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LG dishwasher won't start cycle
Common reasons your LG dishwasher won't start cycle
The most common reasons your LG dishwasher won't start a cycle are a defective electronic control board, damaged power supply board or a failed door switch.
28% of the time it's the Electronic Control Board
23% of the time it's the Power Supply Board
14% of the time it's the Door Switch
35% of the time it's the Something else
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Most common repairs needed to fix a LG dishwasher
Electronic Control Board Replacement
When your dishwasher won’t start a cycle, a defective electronic control board could be causing the problem. The control board will freeze up and fail to start a cycle when its internal memory and logic is corrupted. A failed internal electronic relay or bad electronic part on the circuit board could be causing the control board to freeze up and not start a cycle. Determining whether a control board is defective is difficult. Have a Sears Home Services technician diagnose and repair your dishwasher when it won’t start a cycle.
Power Supply Board Replacement
A damaged power supply board could be causing the problem when your dishwasher won’t start a cycle. The power supply board provides the electrical current needed to operate components such as the fill valve and pumps in the dishwasher. A damaged power supply board won’t provide power to components to operate the dishwasher. When your dishwasher won’t start a cycle, have a Sears Home Services Technician check the power supply board and replace it if it’s damaged.
Door Switch Replacement
When the dishwasher won’t start a cycle, a failed door switch may not be detecting that the dishwasher door is shut. Microswitches in the door switch assembly can break or short out. If the control doesn’t detect that the dishwasher door is closed, the dishwasher will not fill with water and start washing. Because the door switch is hard to access and test, have a Sears Home Services Professional visit your home and repair your dishwasher when you suspect that the door switch failed.
Why is my LG dishwasher not starting the wash cycle?
This video guides you through figuring out why your LG dishwasher won’t start.
When your dishwasher isn't starting, it could be that the dishwasher’s control keys are locked, the dishwasher could be in demo mode or the door switch isn't working as it should.
First, push in firmly on the front of the door near the top to make sure it’s shut tight. The dishwasher won’t start if the door isn’t latched completely.
LG Dishwasher Control Panel Locked
Try pushing buttons on the control panel. If nothing happens, check the light below the lock icon. If it’s lit, the keys are locked. Press and hold the control lock button until the lock light turns off. You can now select and start a cycle. If this doesn’t work for you, check your owner's manual for how to disable the control lock on your LG model.
Checking a LG Dishwasher Door Switch
A faulty door switch will keep the dishwasher from starting. If the door switch is stuck in the "open" position, the dishwasher won't start because it's waiting for you to shut the door—even if you did shut the door.
On this model, the start button and time display start blinking because the control thinks the door is open. Your model may not act that way, it may just sit idle and not start.
Many dishwashers also won’t run if the door switch is stuck in the closed position. The control expects you to open the door after the load is done. If the door switch sticks in the "closed" position, the control won’t detect that you opened the door, so you can’t start the next cycle.
To check for this problem, turn the house circuit breaker for the dishwasher off and then on again, or unplug the dishwasher and plug it back in. This process simulates the door opening so the control starts the cycle. If you can now start the dishwasher now, the door switch is stuck in the closed position. You’ll likely need to replace the door switch to fix this problem.
To confirm a faulty door switch, check the resistance through the door switch with a multimeter. Disconnect electrical power to the dishwasher by shutting off the house circuit breaker or unplugging the dishwasher. Remove the screws from the outer edges of the inner door panel. Support the outer door panel with one hand as you remove the final screws so it doesn't fall.
Separate the outer door panel and the control panel slightly from the inner door panel, and rest the outer panel on the floor while you disconnect the user interface control wire harness. Pull off the outer door panel and control panel.
Release the door latch assembly from the inner door panel and unplug the wire harness from the door switch. Carefully trip the door switch by pushing this lever, keeping your fingers away from the spring and latch. Press the door switch lever to simulate a closed door that's engaging the door switch.
With the multimeter set to check resistance, place a meter probe against each of the door switch prongs. You should measure near 0 ohms of resistance, or continuity, through a working door switch. If you measure infinite resistance, replace the door switch because it's defective.
Other Causes of a LG Dishwasher Not Starting a Cycle
If you measure continuity through the door switch, it’s likely that a defective control board or a wiring failure elsewhere in the dishwasher is keeping the dishwasher from starting.
Have a Sears’ service technician examine and repair this type of failure. The technician can conduct live voltage checks—which should only be performed by someone with proper training—to determine the exact cause of the problem.
What to expect when you experience an LG dishwasher won't start a cycle issue
How is the won't start a cycle problem fixed?
Correcting most won't start a cycle problems usually involves replacing the electronic control board, power supply board or door switch. However, there are many potential causes, so a thorough diagnosis is key to fixing the problem. An accurate diagnosis is essential to understanding how much the repair will be.
Sears Home Services recommendations for a dishwasher that won't start cycle
When the dishwasher won't start a cycle it can be for many reasons. To avoid replacing unneeded parts we recommend having a Sears Home Services professional perform diagnostic tests to identify the root cause of the problem. Our technicians are experienced at diagnosing all types of dishwasher failures.
What to look out for with a dishwasher won't start a cycle diagnosis
Diagnosing modern appliances without proper knowledge and training can be difficult. Without using proper diagnostic techniques, fixing your dishwasher problem will only be achieved through changing parts on a hunch. Appliances, especially in the last 10 years, have become extremely advanced, and many models have electronic parts that are difficult to test. DIY repairs on the latest appliance models are becoming increasingly difficult.
If your LG dishwasher remains idle despite pressing Start, a faulty latch or broken sensor could be halting the command. Piling dishes in the sink isn’t a great fallback. A dishwasher appliance repair near me appointment can resolve this quickly. Restoring a proper start ensures your dishwasher conquers daily messes with ease.
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Thorough
James called to give an estimated arrival time. He was professional and personable. He had 2 professional ideas of the problem and found 1 was correct, but he didn't stop there. He did a thorough check of the appliance. 1 small part was needed. He ordered the part to my house. Fortunately, he was able to schedule for the next week, just before Thanksgiving. As before, he called ahead, arrived and quickly fixed the problem. My appliance is working perfectly.
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Luke was great. Polite and knowledgeable even though the dishwasher was older than he!
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Daniel went above and beyond to fix my dish washer. Very pleasant to deal with.
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Frequently Asked Questions
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