Lg Dishwasher Ldf7774St Won’T Start

Title: LG Dishwasher LDF7774ST Won’t Start

Have you ever faced the frustration of a dishwasher that refuses to start? It’s a common predicament that can throw a wrench into your daily routine. One such dishwasher model that has gained popularity is the LG LDF7774ST. However, even this reliable appliance can sometimes encounter issues. In this blog article, we will explore the possible reasons why your LG LDF7774ST dishwasher won’t start and provide you with practical solutions to get it up and running again.

1. Check the Power Connection

Before diving into complex troubleshooting, let’s start with the basics. Ensure that your dishwasher is properly connected to a power source. Check if the power cord is securely plugged into the outlet and there is no damage to the cord. Sometimes, a loose connection or a tripped circuit breaker can be the culprit behind a dishwasher that won’t start.

2. Verify the Control Panel Settings

The control panel of your LG LDF7774ST dishwasher plays a vital role in initiating the wash cycle. Make sure the dishwasher is not in a standby or delay mode. Check if any buttons on the control panel are stuck or unresponsive. A simple reset by turning off the dishwasher and then turning it back on can sometimes resolve the issue.

3. Examine the Door Latch

The door latch is a safety feature that prevents the dishwasher from starting if the door is not securely closed. Inspect the latch mechanism to ensure it is not damaged or obstructed. Clean any debris or food particles that may be preventing the latch from engaging properly. If necessary, replace the latch to ensure a tight seal.

4. Inspect the Float Switch

The float switch is responsible for detecting the water level inside the dishwasher. If the float switch is stuck in the raised position, it can signal the dishwasher that there is an overflow, causing it to not start. Check if the float switch moves freely and is not obstructed by any debris. Gently clean the float switch and its surrounding area to ensure proper functioning.

5. Check the Door Switch

The door switch is another safety feature that prevents the dishwasher from starting when the door is open. If the door switch is faulty or misaligned, it can falsely indicate that the door is open, resulting in a dishwasher that won’t start. Inspect the door switch for any visible damage or misalignment. If necessary, replace the door switch to resolve the issue.

6. Test the Thermal Fuse

The thermal fuse is a safety device that protects the dishwasher from overheating. If the thermal fuse is blown, it can cause the dishwasher to not start. Using a multimeter, check the continuity of the thermal fuse. If it is open, replace the thermal fuse with a new one to restore functionality.

7. Clean the Filters and Spray Arms

Clogged filters and spray arms can obstruct the water flow, leading to a dishwasher that won’t start. Remove the filters and spray arms and clean them thoroughly. Ensure there are no blockages or debris that could impede the water circulation. Regular maintenance of these components can prevent future issues.

8. Check the Water Inlet Valve

The water inlet valve controls the water supply to the dishwasher. If the valve is defective or clogged, it can prevent the dishwasher from starting. Inspect the water inlet valve for any visible signs of damage or blockage. If necessary, replace the valve to restore proper water flow.

9. Inspect the Motor and Pump Assembly

A malfunctioning motor or pump assembly can hinder the dishwasher’s ability to start. Listen for any unusual noises coming from the dishwasher during the start-up process. If you suspect an issue with the motor or pump, it is advisable to seek professional assistance for repair or replacement.

10. Reset the Control Board

Sometimes, a glitch in the control board can cause the dishwasher to not start. Resetting the control board can often resolve this issue. Locate the dishwasher’s circuit breaker in your electrical panel and turn it off for a few minutes. Then, turn it back on to reset the control board.


A non-starting LG LDF7774ST dishwasher can be a frustrating experience, but with the right troubleshooting steps, you can get it back to its efficient cleaning performance. Remember to check the power connection, control panel settings, door latch, float switch, door switch, thermal fuse, filters, spray arms, water inlet valve, motor, and pump assembly. By following these steps, you’ll be able to identify and resolve the issue, ensuring your dishwasher is up and running again in no time.