LG Oven: not heating correctly

Professional Repair Guide

What is this symptom?

Is your LG oven not heating correctly? You may notice it powers on but fails to reach the desired temperature or cooks unevenly. This common issue can disrupt your cooking plans and may be caused by a faulty heating element or electrical supply problems. Understanding these causes can help you diagnose and resolve the issue effectively.

Urgency: Medium

Important Tips for LG Models

LG offers official troubleshooting steps for ovens not heating, including calibration and checking bake/broil elements via support documentation.

Possible Causes

Faulty heating element (electric ovens)

How to Identify: Element does not glow or reach temperature; visible damage/burn marks; lacks continuity on multimeter

Part: Bake or broil heating element

Electrical supply or wiring issue

How to Identify: Oven intermittently fails to heat or displays power anomalies; tripped breaker or loose wiring present

Part: Power supply wiring/controls

DIY Solutions

Inspect and test heating element

Moderate 30–60 minutes

Tools Needed: Screwdriver, Multimeter

Disconnect power to oven
Open oven and locate heating elements.
Visually inspect for damage, and use a multimeter to test continuity.
Replace element if it shows no continuity or visible damage

⚠️ Safety First: Always disconnect power before opening oven.

Check oven temperature sensor function

Moderate 20–40 minutes

Tools Needed: Screwdriver, Multimeter, Oven thermometer

Unplug oven and locate temperature sensor inside oven cavity.
Remove sensor and test its resistance with multimeter per model specs.
Compare sensor readings with expected values.
Replace if readings are out of range

⚠️ Safety First: Ensure oven is fully powered off.

Next step

Choose the next step for not heating correctly

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

Based on diagnostic data

Most relevant component to inspect

Heating Element

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

Typical part-only price: $40 - $95
DIY difficulty: Medium
Estimated time: 30-45 mins

Optional: enter your model number

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.

Model number required

Model-compatible Oven 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

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.

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

Non-Scratch Cooktop Cleaner

A routine surface-care product. Confirm that it is approved for the specific glass, ceramic, enamel, or stainless finish.

View maintenance supply

Diagnostic tool

Oven Thermometer

A diagnostic aid for comparing cavity temperature during a controlled check. It does not prove which internal component has failed.

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 oven igniter (gas ovens)

Estimated Cost: $50 - $150 for part

Repair or replace faulty wiring/controls

Estimated Cost: $100 - $300+

When to Call a Professional

If heating element or igniter replacement is beyond DIY skill level

Gas component repair required

Electrical system checks beyond basic testing

Persistent underheating after basic troubleshooting

Preventive Maintenance

Regularly inspect and clean oven interior and heating elements: Debris buildup that can affect even heating
Frequency: Monthly
Verify calibration with an oven thermometer periodically: Temperature mismatches due to sensor drift
Frequency: Quarterly

Frequently Asked Questions

Why is my LG Oven not heating correctly?

Common causes include a faulty heating element or electrical supply issues.

How do I fix LG Oven not heating correctly myself?

Inspect the heating element and temperature sensor using a multimeter.

How much does it cost to fix not heating correctly?

Professional repairs range from $50 to $300+, depending on the issue.

When should I call a technician for not heating correctly?

If DIY solutions don't work or you're uncomfortable with repairs, call a pro.

References & Sources

LG Oven Not Heating Troubleshooting Official

Community Analytical Insights

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

Common Issues Reported by Users

Defective oven sensor (1 mentions)
Bad relay board (1 mentions)

User Suggested Solutions

Replace the oven sensor
Replace the relay board

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

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

Community Discussions

oven heats up to blazing hot temperatures regardless of set temperature

The issue is likely a bad relay board rather than the temperature sensor.

DIY View on Reddit →

oven is 70° cooler than indicated on the panel

The oven sensor may be defective.