LG Dishwasher not drying dishes: Common Causes & How to Fix

Repair Instructions:

It is possible that the vent is not opening correctly. When LG dishwashers dry the dishes, they often rely on a vent to release the hot and steamy air produced during the rinse cycle. If the vent fails to open properly, moisture can be left on the dishes. Check the vent and make sure it is functioning correctly.

How to Replace LG Dishwasher Vent

1. Locate the vent on the LG dishwasher, usually on the front panel along the bottom.

2. Remove the screws or clamps securing the vent cover and set it aside.

3. Disconnect the vent hose from the port on the vent assembly. You may need pliers.

4. Remove the screws holding the vent assembly in place and detach it from the LG dishwasher.

5. Align the new vent assembly into position and replace the retaining screws.

6. Reconnect the vent hose to the vent port. Make sure it is secured.

7. Replace the vent cover and secure it with the screws or clamps.

8. Check that the vent hose is not kinked or obstructed by the LG dishwasher.

9. Run a test cycle and verify no leaks around the new vent assembly.

10. Confirm the LG dishwasher drains properly, indicating proper vent operation.

Repair Instructions:

The turbidity sensor measures the amount of food particles in the water it uses. This helps the LG dishwasher decide how long each wash or rinse should be. Some sensors also have a thermistor that controls the temperature. If the sensor doesn't work properly, it can stop the LG dishwasher from moving on to the drying phase.

How to Replace LG Dishwasher Turbidity Sensor

1. Turn off power to the LG dishwasher at the breaker box.

2. Open the LG dishwasher door and remove the lower rack.

3. Locate the turbidity sensor inside the LG dishwasher tub on the bottom.

4. Disconnect the sensor electrical connector.

5. Remove the screw or clip securing the sensor to the tub.

6. Pull the sensor out of its slot to remove it.

7. Insert the new turbidity sensor into the slot and secure with the screw or clip.

8. Reconnect the electrical connector to the new sensor. Make sure it clicks into place.

9. Replace the lower rack.

10. Restore power and run a test cycle to verify the new sensor is functioning properly.

11. If any error codes come up, confirm the electrical connector is fully seated and the sensor alignment is correct.

Repair Instructions:

Certain LG dishwashers use a vent fan motor to aid in drying the dishes once the cycle is complete. If the fan motor is not functioning, the LG dishwasher will not be able to dry the dishes effectively. To check if the fan motor has stopped working, you can perform a continuity test on the motor. Manually try rotating the fan blade to make sure it moves without any issues. If the fan motor is burnt out or the fan blade does not spin smoothly, it is necessary to replace the vent fan motor.

How to Replace LG Dishwasher Vent Fan Motor:

1. Prepare the Workspace:

   • Start by turning off the power to the LG dishwasher. Locate the circuit breaker and switch off the corresponding circuit.
   • Make sure the LG dishwasher is empty and remove any dishes or items from inside.

2. Access the Vent Fan Motor:

   • Open the LG dishwasher door and carefully pull out the lower dish rack.
   • Look for the vent fan motor, which is typically located on the inside of the LG dishwasher door, near the top.

3. Remove the Outer Door Panel:

   • Unscrew the screws holding the outer door panel in place. These are usually located along the edges of the door.
   • Carefully detach the outer door panel by pulling it away from the inner door.

4. Disconnect Wiring:

   • Examine the wiring connected to the vent fan motor. It's essential to take note of where each wire is connected before disconnecting them.
   • Using a screwdriver or pliers, disconnect the wires from the motor.

5. Unscrew and Remove the Old Motor:

   • Locate the screws securing the vent fan motor to the inner door of the LG dishwasher.
   • Carefully unscrew and remove the old motor.

6. Replace with the New Motor:

   • Position the new vent fan motor in place and secure it with the screws you removed in the previous step.

7. Reconnect Wiring:

   • Reconnect the wires to the new motor. Use your notes from earlier to ensure the proper connections.

8. Reattach the Outer Door Panel:

   • Carefully reattach the outer door panel to the inner door, making sure it aligns properly.
   • Secure the panel with the screws you removed in step 3.

