LG Oven not heating: Causes + Fixes (2024)

Repair Instructions:

The igniter is usually the problem when an oven isn't heating. It has two main roles. First, it pulls electrical current through the oven's safety valve to open it. Second, it heats up to glow and light the gas in the oven burner. If the igniter becomes weak, it won't be able to open the safety valve properly. If the valve doesn't open, the oven won't heat up. To check if the igniter is faulty, watch it when the oven is on. If the igniter glows for over 90 seconds without lighting the gas flame, it's probably too weak to open the valve and needs to be replaced. If the igniter doesn't glow at all, use a multimeter to test for electrical continuity. If the igniter lacks continuity, you'll need to replace it.

How to Replace Range/Stove/Oven Igniter

1. Shut off power.Locate the circuit breaker for the range and shut it off to cut power to the appliance.

2. Remove oven door.Most ranges have hinges that allow the door to be lifted off. Support the door and disengage it from the hinges. Set it aside.
3. Remove back panel.Look inside the oven cavity for screws or clips holding a rear access panel in place. Remove the screws or clips and take off the panel to access wiring and components.
4. Disconnect wires.The igniter will have two wires, one power supply and one ground, connected to it. Carefully disconnect the wires by twisting or squeezing release tabs to pull them free.
5. Remove old igniter.The igniter is normally held in place with one or two mounting screws. Remove the screws to take out the old igniter.
6. Install new igniter.Line up the mounting holes of the replacement igniter and secure it with the original screws. Reconnect the wires by pushing them firmly into the terminals.
7. Replace back panel and door.Reattach any panels or covers removed during disassembly and remount the oven door on its hinges.
8. Restore power.Go to the circuit breaker and restore power to the range. Test that the igniter sparks and the range functions properly.

View LG Range/Stove/Oven Igniter parts

Repair Instructions:

When the bake element works as it should, it turns red hot. If it doesn't turn red, it means the element isn't heating up. Often, you can see physical damage if the heating element has burned out. Look for holes or blisters on the heating element. To check if the bake element has burned out, use a multimeter, which is a tool that tests whether electricity can move through a component. If the bake element doesn't have continuity, meaning electricity can't flow through it, it needs to be replaced.

How to Replace Range/Stove/Oven Bake Element

1. Disconnect power supply- Locate the circuit breaker for the oven and switch it off before starting work. This prevents electric shock.

2. Remove oven racks- Take out all racks and accessories to clear the way to the bake element.

3. Locate mounting screws- The bake element is held in place by mounting screws accessible from the rear. Remove these screws.

4. Disconnect wires- Detach the electrical connectors from the terminals on the ends of the bake element. Make note of wire positions.

5. Extract old element- Gently slide out the old bake element, being careful not to damage the ceramic insulation.

6. Install new element- Carefully insert the replacement bake element into the oven cavity along the same path as the old one.

7. Reconnect wires- Attach element connector wires according to notes from disassembly to match original configuration.

8. Remount element- Insert mounting screws to securely fasten the new bake element into place.

9. Replace oven racks- Return all racks and accessories to their original positions within the oven.

10. Restore power & test- Turn circuit breaker back on. Turn on oven to verify proper heating operation.

View LG Range/Stove/Oven Bake Element parts

Repair Instructions:

An oven's control board will often be used to send voltage to the bake and broil elements or the igniters. If the control board is defective, the voltage may not be sent to these components and the oven will not heat. You can inspect the board for signs of damage or a shorted component. You can also use a multimeter to test for voltage reaching the bake or broil elements or igniters after reviewing the appliance's wiring diagram.

How to Replace Range/Stove/Oven Oven Control Board

1. Shut off power to the rangeby locating the circuit breaker and shutting it off. This prevents electric shock.

2. Remove the control knobsby gently pulling straight up and off of the stems they attach to. Set aside.

3. Remove the control panelof the oven by locating mounting screws around the edges and carefully removing them.

4. Disconnect the wire connectorsattached to the control board by squeezing release tabs and gently pulling wires free.

5. Remove mounting screwsor other hardware securing the board in place. Lift out the old board.

6. Install the new control boardand attach with original mounting screws or hardware.

7. Reconnect wire connectorsto matching terminals, ensuring colors or locations match up properly.

8. Replace the control paneland mounting screws around the edges.

9. Reattach control knobsby pushing them back onto the stems.

10. Restore power and testovent functions like bake, broil, temperature controls.

View LG Range/Stove/Oven Control Board parts

Repair Instructions:

The temperature sensor in an oven keeps track of the temperature inside the oven to make sure it's accurate. If the temperature sensor isn't working right, the oven might not heat up at all. You can test the sensor with a multimeter, a tool that measures electrical properties like resistance, called ohms, at a specific temperature. This can help you figure out if the sensor is faulty.

