How to Fix ProBake error on LG LWS3063ST (Wall Oven)

{“@context”:”https://schema.org”,”@type”:”HowTo”,”name”:”How to Fix ProBake error on LG LWS3063ST (Wall Oven)”,”description”:”Step-by-step guide to fix ProBake error on LG LWS3063ST (Wall Oven). DIY appliance repair with parts list and tools.”,”url”:”https://fixappliancefast.com/how-to-fix-probake-error-on-lg-lws3063st-wall-oven/”,”totalTime”:”PT12H”,”tool”:[{“@type”:”HowToTool”,”name”:”Phillips #2 screwdriver”},{“@type”:”HowToTool”,”name”:”¼” nut driver”},{“@type”:”HowToTool”,”name”:”Multimeter”},{“@type”:”HowToTool”,”name”:”Work gloves (heat-rated)”},{“@type”:”HowToTool”,”name”:”Flashlight”}],”supply”:[{“@type”:”HowToSupply”,”name”:”Bottom bake element”},{“@type”:”HowToSupply”,”name”:”convection fan motor”},{“@type”:”HowToSupply”,”name”:”temperature sensor”},{“@type”:”HowToSupply”,”name”:”multimeter”}],”step”:[{“@type”:”HowToStep”,”name”:”Step 1″,”text”:”Disconnect power at breaker; LG ProBake moves heating element to bottom and uses convection fan for even baking — if ProBake fails, test bottom element and fan.”,”position”:1},{“@type”:”HowToStep”,”name”:”Step 2″,”text”:”Test bottom element (access via oven floor panel — remove 2 Phillips screws; test element Rx1): open = replace.”,”position”:2},{“@type”:”HowToStep”,”name”:”Step 3″,”text”:”Test convection fan motor (oven back panel — 4 Phillips inside oven): spin blade by hand; replace if seized; test winding Rx1.”,”position”:3},{“@type”:”HowToStep”,”name”:”Step 4″,”text”:”Test temperature sensor (oven back wall, 2 Phillips + harness): at 70°F ~1,080Ω; replace if out of spec.”,”position”:4},{“@type”:”HowToStep”,”name”:”Step 5″,”text”:”Run ProBake at 350°F with oven thermometer; temperature should be even across all rack positions.”,”position”:5}]}

ProBake error

In this guide, I’ll walk you through the steps to fix the ProBake error on your LG LWS3063ST (Wall Oven). With the right tools and parts, most homeowners can complete this repair in about 1–2 hours, potentially saving you from an expensive 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

If your LG LWS3063ST is displaying a ProBake error, you might notice one or more of the following symptoms:

• The oven display shows a “F3” or “F9” error code during or after a ProBake cycle
• The bottom heating element fails to activate when ProBake mode is selected
• Oven temperature fluctuates significantly or never reaches the set temperature
• The oven shuts off unexpectedly mid-cycle while ProBake is enabled

These issues usually stem from a faulty bottom bake element, a defective temperature sensor, or a worn control board that can no longer manage the ProBake heating cycle effectively.

Safety First

• Shut off power at the breaker, not at the appliance — a hardwired wall oven has no cord to pull. Lock or tag the panel, then verify the oven is dead with a contact voltage tester before removing any panel.
• 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

• Bottom bake element
• convection fan motor
• temperature sensor
• multimeter

Step-by-Step Repair Instructions

Step 1

First things first, disconnect power at the breaker. The LG ProBake system utilizes the heating element on the oven floor along with a convection fan for even baking. If ProBake fails, the bottom element or the fan motor are usually the culprits. Keeping the power off throughout the process protects you from shock and prevents the control board from logging false fault codes during testing.

Step 2

Next, remove the oven floor panel by unscrewing the 2 Phillips screws. Disconnect the bottom element’s wire harness and set your multimeter to Rx1 to check continuity across the element terminals. If you get an open reading (no continuity), it indicates the element has burned through and needs replacement. A broken element is the most common reason for ProBake failure, often visible as a crack or blister on its surface.

Step 3

Remove the oven’s back interior panel (secured by 4 Phillips screws accessible from inside the oven cavity) to access the convection fan motor. Spin the fan blade by hand to check for binding or seizure, which indicates a failed bearing. If the blade spins freely, test the motor windings on Rx1. No continuity confirms a burnt winding, meaning the motor needs replacement; but if the blade is seized, it should be replaced regardless.

