LG Oven: not heating properly

Possible Causes

Faulty heating element (electric ovens)

How to Identify: Element doesn’t glow or shows visible damage like blisters or breaks when oven is on; oven fails to heat to set temperature

Part: Bake and/or broil heating element

Weak or failed igniter (gas ovens)

How to Identify: Igniter glows weakly or not at all and gas flame fails to light within normal time; oven won’t heat

Part: Gas oven igniter

Faulty temperature sensor

How to Identify: Temperature fluctuates wildly or oven overshoots/undershoots target; sensor may fail continuity test

Part: Oven temperature sensor

Control board or electronic control failure

How to Identify: Oven displays errors, controls unresponsive, and voltage not reaching heating components when tested

Part: Oven control board

Poor door seal or misaligned door causing heat loss

How to Identify: Oven fails to maintain temperature and heat visibly escapes around door; gasket damaged or compressed

Part: Oven door gasket

DIY Solutions

Inspect and replace heating element (electric oven)

Moderate 30-60 minutes

Tools Needed: screwdriver, multimeter

1. Disconnect power at breaker
2. Remove oven racks to access the heating element
3. Visually inspect and use a multimeter to test element continuity
4. If faulty, remove screws, disconnect wires, and fit a new element
5. Reassemble and restore power to test oven heating

⚠️ Safety First: Always shut off power before working inside oven

Check and replace weak/broken igniter (gas oven)

Advanced 60-90 minutes

Tools Needed: screwdriver, multimeter

1. Turn off gas supply and power
2. Remove bottom panel and locate oven igniter
3. Test using multimeter for continuity and observe glow behavior
4. If weak or no continuity, disconnect and replace igniter
5. Reassemble components and restore gas/power to test

⚠️ Safety First: Turn off gas supply

Test and replace temperature sensor

Moderate 30-60 minutes

Tools Needed: multimeter, screwdriver

1. Disconnect power
2. Locate temperature sensor inside oven cavity
3. Remove and test sensor for correct resistance
4. Replace sensor if out of spec and reassemble
5. Restore power and test temperature performance

⚠️ Safety First: Power must be off before testing

Next step

Choose the next step for not heating properly

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

Apply

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

Hot Surface Igniter

Heats until it can ignite gas released by the burner valve in ovens and gas dryers.

$20 - $65 · Medium · 20-45 mins

Check fit & price

Possible related component

Temperature Sensor

Monitors the internal temperature to ensure correct operation and prevent overheating.

$15 - $35 · Easy · 15-30 mins

Check fit & price

Possible related component

Main Control Board

The central brain of the appliance that controls all components, cycles, and timings.

$120 - $280 · Medium · 20-40 mins

Check fit & price

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

Control board or electronic control module replacement

Estimated Cost: $150 - $400

Door gasket replacement

Estimated Cost: $30 - $100

When to Call a Professional

Electrical odors or burning smell from oven controls

Gas smell or ignition failure after basic checks

Control board or wiring diagnosis beyond simple part replacements

After replacing multiple parts and oven still doesn’t heat

Preventive Maintenance

• Visual inspection of heating elements and sensor: Early detection of wear or damage that can impair heating
  Frequency: annually
• Clean door gasket and inspect seal: Heat loss due to poor oven seal
  Frequency: 6 months

Frequently Asked Questions

Why is my LG Oven not heating properly?

Common causes include a faulty heating element (electric) or a weak igniter (gas).

How do I fix LG Oven not heating properly myself?

You can inspect and replace the heating element or check the igniter for continuity.

How much does it cost to fix not heating properly?

Professional repairs can cost between $150 and $400 for control board issues.

When should I call a technician for not heating properly?

If DIY repairs seem complex or the issue persists, it's best to consult a professional.

References & Sources

• LG Range – Troubleshooting an Oven That Is Not Heating Official

Common Issues Reported by Users

• Faulty control board (2 mentions)
• Defective heating elements (2 mentions)
• Electrical issues (wiring, power supply) (1 mentions)

User Suggested Solutions

1. Replaced power cord, receptacle, feed wire, and breaker.

2. Replace temperature sensor or control board.

3. Replace range oven relay control board or heating elements.

Community Discussions

takes a long time to heat up

Replaced power cord, receptacle, feed wire, and breaker.

Pro needed View on Reddit →

Source: Reddit r/appliancerepair