How to Replace Range/Stove/Oven Temperature Sensor

1. Shut off power to the rangeby flipping the circuit breaker or unplugging the appliance. This ensures safety during repair work.

2. Remove the oven control knobsby gently pulling them straight up off of their stems. Set aside.

3. Remove the oven control panelby locating the mounting screws around the perimeter and carefully removing them.

4. Disconnect the wiresattached to the temperature sensor by squeezing locking tabs and pulling wires free. Note positions or take photos for reference.

5. Remove any mounting screwsor hardware securing the sensor in place inside the oven cavity.

6. Carefully withdraw the old sensor.Avoid damaging its wire leads or silicon insulation.

7. Insert the new temperature sensorin the same location, feeding wires through access route.

8. Reattach wiresby securely pushing leads into their original connector positions on the sensor.

9. Replace control paneland securing screws around its edges.

10. Test the oven's functionslike baking and temperature readout to ensure proper operation.

View LG Range/Stove/Oven Temperature Sensor parts

Repair Instructions:

An oven burner spark electrode is used to light up the gas for the bake and broil burners. This electrode, a device located next to the burner, works like a spark plug. When electricity is supplied, a spark jumps from the tip of the electrode to its shield, lighting the gas. If the electrode is damaged or worn out, the spark might not happen. Look at the electrode assembly closely for cracks in the porcelain housing or damage to the electrode tip. Keep in mind, the range needs a proper ground and the correct incoming voltage for the electrode control to detect a flame once the burner is lit. If the burner turns off after being lit, ensure there's a proper ground and the correct polarity at the wall outlet.

How to Replace Range/Stove/Oven Bake or Broil Spark Electrode

1. Disconnect power to the rangeat the main circuit breaker.

2. Locate the oven spark electrodenear the top/back of the oven cavity.

3. Twist the wire connectorto unfasten it from the electrode terminal.

4. Remove mounting screwsecuring electrode to the back oven panel.

5. Gently wiggle electrode straight up and outof the mounting hole.

6. Insert replacement electrodethrough mounting hole in back panel.

7. Secure with mounting screwand tightened fully by hand.

8. Reconnect wire connectorby firmly pushing onto electrode terminal.

9. Replace any removed panels or insulationfor safe operation.

10. Restore power and test oven ignitor functionsbefore using.

View LG Range/Stove/Oven Bake or Broil Spark Electrode parts

Repair Instructions:

Examine the broil element for any holes or blisters. When it's working correctly, the broil element turns red hot. If it doesn't become red, it means the element isn't heating up. If the broil element has burned out, you'll often be able to see the damage. To check if the broil element has burned out, you can use a multimeter, a tool that tests whether electricity can flow through a component. If the broil element doesn't have continuity, meaning electricity can't pass through it, you'll need to replace it.

How to Replace Range/Stove/Oven Broil Element

1. Disconnect power supplyto the range at the main circuit breaker for safety.

2. Remove broiler/top oven panelsby lifting out mounting clips or screws.

3. Carefully pull broil element shelfout to fully access element wires.

4. Detach wire leadsfrom element by loosening screwdriver terminal screws.

5. Slide old broil element outof mounting slots at rear of broiler box.

6. Insert replacement element leadsfirst through access hole before sliding into slots.

7. Tighten terminal screwsto securely connect wires to new element.

8. Slide shelf back into positionbelow element and replace panels.

9. Reconnect power supplyat main breaker and test broiler function.

10. Replace any insulation blanketsor heat shields removed during replacement.

View LG Range/Stove/Oven Broil Element parts

Repair Instructions:

For gas ovens that use a spark igniter, a malfunctioning spark module could be the reason the oven isn't heating up. If you don't see a spark close to the bake or broiler burner tube when the oven is on, use a multimeter. This tool can help you figure out if electricity is reaching the spark module. If the module is getting power but the oven isn't heating, the spark module is probably broken and needs to be replaced.

