. Use a multimeter to check for continuity. If there is no continuity, replace the thermostat with a new one. Ensure the dryer is unplugged during this process.

  3. Inspect and replace the heating element if defective. Disconnect the dryer, remove the back panel, and test the heating element for shorts or breaks. Replace if necessary.

Limited-source guidance; percentages and success-rate claims are not shown
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

  1. lg dryer keeps blowing thermostat constantly

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