LG Dishwasher Won’t Turn On? (here’s why & what to do)

We all take our dishwashers for granted, we load them with dirty dishes, add detergent and rinse aid, select the appropriate wash cycle, press start and walk away. When the cycle has completed we take the now clean and dry dishes and pack them away.

Which is why it’s such a problem when the dishwasher won’t even turn on. If your LG dishwasher won’t turn on, keep reading because in this article we take a close look at all of the possible reasons why it won’t turn on and offer solutions to those problems.

In many cases, all that’s required is a simple fix that won’t involve an expensive repair bill.

Why Won’t The LG Dishwasher Turn On?

There are several things that could be preventing your LG dishwasher from turning on, these include;

Probable CauseSolution
Power supply issuesCheck the power supply
Child lock activatedDeactivate the child lock
Stuck mid cycleReset the dishwasher
Door not fully closedEnsure the door is closed correctly
Defective door latchCheck the latch and replace if necessary
Clogged filterClean the filter
Clogged drain hoseUnclog the drain hose
Defective drain pumpReplace the drain pump if necessary
Faulty keypadCheck and replace keypad if necessary
Blown thermal fuseCheck and replace thermal fuse if necessary
Wiring FaultCheck and replace any damaged wiring
Defective timerCheck and replace timer if necessary
Defective motor relay switchCheck and replace motor relay switch if necessary
Defective motorCheck and replace motor if necessary

Let’s take a closer look at each of these issues;

Power Supply Issues


The first thing to check is whether the dishwasher is plugged into a working socket and that the power is on. Check to see if the socket works by plugging a lamp or something similar in.

Once you’ve confirmed that the socket is working, your home has power, the fuse in the plug is intact and the circuit breaker is in the on position, you will need to inspect the cable for any damage or fraying.

If all of the above are fine, you can move onto the next step.

Child Lock Activated

The child lock on a LG dishwasher is designed to prevent the dishwasher from starting until the child lock has been deactivated. It is a safety feature designed to prevent children from hurting themselves or damaging the dishwasher.

If the child lock has been activated, none of the control buttons including the start button will work. You will need to consult your user manual for specific instructions on how to deactivate the child lock on your LG dishwasher.

This is because the way to deactivate the child lock differs depending on the model LG dishwasher you own. Some have a dedicated child lock button while others need a combination of buttons pressed simultaneously.

Dishwasher Stuck Mid Cycle

There are a few problems that could cause the dishwasher to stick mid cycle. It could anything from a simple electrical glitch to a major component failing.

What typically happens is the dishwasher won’t progress with the cycle and there’s nothing that will clear it. You can try pressing the cancel or reset button on the control panel.

If that doesn’t clear the problem you should perform a hard reset which involves disconnecting the power supply for 10 to 15 minutes. This allows any residue power in the appliance to dissipate.

After the time has passed, reconnect the power supply and try to start the dishwasher again.

Door Not Fully Closed

If the door of the dishwasher isn’t fully closed and latched, the appliance will not start. This is a safety feature designed to prevent the dishwasher from flooding your home.

To solve this, open the door again and check for any dishes or pot handles that could be preventing the door from closing fully. You should also check all around the door seal (gasket) for any food particles, pieces of broken crockery or glass that might be preventing the door from closing.

It could be the door seal itself has become damaged and is preventing the door from closing. In some cases, the hinges could have become twisted out of alignment. Both of these will need checking and replacing if necessary.

Defective Door Latch/Switch

loading a dishwasher

If all of the above appears to be OK, you will need to check the door latch which could have been damaged. It should click into place when the door is closed, if not it could need to be replaced.

If the latch itself seems OK it could be the switch or sensor that is defective. This would prevent the dishwasher from detecting that the door is closed.

The latch electronically locks the door during the cycle to prevent flooding. If the sensor becomes defective, the dishwasher will not sense that the door is shut properly and won’t initiate a cycle.

You will need to check all of the component parts of the door latch assembly which includes the door switch, door latch and strike plate. If any one of these parts is faulty or out of shape they will need repositioning or replacing.

Clogged Filter

All of the food particles and other debris gets trapped in the filter to prevent them from making the clean dishes dirty again. Over time, the filter can become clogged which will prevent the dishwasher from draining properly which could lead to it not turning on.

You will need to remove the filter and clean it under running water. Any stubborn, stuck on bits can be removed using a toothbrush or similar. Unfortunately, if the filter is clogged, there’s a good chance it could lead to further complications like a clogged drain hose or defective drain pump.