How to Replace Range/Stove/Oven Spark Module

1. Shut off power to the rangeat the circuit breaker. This prevents electric shock during repair work.

2. Locate the spark moduleunder the control panel area, often secured by screws.

3. Disconnect any wiringconnected to the module by squeezing locking tabs and pulling wires free.

4. Remove mounting screwsor hardware securing the module in place.

5. Detach the old spark moduleby lifting it away from the mounting location.

6. Position the new spark moduleinto the same space, aligning any mounting holes.

7. Reattach any wiresby firmly pushing them onto matching terminals of the new module.

8. Secure the moduleusing original screws or fasteners.

9. Restore power to the range.

10. Light the applianceand ensure the ignition spark is present at each burner as needed.

View LG Range/Stove/Oven Spark Module parts

Repair Instructions:

If the oven gets overly hot, the thermal fuse acts like a safety switch and cuts off power to the oven. If this fuse has blown, the oven won't heat up. But this doesn't happen often. To check if the thermal fuse is the problem, you can use a multimeter to test if electricity can flow through it, a property called continuity. If the thermal fuse doesn't have continuity, it needs to be replaced. Remember, a blown thermal fuse can't be reset—it must be replaced if it's blown.

How to Replace Range/Stove/Oven Thermal Fuse

1. Disconnect power to oven.Turn off the power to the range at the main circuit breaker.

2. Remove control knobs.Detach any temperature or function control knobs.

3. Remove control panel.Unfasten retaining screws to lift off the main oven control console.

4. Locate thermal fuse.Identify the thermal fuse mounted on the oven's temperature control housing unit.

5. Detach wiring leads.Carefully unplug the electrical connections from the old thermal fuse.

6. Remove mounting hardware.Use a screwdriver to detach any screws or clips retaining the fuse.

7. Extract old fuse.Withdraw the entire burnt-out thermal fuse from its mounting position.

8. Install new fuse.Set the replacement fuse into the vacant space on the control housing.

9. Attach mounting hardware.Secure the new fuse tightly with the original screws or clips.

10. Reconnect wiring.Plug the electrical leads back onto the terminals of the new thermal fuse.

11. Replace control console.Fasten control panel back into position with retaining screws.

View LG Range/Stove/Oven Thermal Fuse parts

Repair Instructions:

The oven control board uses relays to send electricity to the bake and broil circuits based on the user's settings and feedback from sensors. If the control board is faulty, it might not send electricity to the heating parts. But, this doesn't happen often. Before you replace the control board, first check all the heating parts. If you find that all the heating parts are working correctly, then the control board should be replaced. Testing the control board isn't simple, so if you think it might be faulty, it's best to just replace it.

How to Replace Range/Stove/Oven Oven Control Board

1. Shut off power to the rangeby locating the circuit breaker and shutting it off. This prevents electric shock.

2. Remove the control knobsby gently pulling straight up and off of the stems they attach to. Set aside.

3. Remove the control panelof the oven by locating mounting screws around the edges and carefully removing them.

4. Disconnect the wire connectorsattached to the control board by squeezing release tabs and gently pulling wires free.

5. Remove mounting screwsor other hardware securing the board in place. Lift out the old board.

6. Install the new control boardand attach with original mounting screws or hardware.

7. Reconnect wire connectorsto matching terminals, ensuring colors or locations match up properly.

8. Replace the control paneland mounting screws around the edges.

9. Reattach control knobsby pushing them back onto the stems.

10. Restore power and testovent functions like bake, broil, temperature controls.

View LG Range/Stove/Oven Oven Control Board parts

Repair Instructions:

The gas oven safety valve cooperates with the oven igniter to supply gas to the burner. If the safety valve breaks, the oven won't heat up. But this seldom happens. Before deciding to replace the safety valve, first check all the oven parts that usually break, especially the igniter. If all the other heating parts are working fine, use a multimeter to test if electricity can flow through the safety valve, a property known as continuity. If the safety valve doesn't have continuity, you should replace it.

How to Replace Range/Stove/Oven Safety Valve

1. Shut off gas supplyat the main shut-off valve behind or under the appliance.

2. Disconnect flex gas linefrom safety valve by loosening coupling nut with a wrench.

3. Remove mounting screwsor nuts securing safety valve to appliance structure.

4. Gently remove old valvetaking care not to scratch nearby surfaces.

5. Apply pipe thread sealantto inlet port of replacement safety valve.

6. Position replacement valveat installation point and start mounting hardware.

7. Reconnect flex gas lineand tighten coupling nut securely.

8. Fully tighten mounting screws/nutswith a wrench.

9. Turn on gas supplyand check connections are leak-free with soapy water.

10. Reinstall any removed componentsand verify safe operation before use.

View LG Range/Stove/Oven Safety Valve parts

Repair Instructions:

The oven thermostat controls the broiler's temperature. If there's a problem with the oven broiler, the thermostat might be broken. This thermostat has a thin copper tube attached to a slightly thicker one that goes into the oven. Inside this tube is a special hydraulic fluid. When the broiler gets hotter, the fluid expands, pushing on a small device in the thermostat and turning the heat off. As the broiler cools down, the pressure lessens and the device lets the broiler heat up again. Testing the oven thermostat is tough, and it can't be fixed if it's broken. If the thermostat is causing the problem, it needs to be replaced.