9. Test the Vent Fan:

   • Turn the power back on by flipping the circuit breaker.
   • Close the LG dishwasher door and run a test cycle to check if the vent fan is functioning correctly.

10. Final Checks:

    • Listen for any unusual sounds or vibrations during the test cycle.
    • Ensure there are no leaks or loose parts.
    • If everything looks and sounds good, you've successfully replaced the LG dishwasher vent fan motor.

11. Clean Up:

    • Put the lower dish rack back in place and return any removed items to the LG dishwasher.
    • Clean up your workspace and dispose of any old parts or packaging.

Repair Instructions:

Some LG dishwashers rely on a heating element to generate heat during the drying phase. If the heating element stops working, the LG dishwasher will not be able to dry the dishes effectively. To check if the heating element has burnt out, you can use a multimeter to test it for continuity. If the heating element does not show continuity, it needs to be replaced.

How to Replace LG Dishwasher Heating Element

1. Disconnect power to LG dishwasher at the circuit breaker. Shut off for safety before servicing.

2. Remove lower access panels and drain water from LG dishwasher tub. Be prepared to collect water.

3. Note wire positions connecting to existing element terminals. Take clear photos for reference.

4. Disconnect wires from element terminals one at a time. Carefully remove without damage.

5. Remove any screws or clips securing element in tub. Lift out once fully disconnected.

6. Clean area within tub where new element will mount. Remove debris from mounting surface.

7. Mount replacement element using fasteners removed earlier. Align mounting holes properly.

8. Reconnect wires individually matching positions noted earlier. Refer to element terminal photos.

9. Replace access panels and securely tighten fasteners. Avoid pinching wires.

10. Reconnect power and run test heat cycle. Check for proper heating operation.

11. Inspect final installation.

Repair Instructions:

Some LG dishwashers rely on a heating element to generate heat during the drying phase. If the heating element stops working, the LG dishwasher will not be able to dry the dishes effectively. To check if the heating element has burnt out, you can use a multimeter to test it for continuity. If the heating element does not show continuity, it needs to be replaced.

How to Replace LG Dishwasher Heating Element Assembly:

1. Safety Precautions:

   • Start by ensuring the LG dishwasher is disconnected from the power source and the water supply to guarantee your safety during the replacement process.

2. Access the Heating Element:

   • Locate the heating element, typically found at the base of the LG dishwasher tub, underneath the lower dish rack.

3. Gather Necessary Tools and Replacement Parts:

   • Ensure you have the required tools, such as a screwdriver and pliers, and acquire a compatible replacement heating element assembly.

4. Remove the Lower Dish Rack:

   • Slide out the lower dish rack to access the heating element area.

5. Disconnect Wiring:

   • Carefully disconnect the wiring attached to the old heating element. Take note of the wiring connections for reconnection.

6. Remove Mounting Hardware:

   • Use a screwdriver or pliers to remove any screws, clamps, or brackets securing the heating element to the LG dishwasher.

7. Detach the Old Heating Element:

   • Gently detach the old heating element from its mounting point, making sure not to damage any surrounding components.

8. Prepare the New Heating Element Assembly:

   • Unpack the replacement heating element assembly and inspect it for any defects. Ensure it is clean and free from any packaging materials.

9. Install the New Heating Element:

   • Carefully position the new heating element assembly in the same location as the old one, securing it with the original mounting hardware.

10. Reconnect Wiring:

    • Reconnect the wiring to the new heating element, ensuring they are properly and securely attached.

11. Reassemble the Lower Dish Rack:

    • Slide the lower dish rack back into the LG dishwasher, ensuring it is properly aligned and securely in place.

12. Plug In and Test:

    • Reconnect the LG dishwasher to the power source and run a test cycle to ensure the new heating element assembly functions correctly, heating the water and aiding in the drying process.

13. Final Check:

    • Inspect the new heating element assembly and its connections to ensure they are properly installed, contributing to effective dishwashing and drying cycles.

