Why Won’t My Dishwasher Turn On?

Discovering your dishwasher is broken isn’t a good way to start your day, especially if you have to deal with the expense of calling out an engineer plus taking time off work to let them in just to pinpoint the issue.

The good news is it’s possible to diagnose and even resolve many dishwasher problems by yourself without needing to call for dishwasher repair, particularly if you happen to own a multimeter.

You could find you are able to sort out the fault quite easily by yourself, particularly if you are good at DIY, and if you can’t at worst you will be better placed to describe the fault when you do phone an engineer.

Things To Do If Your Dishwasher Won’t Turn on

In advance of searching for a replacement dishwasher there are a few possible problems you can troubleshoot without too much issue.

Safety Warning: Never attempt repairs while your machine is plugged in.

Common Dishwasher Faults That Will Prevent Your Machine From Turning On

Before you start checking your dishwasher for issues ensure that it hasn’t been unplugged, plus that none of the switches on the circuit breaker have tripped.

At this point you should also check that the child lock hasn’t been activated plus try resetting your machine.

You will probably require the manual for this due to the fact that machines are all different however the child lock is often fairly easy to put on without meaning to. Similarly, the machine could have lights yet will not start, in this case the solution might be as simple as resetting the program.

When you have ruled out these issues it’s time for the real detective work to begin.

    1. Have a look at the door latch or door latch switch.
    2. Test the timer.
    3. Test the selector switch.
    4. Test the motor relay.
    5. Examine the thermal fuse.
    6. Check the drive motor.

To test these electrical components you will have to have a multimeter, or VOM (volt-ohm-milliammeter) to measure the resistance plus check the parts are working as they are meant to.

Testing the Door Latch as well as the Door Latch Switch

The initial thing to test is the door latches plus door latch switches. Your machine is designed not to start if the door latches are faulty for obvious reasons. You wouldn’t want to be able to inadvertently run the machine with the door open.

A broken switch will stop your dishwasher from starting and completing a cycle. You should check the switch with a multimeter. The switch is generally located under the front door panel or control panel.

Make sure you have disconnected power to the machine prior to removing the door panel plus checking for continuity to ensure you do not get an electric shock.

If the latches or switches are not working you will need to replace them.

Checking the Timer

If you have tested your door latch as well as door latch switch and ascertained they are working correctly the next thing to test is the timer or electronic control.

This is the component that sends power to all the other electrical components the machine requires to operate such as the pumps, as well as the valves.

If your dishwasher has an electric control rather than a mechanical timer then it could have to be tested while live, in which case you should call an engineer.

Checking the Selector Switch

This is the part of your machine that selects the program , it’s style and location will vary contingent on the make or model of your machine. A faulty selector switch or even one that has not been fully depressed might result in the dishwasher not to start.

You should be able to visually investigate to see if the buttons are going down all the way, or you may have to disconnect the dishwasher in order to access the control panel to check the connections for continuity with the help of a multimeter.

Checking the Motor Relay

The motor relay is an alternative part that could cause your machine not to run, and this may be the fault if you have checked the control panel and thus have ascertained that there should be power running to the main pump.

To test if this is the case you will have to locate the motor as well as find the relay that will usually be mounted next to it. This can then be removed plus tested with the help of a multimeter, if broken it might have to be replaced.

Examining the Thermal Fuse

When you have investigated all the above and are yet to find the issue the next part of the dishwasher to investigate would be the thermal fuse. This may or may not be present and is there to stop the control board overheating.

If you will need to replace it in order for the control board to get power.

Checking the Drive Motor

The final component you could test that could prevent your dishwasher from running is the drive motor. This is the component that moves the water around to wash your dishes.

If you have checked the other components and still haven’t discovered the issue this may be the culprit particularly if your machine has previously been making a loud humming noise.

You can usually gain access to the motor by taking off the panel at the bottom of the machine. Check it with the help of a multimeter and replace if broken.

When to Contact an Engineer

If you don’t have a multimeter or are not confident in taking panels off your machine and testing the components then you will be better off calling a repair person sooner rather than later.

If you are happy to perform the above troubleshooting then you might well be able to fix the issue without needing a professional. Yet if you are not sure it’s always better to call in the professionals.

Don’t forget to have a look at your warranty and your home cover as dishwasher repairs could be covered meaning the expense could be less than you were expecting.

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