How to Replace Range/Stove/Oven Temperature Control Thermostat

1. Disconnect power supply- Locate the circuit breaker for the oven and switch it off before starting work. This prevents electric shock.

2. Remove control knobs- The knobs on the stovetop need to be removed to access the thermostat. Gently pull them straight off the stems.

3. Take off backguard- Unscrew any screws or brackets on the backguard and remove it to access the rear of the thermostat.

4. Disconnect wiring- Identify each thermostat wire connection and remove them. Tape wires to keep organized for reassembly.

5. Unmount old thermostat- Remove mounting screws to detach the old thermostat from the oven. Be careful not to lose any parts.

6. Install new thermostat- Secure the new thermostat in place with mounting screws. Make connections to match old wiring.

7. Replace backguard- Carefully reattach the backguard with the screws and brackets. Make sure wires are secure.

8. Reattach knobs- Line up the knobs and gently push back onto the control stems until fully seated.

9. Restore power- Return to the circuit breaker and switch the oven power back on.

10. Test operation- Set oven to various temperatures and verify accurate readings. Calibrate if needed per manufacturer instructions.

View LG Range/Stove/Oven Temperature Control Thermostat parts

Repair Instructions:

Some ovens have a part called a relay board. This board has multiple relays, which manage the electric current going to the heating element. If one or more of the relays on the board fail, the oven won't heat up. If the relay board is faulty, it needs to be replaced.

How to Replace Range/Stove/Oven Relay Board

1. Disconnect power to the ovenat the main circuit breaker for safety.

2. Remove oven control knobs, bezels and back panelsto access relay board.

3. Identify wire harness connectorsattached to the original relay board.

4. Disconnect wire harness connectorsby depressing locking tabs and pulling apart.

5. Remove mounting screwsor clips securing relay board in the oven cavity.

6. Carefully lift out old relay board assembly. Check for fit issues with replacement.

7. Position new relay board assemblyand start any mounting screws or clips.

8. Reconnect all wire harness connectorsfirmly until locked in place.

9. Fully secure relay board mountingand replace removed panels/knobs.

10. Restore power and test all oven functionsbefore use.

View LG Range/Stove/Oven Relay Board parts

Repair Instructions:

The valve and pressure regulator could be causing the problem, but this is extremely rare. The valve and pressure regulator are often wrongly blamed for issues. Before you replace these parts, it's a good idea to first check all the parts that usually break down more frequently.

How to Replace Range/Stove/Oven Valve and Pressure Regulator

1. Shut off gas supplyat the main line behind or under the appliance.

2. Disconnect flex gas linesfrom both valve and regulator by loosening coupling nuts.

3. Remove valve and regulator mounting fastenerssuch as screws or nuts.

4. Gently remove old valve and regulatortaking care not to scratch surrounding surfaces.

5. Apply pipe thread sealantto inlet ports of replacement parts before installing.

6. Mount regulator firstin original position using fasteners by hand only.

7. Attach flex gas linesto valve and regulator hand-tightening fittings.

8. Secure valve baseand fully tighten all fasteners at both components.

9. Turn on gas and inspectconnections for leaks using soapy water solution.

10. Replace any panels or coversremoved and verify safe operation.

View LG Range/Stove/Oven Valve and Pressure Regulator parts

Repair Instructions:

Electric ovens need 240 volts of alternating current to work, while gas ovens need 120 volts. If an oven doesn't turn on, there might be a problem with the power coming in. To find out if the electrical outlet is giving enough voltage, you can use a multimeter. This tool can test the power coming in at the wall socket.

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Repair Instructions:

One of the wires that provides electricity to the oven element or igniter could be burned out. This usually happens close to the heat source. To see if a wire is burned out, take a look at the wires that connect to the element or igniter. If a wire is burned out, it will often look visibly charred or burnt.

View LG Loose or Burnt Wire Connection parts