Lg Oven: not heating accurately

Professional Repair Guide

What is this symptom?

Is your LG oven not heating accurately? This common issue can lead to overcooked or undercooked meals due to temperature fluctuations. Whether the culprit is a faulty temperature sensor, a failing heating element, or a malfunctioning control board, it's crucial to address these problems to ensure consistent cooking results.

Urgency: Medium

Important Tips for Lg Models

  • LG official guidance notes adjusting thermostat calibration is an available option for ovens with display controls.

Possible Causes

Faulty temperature sensor

How to Identify: Actual internal temperature significantly differs from set temperature when measured with an oven thermometer; sensor misalignment or visible damage.

Part: Oven temperature sensor (thermistor)

Heating element failure (electric models)

How to Identify: Burn marks, cracks, or lack of red glow from the heating element; uneven heat distribution inside oven cavity.

Part: Bake/broil heating element

Control board or oven control module malfunction

How to Identify: Temperature readings erratic, diagnostics unavailable, or component not activating heating circuits properly; no response to calibration.

Part: Electronic control board/module

Calibration drift

How to Identify: Temperature consistently off by a predictable offset, but heating is otherwise normal.

Part: Internal thermostat calibration

Weak or failing igniter (gas models only)

How to Identify: Long preheat times, flame weak or intermittent, temperature dropping before burner reignites.

Part: Gas igniter

DIY Solutions

Verify and calibrate oven temperature

Easy 10-20 minutes
Tools Needed: Oven thermometer
  1. Place an oven thermometer inside the oven centered at rack level.
  2. Preheat the oven to a known temperature.
  3. Compare the thermometer reading to the oven's set temperature.
  4. If a consistent offset exists, adjust the oven’s temperature calibration per manufacturer instructions.
⚠️ Safety First: Do not touch heating elements while hot.

Inspect and test temperature sensor with multimeter

Moderate 30-60 minutes
Tools Needed: Multimeter, Screwdriver, Oven thermometer
  1. Disconnect power to the oven.
  2. Remove oven racks and locate the temperature sensor inside the oven.
  3. Unscrew and gently disconnect the sensor wiring.
  4. Test resistance with a multimeter and compare against manufacturer spec.
  5. Replace the sensor if resistance is drastically off or open circuit.
⚠️ Safety First: Ensure power is off to avoid electrical shock.

Visual inspection of heating elements

Easy 10-20 minutes
Tools Needed: None
  1. Ensure oven is cool and power is off.
  2. Inspect bake and broil elements for cracks, blisters, or breaks.
  3. Replace elements showing visible damage.
⚠️ Safety First: Disconnect power before inspection.

Professional Repairs

Replace electronic control board

Estimated Cost: $150 - $350

Replace igniter in gas ovens

Estimated Cost: $100 - $250

When to Call a Professional

Temperature remains inaccurate after replacing sensor and recalibration
Control board suspected to be defective
Electrical wiring or component faults detected during DIY troubleshooting

Preventive Maintenance

  • Use an oven thermometer periodically to verify calibration: Drift in temperature accuracy
    Frequency: monthly
  • Inspect heating elements for signs of wear: Element failures leading to inaccurate heating
    Frequency: every 6 months

Frequently Asked Questions

Why is my LG Oven not heating accurately?
Common causes include a faulty temperature sensor, heating element failure, or control board issues.
How do I fix LG Oven not heating accurately myself?
You can calibrate the oven temperature, inspect the temperature sensor, or check heating elements for damage.
How much does it cost to fix not heating accurately?
Replacing the electronic control board costs $150 - $350, while igniter replacement in gas ovens costs $100 - $250.
When should I call a technician for not heating accurately?
If DIY solutions don’t resolve the issue or if you're uncomfortable with electrical components, it's best to call a technician.

References & Sources

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

70%
DIY Success Rate Difficulty: Either

Common Issues Reported by Users

  • Faulty temperature sensor
  • Malfunctioning control board
  • Incorrect oven calibration

User Suggested Solutions

  1. Check and replace the temperature sensor if faulty. To do this, unplug the oven, remove the back panel, disconnect the sensor, and replace it with a new one. Reassemble and test the oven.

  2. Test the control board for faults. If the control board is malfunctioning, it may need to be reset or replaced. Disconnect power, access the control board, and check for burnt components. Replace if necessary.

  3. Calibrate the oven according to the manufacturer's instructions. This typically involves adjusting the temperature settings via the control panel or using a calibration tool.

Analysis based on 1 community discussions
View Sources

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

  1. New oven doesn’t accurately hit temperatures, what could be ...

Community Discussions

oven doesn’t accurately hit temperatures

Manufacturer suggested continual calibration for different temperatures.

Pro needed View on Reddit →

Source: Reddit r/appliancerepair

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