Repair Instructions:

There is a wire harness that carries voltage from the LG dishwasher control board to the heating element. If this wire harness becomes loose or damaged, it may not be able to provide power to the heating element. As a result, the LG dishwasher might not be able to dry the dishes properly. You need to examine all wire harnesses for any loose connections or signs of damage, particularly burn marks near the connection points. If you find any issues, you will need to replace the harness.

How to Replace LG Dishwasher Wire Harness

1. Disconnect power at the circuit breaker. Turn off power for safety before servicing.

2. Remove any outer casing or access panels. Find securing screws to access wire routing internally.

3. Note positions of all wire connections. Take photos of harness ends for accurate reconnection.

4. Disconnect wires from control board(s) and other ends one by one. Gently detach each wire connector individually.

5. Remove any securing fasteners or ties holding harness in place. Clips or ties may mount harness along its routing path.

6. Withdraw old wire harness through its routing channel. Carefully extract harness out of its installed position.

7. Clean routing channel where new harness will install. Remove any debris or residue from path.

8. Route replacement wire harness through channel. Feed new harness into position along exact same path.

9. Reconnect wires one by one matching positions. Refer to photos taken earlier for wire locations.

10. Reinstall any fasteners or ties along harness route. Secure in place to prevent movement or damage.

11. Replace access panels removed earlier. Reconnect power and test functions.

Repair Instructions:

The control module is responsible for managing the voltage in the heating element circuit. When the control module malfunctions, it can cause certain components to stop working correctly or not work at all. It's important to note that control modules are often mistaken as the main issue. Before considering a replacement, it is recommended to first check other parts that are more commonly prone to defects.

How to Replace LG Dishwasher Control Module

1. Disconnect power to the LG dishwasher at the circuit breaker. Shut off for safety.

2. Remove the lower front access panel and locate the control module. Usually mounted under LG dishwasher tub.

3. Note wire positions connected to module terminals. Take detailed photos for reconnecting wires.

4. Disconnect all wires from module terminals one at a time without damaging insulation.

5. Remove any mounting screws securing the module to the LG dishwasher frame. Lift module out.

6. Clean area where new module will mount securely. Remove any debris from surface.

7. Mount the replacement module using the screws retained earlier. Align screw holes properly.

8. Reconnect each wire individually matching the positions in your reference photos.

9. Replace the access panel and tighten all screws securely. Avoid pinching wires.

10. Reconnect power and run a test cycle. Check the module operates the LG dishwasher.

11. Inspect and enjoy your refreshed LG dishwasher control module!

Repair Instructions:

The control board is responsible for managing the voltage in the heating element circuit. When the control board malfunctions, it can cause certain components to stop working correctly or not work at all. It's important to note that control boards are often mistaken as the main issue. Before considering a replacement, it is recommended to first check other parts that are more commonly prone to defects.

How to Replace LG Dishwasher Control Board

1. Disconnect power at circuit breaker. Turn off power to LG dishwasher before servicing.

2. Remove lower access panel or kick panel. Find and remove securing screws along bottom.

3. Note positions of all wire connections to board. Take photos to reference during reconnection.

4. Disconnect all wires from old control board. Gently detach each wire one at a time.

5. Remove mounting screws from board enclosure. Usually 2-4 screws secure electronic board assembly.

6. Detach old control board from enclosure base. Carefully lift board out once fully disconnected.

7. Clean mounting area inside enclosure base. Wipe away any debris from new board mounting area.

8. Mount replacement control board into base. Set into position and start securing screws.

9. Reconnect wires one by one, matching positions. Reference photos to precisely reconnect wires.

10. Replace lower access panel removed earlier. Secure with screws.

11. Reconnect power and test functions. Run cycle while checking for proper operations.

Repair Instructions:

The thermostat is responsible for monitoring the temperature inside the LG dishwasher. If the LG dishwasher gets too hot, the thermostat will turn off the heating element to prevent overheating. It's uncommon for the thermostat to be the cause of problems. Before considering a replacement, it's important to check other parts that are more likely to be defective. You can test the high-limit thermostat for continuity with a multimeter.