Clogged Drain Hose

All of the waste water leaves the dishwasher via the drain hose. If the drain hose is clogged, the dishwasher cannot drain and as the first 45 seconds of any cycle on a LG dishwasher operates the drain function, the appliance will not turn on if the drain hose is clogged.

There are a few ways to unclog the drain hose which include pouring 1 cup of bicarbonate of soda and 1 cup of white vinegar into the tub and leaving it to work for 30 minutes, disconnecting the drain hose and pushing a plumber’s snake through or running the drain hose under running water.

Once the drain hose has been cleared, try to start a wash cycle.

Clogged Or Defective Drain Pump

The drain pump forces all of the waste water through the drain hose and if the drain hose was clogged, there’s a good chance the drain pump could be too.

Food particles or limescale deposits can build up in the drain pump or hose and lead to clogging. Once the drain pump becomes clogged, it has to work harder to move any water which can lead to it becoming defective.

Start by inspecting the impeller for any food or other debris impeding its movement. However, if the drain pump does prove to be defective, it will need to be replaced.

Faulty Keypad

person pressing a button on dishwasher control panel

The keypad on the LG dishwasher is designed to make using the controls and selecting various functions easy. As the dishwasher gets used more and more, the keypad can develop a fault or two.

These faults are almost certainly caused by electrical issues or damage to the components. Any of these faults could cause a disruption in communication between the keypad and the control panel which could prevent the dishwasher from turning on.

In many cases, the keypad will need to be replaced and as it is attached to the control panel, you will need to replace both at the same time.

Blown Thermal Fuse

The thermal fuse is a safety device designed to prevent damage to any of the components on the dishwasher due to excessive heat. It is designed to cut the electrical circuit if the internal temperature of the dishwasher is higher than a certain point.

If the thermal fuse blows it is an indicator that the appliance had overheated for some reason. Once the thermal fuse does blow, the dishwasher will not turn on until it is replaced.

Wiring Fault

Your dishwasher has a myriad of wires and connections, any one of which is liable to become damaged or burnt out at some point. Wear and tear or power surges can be enough to damage the wiring in a dishwasher.

A damaged wire can cause miscommunication between any of the components leading to the dishwasher not turning on. We recommend getting a technician to check and replace any damaged or burnt out wires.

Defective Timer

The timer on a dishwasher regulates the timings for the wash cycle, rinse cycle and drying cycle. If the timer becomes defective, it could lead to the appliance not starting a new cycle, getting stuck mid cycle or not turning on at all.

This is another task best left to an expert as it involves dismantling parts of the dishwasher and checking electrical wiring.

Defective Motor Relay Switch

As soon as you turn on the dishwasher, the motor relay switch comes to life. It channels electricity into the motor. When you press the start button, the motor relay switch sends a message to start the motor and the wash cycle commences.

If the switch becomes defective, it can disrupt the flow of electricity and prevent the dishwasher from starting or even turning on. This is another part that is best left to a technician to check and replace if necessary.

Defective Motor

The motor is the powerhouse of the dishwasher. It powers all of the mechanical functions on the dishwasher including the spray arms and pump. The motor can become worn or damaged due to power surges or the strain of stopping mid cycle due to an error.

If it becomes defective, the motor won’t be able to power the mechanical parts of the dishwasher leading to it stopping prematurely or not starting at all.

The motor will need to be checked to see if it is working correctly. As this involves dismantling the panels of the dishwasher to access the motor, we recommend getting a technician to do this for you.

SEE ALSO: LG Dishwasher Won’t Start But Has Power? Here’s why & what to do

Frequently Asked Questions

Why isn’t my LG dishwasher turning on?

If your LG dishwasher won’t turn on , the first thing to check is the power supply and power cord. If these are all fine it could be caused by, the child lock activated, the door not fully closed, a defective door latch, clogged filter, clogged drain hose, defective drain pump, faulty keypad, blown thermal fuse, a wiring fault, a defective timer, a defective motor relay switch or a defective motor.

How do I reset my LG dishwasher?

To reset your LG dishwasher all you need to do is disconnect it from the power supply for 10 to 15 minutes. This allows any residue power to dissipate. When you reconnect the power, the dishwasher should work properly again.

Do LG dishwashers have a fuse?

LG dishwashers have a thermal fuse which is a safety device designed to prevent the appliance from overheating.

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