Why Is My LG Dishwasher Beeping During Cycle?

There are several different reasons why your LG dishwasher may beep during the cycle. Some of these reasons are completely normal functions of the LG dishwasher while others may indicate a more serious issue.

No matter what the cause of your LG dishwasher beeping, the list of common causes below will help you determine the cause of your issue so that you can address it appropriately. So let us begin by talking about a few of the most common causes of an LG dishwasher beeping during an active cycle.

1. The Cycle If Finished

Your LG dishwasher will be at the end of an active cycle once the cycle has been completed. This is a completely normal function of your LG dishwasher and does not indicate any sort of serious issue.

This is simply an indicator that the cycle has been completed and you can begin to unload your dishwasher whenever you are ready.

2. You Opened The Door During The Cycle

Your LG dishwasher will also beep during the cycle if you open the door before the cycle is complete. This is another built-in indicator to allow the user to know that the door is currently open and the cycle is being paused until it is closed again.

Simply closing the door after you are done will restart the cycle over again and allow you to continue using your dishwasher as normal.

3. No Detergent Detected

Your LG dishwasher will beep during an active cycle if there is no detergent currently detected inside of the dishwasher.

This is another built-in indicator that merely serves to let the user know that there is no detergent detected inside the dishwasher. You will need to resolve the detergent issue before the beeping will stop and the cycle will continue.

Fix – Add Detergent

Simply adding more detergent to your LG dishwasher will allow the cycle to continue without issue. If you are out of detergent completely, it is best to simply pause the dishwashing cycle until you can get some more and add it to your dishwasher. Once the dishwasher detects the detergent, it will continue with the cycle as normal.

4. Broken Reed Sensor

Your reed sensors are the things that protect the dishwasher’s spray arms. The dishwasher’s arms spray hot water and stream under a high pressure to all of the dishes.

If a dish is improperly positioned in the dishwasher, this can block the rotation of the spray arm. If the reed sensor is broken, you’ll need to get it replaced or checked out by a professional.

Fix – Replace Or Repair Reed Sensor

You will need to repair or replace your reed sensor if it is damaged or not working properly. If you know how to do this yourself, you can attempt it. Most people will opt to contact a professional to come and service their dishwasher instead to resolve this issue.

5. Your Cycle Selector Is Currently Stuck

The cycle selector on your LG dishwasher is what you use to choose the cycle that you want to start on. The dishwasher uses what the cycle selector is on to start the cycle.

If the dishwasher hasn’t processed the cycle selector option you’ve chosen, then your dishwasher won’t be able to start and it’ll start beeping.

You can try to choose a different cycle and hope that the dishwasher starts which will stop the beeping sound. Sometimes dishwashers don’t process the options chosen and they can remain stuck which can cause the beeping noise to start. Choosing a different cycle might trigger it to start.

Fix – Choose A Different Cycle

You can attempt to resolve this problem by choosing a different cycle. This will likely unstick the cycle selector and allow the dishwasher to continue the cycle as normal. If this does not resolve your issue, you may need to contact a professional to come and service your machine.

6. The Timer Is Broken

There’s a timer in your dishwasher that controls the cycle by controlling the amount of time power that’s sent to each of the dishwasher components.

If the timer is broken, then it can trigger the beeping noise to start because the cycle won’t start.

It’s uncommon to find that your dishwasher’s timer is no longer working and it’s also hard to diagnose that they’re malfunctioning but the beeping noise might be your first clue.

If the timer doesn’t work properly, then some of your dishwasher’s components won’t get enough power, therefore it may not start. To test this, you need to use a multimeter to test the resistance.

Fix – Repair Or Replace Timer

You will need to repair or replace your timer if it is not working properly. If you know how to do this yourself, you can attempt it. It will likely be a better option to call a professional to have them come take a look at your LG dishwasher timer.

7. The Dishwater Motor Is Damaged

Sometimes your dishwasher can start, fill up with water, then once the cycle is meant to start, it doesn’t start and you hear the beeping noise. If this is what you’ve experienced, chances are that the motor is broken.

If you’re familiar with dishwashers, you can try and access the motor. You’ll need to look underneath the pump cover and filter assembly to check if it’s clogged. If it is, this could be causing the beeping noise.

Fix – Replace The Motor

You will need to repair or replace your motor if it is not working properly. If you know how to do this yourself, you can attempt it. It will likely be a better option to call a professional to have them come take a look at your LG dishwasher motor.

In some extreme cases, it may be more practical to simply replace the whole LG dishwasher if a motor repair is close in price.

8. The Dishwasher Is Not Draining Properly

If you’re hearing the beeping sound and you notice that your LG dishwasher isn’t draining, then there might be a problem with the dishwasher drainage systems.

To check this before calling in a professional, you can remove and clean the filters. If they’re damaged, then you can replace them. You should find them at the bottom of the dishwasher to remove them, you can twist and pull them.

Another thing to check is if your dishwasher isn’t draining if it’s connected to the waste hose.

If the waste hose is obstructed or it’s being pinched, then water won’t be able to drain properly, and this can cause a beeping sound. If there’s a blockage in your sink, then this can stop your LG dishwasher from being drained.

If the dishwasher’s water pipe is connected to the sink, then you’ll need to get a professional to check it out.

If there are large pieces of food that go through the waste pipe, they’ll need to be removed. Another thing that can get in here is grease. Whilst the grease is hot, it gets into the waste pipe, then once it hardens, it can get stuck in here for good.

If your LG drain pump is blocked, this can stop the dishwasher from draining. Over time, food can get stuck in the drain pump.

You can get a wet-dry vacuum tool to get rid of this or you can scoop it out with your hands. If you don’t know how to access the drain pump, then you’ll need to get a professional to check it out.

Fix – Contact A Professional To Clear Out The Drain Pump

You will need to contact a professional to clear your drain pump if you do not know how to access it yourself. Once the drain pump has been cleared, your LG dishwasher will begin to drain like normal and stop beeping during the cycle.