How to Replace LG Dishwasher Thermostat

1. Turn off power and water supply - Locate the circuit breaker for the LG dishwasher and turn it off. Also turn off the water supply line behind the LG dishwasher.

2. Remove lower panel - The thermostat is usually located behind the lower front panel. Remove any screws or clips to take this panel off.

3. Locate thermostat - It will be connected to the heating element with wires. Note where the wires connect.

4. Disconnect wires - Remove the wires from the old thermostat. You may need to unscrew the thermostat from the LG dishwasher chassis.

5. Install new thermostat - Attach the wires to the same terminals on the new thermostat. Screw it into place if needed.

6. Replace panel and restore power/water - Put the lower panel back on and secure with screws or clips. Turn the circuit breaker and water supply back on.

7. Test operation - Run a test cycle to ensure proper heating and check for leaks.

Repair Instructions:

The main control board is responsible for controlling the voltage in the heating element circuit. When the main control board stops working, it can cause certain components to malfunction or not work at all. It's important to be aware that main control boards are often mistakenly identified as the main problem. Before considering a replacement, it is advisable to first check other parts that are more commonly prone to defects.

How to Replace LG Dishwasher Main Control Board

1. Disconnect power at circuit breaker. Turn off power to LG dishwasher before servicing.

2. Remove lower LG dishwasher panel. Find securing screws along bottom of LG dishwasher cavity.

3. Note wire connections to board. Take photos of positions for reconnection later.

4. Disconnect all wires from board. Gently detach each wire connection point by point.

5. Remove mounting screws from board. Typically 2-3 screws hold board securely in place.

6. Detach old board from mounting posts. Carefully lift out once fully disconnected.

7. Clean mounting area of any debris. Wipe surface where new control board will install.

8. Mount replacement control board. Set into position and start securing screws.

9. Reconnect wires one by one. Reference photos to precisely match wires and connectors.

10. Replace lower access panel removed earlier. Secure with screws.

11. Reconnect power and test functions. Run cycle while checking for proper operations.

Repair Instructions:

The timer controls the voltage in the heating element circuit. When the timer stops working, it can cause certain components to malfunction or not work at all. It's important to be aware that timers are often mistakenly identified as the main problem. Before considering a replacement, it is advisable to first check other parts that are more commonly prone to defects.

How to Replace LG Dishwasher Timer

1. Disconnect power to the LG dishwasher at the circuit breaker. Shut off for safety before servicing.

2. Remove the lower access panel and locate the LG dishwasher timer. It's usually mounted on the interior tub wall.

3. Note wire positions connected to timer terminals. Take clear photos for reference during reconnection.

4. Disconnect all wires from timer terminals one at a time. Carefully detach each connection.

5. Remove mounting screws holding timer body in place. Lift timer straight up once detached.

6. Clean area where new timer will mount. Remove any debris from mounting surface.

7. Mount replacement timer using screws previously removed. Align screw holes properly.

8. Reconnect wires individually matching positions in your reference photos.

9. Replace access panel and securely tighten screws. Avoid pinching wires.

10. Reconnect power and run test cycle. Check that new timer operates LG dishwasher.

11. Inspect final installation.

Repair Instructions:

The float switch is a safety feature on the LG dishwasher that is designed to stop the water from flowing into the LG dishwasher if it gets too full. If the float switch is not working properly or gets stuck, it can disrupt the cleaning cycle and prevent the dishes from drying correctly. To check if the float switch is functioning properly you can test it for continuity with a multimeter. If the float switch is found to be defective, it will need to be replaced.

How to Replace LG Dishwasher Float Switch:

1. Safety First:

   • Before starting any work on your LG dishwasher, make sure to unplug it from the power source or shut off the circuit breaker to prevent electrical accidents.

2. Prepare the Workspace:

   • Empty the LG dishwasher and remove any items from the bottom rack.

3. Locate the Float Switch:

   • The float switch is typically found in the bottom of the LG dishwasher, usually beneath the lower rack. It resembles a small, round or rectangular device.

