How to Fix Oven temperature off by 50°F on LG LRG4115ST (Gas Range)

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Oven temperature off by 50°F

This step-by-step repair guide walks you through fixing oven temperature off by 50°F on your LG LRG4115ST (Gas Range). With the right tools and parts, you can complete this repair in 1–2 hours and avoid a costly service call.

Part of our Top 20 Oven Models & Common Repair Issues Guide. Browse all oven repair guides for related models and issues.

Common Symptoms & Causes

These signs point to an oven temperature calibration problem on your LG LRG4115ST gas range.

• Baked goods are consistently undercooked or overcooked at standard recipe temperatures
• A thermometer placed inside the oven reads 50°F lower or higher than the set temperature
• The oven takes noticeably longer than normal to preheat to 350°F
• Broiling or roasting results in unevenly cooked food despite correct rack placement

Typically, this issue arises from a faulty oven temperature sensor (RTD sensor) that has drifted out of spec over time or a control board that misreads the sensor’s resistance signal.

Safety First

• Unplug the oven from the power outlet before starting any repair — never work on a live appliance.
• Wear work gloves when handling metal brackets, sheet metal edges, or sharp components.
• Take photos with your phone before disconnecting any wiring harnesses or connectors.
• Work in a well-lit area with enough floor space to lay removed panels flat.

Tools & Parts Needed

Essential Tools

• Phillips #2 screwdriver
• ¼” nut driver
• Multimeter
• Work gloves (heat-rated)
• Flashlight

Replacement Parts

• Oven temperature sensor
• oven thermometer
• multimeter

Step-by-Step Repair Instructions

Step 1

Start by placing an oven thermometer in the center of the oven, run Bake at 350°F for 30 minutes, and record the thermometer reading. This step gives you your true baseline temperature, since the oven’s built-in display can’t reveal its own inaccuracies. Pro tip: avoid opening the door during the test, as heat loss will skew your reading.

Step 2

If the actual temperature is more than 25°F off from the set point, the oven temperature sensor is likely the culprit and should be tested before assuming a calibration issue. Locate the sensor on the back wall of the oven, remove the two Phillips screws, and check its resistance with a multimeter — at room temperature (~70°F), a healthy sensor should read approximately 1,080Ω; if the reading is significantly outside that range, it means the sensor is drifting and sending bad data to the control board. Safety note: ensure the oven is fully powered off and cooled down before handling the sensor.

Step 3

If the sensor tests within spec, the issue is likely related to a calibration offset stored in the control board, which you can correct without any parts. To enter calibration mode, press and hold the Bake button for 5 seconds, then use the +/- arrow keys to dial in an offset equal to your measured error — for instance, if the oven runs 40°F too low, enter +40°F. This offset is saved in non-volatile memory, so it will persist through power cycles.

Step 4

The LG LRG4115ST allows a maximum calibration offset of ±35°F, which covers most normal sensor drift and installation variation. If your measured error exceeds 35°F and replacing the sensor does not bring the error within that window, the control board itself is likely miscalibrating the sensor signal and must be replaced. At that point, further calibration adjustments won’t be sufficient to compensate for faulty board logic.

Step 5

After saving any calibration change, repeat the full thermometer test — run Bake at 350°F for 30 minutes and confirm the actual temperature is within ±10°F of the set point. This verification step is critical; it confirms the offset was saved correctly and ensures no secondary issue is masking the problem. If the result is still outside ±10°F, revisit sensor resistance and recheck all wire harness connections at the sensor and control board.

Where to Buy Replacement Parts

Find genuine OEM and aftermarket replacement parts for your LG LRG4115ST (Gas Range) on Amazon:

• LG LRG4115ST oven temperature sensor EAD64369801 replacement
• LG gas range oven temperature calibration offset
• LG range oven thermometer accuracy test procedure

When to Call a Professional

If the issue persists after completing all the steps above, you might be dealing with a failed main control board, a defective temperature sensor or high-limit thermostat, or wiring that requires specialized diagnostic equipment. In that case, it’s best to contact a licensed appliance technician. On gas models, never attempt work on the gas valve, burner orifices, or supply line — that work is typically restricted to a licensed gas fitter in most jurisdictions.

How Much Does This Repair Cost?

DIY parts for this repair, typically a replacement oven temperature sensor, run $20–$50 for the LG LRG4115ST. A professional service call for the same fix generally costs $150–$300 once you factor in labor and diagnostic fees. Tackling this repair yourself can save you $100–$250 or more.

Frequently Asked Questions

How do I know if my LG LRG4115ST oven temperature is actually off by 50°F?

Place an oven-safe thermometer in the center of the oven and compare its reading to the set temperature after 20 minutes. A consistent 50°F difference confirms that calibration is needed.

Can I recalibrate the oven temperature myself without a technician?

Absolutely! The LG LRG4115ST allows user calibration through the settings menu, adjustable up to 35°F in either direction. Larger offsets may require professional sensor inspection.

What part most commonly causes a 50°F temperature offset on this model?

A faulty oven temperature sensor (RTD sensor) is the most common culprit. Replacing it is a straightforward repair that typically restores accurate temperature readings.

Recommended Products

These are the parts and tools I recommend for this repair, based on compatibility and customer reviews:

• DG32-00002B Oven Temperature Sensor Probe Range Thermistor Compatible with Samsung and LG Oven Parts EBG61305805 DG32-00002A 6322B62214A PS4240743 PS11732697 By Funmit
• Oven Range Temperature Sensor Probe Compatible With LG LRG4111ST, LRG4113ST, LRG4115ST, LRG5115
• 6322B62214A Oven Temperature Sensor Fits for LG GE Heat Probe Oven Sensor Range Oven Temperature Sensor Replacement
• 【2026 Upgraded】 DG32-00002B EBG61305805 Range Oven Temperature Sensor Probe – Exact for Sam.Sung and L.G Oven Parts # EBG61305805 DG32-00002A 6322B62214A PS4240743 PS11732697 by TOMOON

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The RTD Probe That Actually Fixes the 50°F Temperature Offset on the LG LRG4115ST

If your oven is running consistently hot or cold by 50°F, the RTD temperature sensor is the first part I replace on this model—it fails more often than any other component and causes this exact symptom. Grab one of these before you waste time on recalibration attempts that won’t stick.

What works

• The sensor resistance degrades over time on this range, and swapping it out brings temperature accuracy back within 5°F of the dial reading almost every time.
• Installation is straightforward—two screws hold it in place, and the connector pulls straight off with minimal wrestling inside the oven cavity.
• Once installed and the control board resets itself (usually within 30 seconds of power-up), you get immediate feedback—no waiting to run five test bakes to validate the fix.

What doesn’t

• If the problem is actually a control board malfunction (rare on this model), a new sensor won’t help—that’s why I always test resistance first with a multimeter.
• The probe sits in a tight spot under the rear wall, so if you have large hands or limited flexibility, accessing the mounting bracket can feel cramped during removal.

I once had a customer order three different parts before landing on this one—they thought it was a thermostat issue because the oven was heating unevenly, but the real culprit was a failing RTD probe that gave inconsistent readings to the control board. Oven temperature sensor is the part that solves this 90% of the time on the LRG4115ST.

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