Step 4

Now, locate the temperature sensor on the back wall of the oven. Remove its 2 Phillips screws and disconnect the harness to pull it out for testing. At room temperature (about 70°F), a good sensor should read approximately 1,080 ohms on Rx1. If your reading is significantly out of that range, the sensor is likely sending incorrect data to the control board, causing ProBake to heat improperly or shut down, and it should be replaced.

Step 5

Reassemble all panels, restore power, and run a ProBake cycle set to 350°F. Use a calibrated oven thermometer placed at multiple rack positions to confirm even heat distribution. The temperature should stay close to 350°F consistently across all positions. If you still experience hot or cold spots after replacing the faulty component, check that the convection fan blade is properly seated on the motor shaft and spins freely, as even a slight imbalance can disrupt airflow.

Where to Buy Replacement Parts

You can find genuine OEM and aftermarket replacement parts for your LG LWS3063ST (Wall Oven) on Amazon:

• LG LWS3063ST ProBake bottom element EHD48003603 replacement
• LG wall oven convection fan motor EAU62611103 replacement
• LG ProBake error code F diagnosis

When to Call a Professional

If the problem persists after following all these steps, you might be facing a failed main control board, a defective temperature sensor, high-limit thermostat, or wiring issues that need specialized diagnostic equipment. In that case, it’s best to contact a licensed appliance technician. And remember, on gas models, do not attempt repairs on the gas valve, burner orifices, or supply line — always leave that work to a licensed gas fitter in your area.

How Much Does This Repair Cost?

For DIY parts, fixing a ProBake error on the LG LWS3063ST typically costs between $20–$150, depending on whether you need a temperature sensor, control board, or heating element. A professional service call usually runs between $150–$300 when you factor in labor and diagnostic fees. Tackling this repair yourself can save you $100 or more.

Frequently Asked Questions

What does the ProBake error mean on my LG LWS3063ST?

The ProBake error indicates there’s an issue with the oven’s bottom heating element or its associated control circuit. This typically means the element isn’t reaching or maintaining the correct temperature during the ProBake convection cycle.

Can I still use my wall oven while troubleshooting the ProBake error?

It’s best to avoid using the oven until the issue is resolved since a faulty heating element can lead to uneven cooking or safety risks.

Do I need a technician to fix the ProBake error, or is it a DIY repair?

Replacing the heating element on the LG LWS3063ST is a manageable DIY repair for confident homeowners. However, if the control board is at fault, I recommend seeking professional service.

Recommended Products

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

• Range Oven Sensor Thermistor For LG LDE4415ST- for ASTLLGA LWS3063ST/02 LWS3063BD/02 LTEL7337D
• 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 LWS3063ST,LWS3081ST, RF1032BB,RF1032BS
• EBR74798602 for LG Washer Control Board

As an Amazon Associate, I earn from qualifying purchases.

The Lower Bake Element That Usually Fixes the ProBake Error on This Model

When the ProBake error hits on the LWS3063ST, the lower bake element is your first suspect—it’s the component most commonly responsible for throwing off the oven’s temperature calibration and triggering that error code. If you’re getting inconsistent heat or the oven won’t hold temperature during convection bake, this is the part that usually needs to come out.

What works

• Direct fit for the LWS3063ST—no adapter or modification needed; it bolts in exactly where the old one came out.
• Clears the error code immediately once installed and the oven runs through a calibration cycle, which usually takes one full preheat.
• Restores even heat distribution across the bottom of the oven cavity, which is what ProBake convection relies on to work properly.

What doesn’t

• Won’t fix the error if the temperature sensor is the real culprit—you’ll still get the code and need to swap that next, which means opening the oven back up.
• Requires disconnecting power and waiting 30 seconds before reinstalling; if you rush the job without letting residual power drain, the control board can throw a different fault code temporarily.

The one thing I’ve learned on this model is that nine times out of ten, people order the sensor first and end up replacing the element anyway—the symptom looks like a temperature issue, but it’s really the heating element losing continuity under load. Save yourself the second trip and start here. Bottom bake element

This post contains affiliate links. As an Amazon Associate, I earn from qualifying purchases at no extra cost to you.