4. Access the Float Switch:

   • Carefully pull out the lower rack and set it aside to access the float switch easily.

5. Remove the Float Switch:

   • The float switch is often secured by a retaining clip or screws. Remove any fasteners that hold it in place.

6. Disconnect Wiring:

   • The float switch is connected to wiring. Take note of how these wires are connected before you disconnect them.

7. Replace with a New Float Switch:

   • Take your new float switch and attach it to the LG dishwasher in the same position and orientation as the old one.

8. Reconnect Wiring:

   • Reattach the wires to the new float switch. Make sure they are connected exactly as they were on the old switch.

9. Test the Float Switch:

   • Before reassembling the LG dishwasher, plug it back in or turn on the circuit breaker.
   • Fill the LG dishwasher with a small amount of water and observe the float switch's function. It should stop the water from filling when it reaches the correct level.

10. Reassemble the LG Dishwasher:

    • If the float switch works correctly, you can start reassembling the LG dishwasher.
    • Secure the float switch in its mounting position with the retaining clip or screws.

11. Test the LG Dishwasher:

    • Run a short LG dishwasher cycle with no dishes to verify that the float switch controls the water level properly and doesn't trigger any error codes.

12. Final Checks:

    • Listen for any unusual noises or vibrations during the cycle.
    • Make sure there are no leaks around the float switch area.
    • If everything looks and sounds good, you've successfully replaced the LG dishwasher float switch.

Repair Instructions:

The high-limit thermostat is responsible for monitoring the temperature inside the LG dishwasher. If the LG dishwasher gets too hot, the thermostat will turn off the heating element to prevent overheating. It's uncommon for the high-limit thermostat to be the cause of problems. Before considering a replacement, it's important to check other parts that are more likely to be defective. You can test the high-limit thermostat for continuity with a multi meter.

How to Replace LG Dishwasher High Limit Thermostat:

1. Safety First:

   • Prioritize safety by turning off the power to the LG dishwasher at the circuit breaker or unplugging it to avoid electrical accidents.

2. Prepare the Workspace:

   • Empty the LG dishwasher and remove any dishes or items from inside to access the thermostat easily.

3. Locate the High Limit Thermostat:

   • Identify the high limit thermostat, usually located on the LG dishwasher's interior sidewall or base. It appears as a small, round or rectangular component.

4. Remove the LG Dishwasher's Access Panel:

   • Access the back or bottom of the LG dishwasher and remove the access panel, which may require a screwdriver.

5. Disconnect Wiring:

   • Examine the wiring connected to the high limit thermostat and take note of how the wires are connected before you disconnect them.

6. Detach the Old Thermostat:

   • The thermostat may be held in place with a bracket or clips. Carefully remove these fasteners to release the old thermostat.

7. Replace with a New High Limit Thermostat:

   • Position the new high limit thermostat in the same location as the old one, aligning it properly.

8. Reconnect Wiring:

   • Reattach the wires to the new thermostat, ensuring they are connected in the same way they were on the old thermostat.

9. Reattach the Access Panel:

   • Secure the access panel back onto the LG dishwasher, using screws if necessary.

10. Test the LG Dishwasher:

    • Turn the power back on by flipping the circuit breaker or plugging in the LG dishwasher.
    • Run a short test cycle to make sure that the new high limit thermostat functions correctly and doesn't overheat.

11. Final Checks:

    • Listen for any unusual noises or malfunctions during the test cycle.
    • Verify that there are no leaks around the thermostat or in its vicinity.

Repair Instructions:

While using detergent is crucial for a LG dishwasher, using rinse aid can significantly enhance the drying performance. Rinse aid is specially designed to prevent water from sticking to the dishes, particularly plastic ones that tend to be challenging to dry. Many LG dishwashers have dispensers with adjustable settings to regulate the amount of rinse aid used. You will need to check the owner's manual for the recommended settings for use of rinse aid.

Repair Instructions:

It's important to understand that not all LG dishwasher cycles are the same. If you find that your dishes are coming out too wet, make sure to check if the cycle you're using includes a heated dry option or if you have selected the heated dry setting.