Commercial Dishwasher Repair And Maintenance

Commercial Dishwasher

As a business owner, you rely on your commercial dishwasher to keep your operation running smoothly at all times. Unfortunately, this also means that when your dishwasher fails to operate properly, you’re left in a sticky situation, where the dishes start to pile up fast, and your profits can quickly take a nosedive.

Although inconvenient, when these things happen, there are a few simple troubleshooting steps you can take to resolve the issue, or at least to diagnose what’s wrong with the appliance in the first place. 

Let’s take a look!

Dishwasher won’t clean properly

There’s almost nothing worse than running a load of dishes, only for them to come out just as dirty as they were when they went in. 

However, this annoyance is most often caused by a dishwasher that’s been overloaded. 

Therefore, to avoid dishes that don’t get cleaned, make sure you’re not overloading the dishwasher and that there’s enough space between each dish to allow the soapy water to get at it. 

In this case, there might not be anything wrong with your dishwasher, and the issue is caused by the unit being overloaded.

The dishwasher won’t fill up

Alternatively, sometimes there is something wrong with the machine, causing your dishes to come out dirty. Most often, this will be caused by a problem with your water supply.

Examine the water supply

Water supply lines

For starters, you’ll need to check your water supply lines and connection points to make sure that water is, in fact, making its way to the unit with enough pressure. 

Leaks or clogs can both contribute to a reduction in water pressure, causing your problems.

Water Inlet valve

Dishwasher inlet valve

Additionally, you’ll want to check and make sure that your unit’s water supply is turned on and opened all the way. 

Even if the water valve is on, if it’s not opened all the way, it might be causing a reduction in water pressure, which is causing your problem. 

At the same time, make sure that all connections are tight and secure and that there’s no water leaking from any of them.

Clogged spray arms

When in use, the dishwasher’s spray arms rotate and spray several jets of water up onto your dishes to clean them. 

In other words, if the spray arms aren’t turning or aren’t spraying water, you’ll often end up with dirty dishes post-wash cycle. 

First, to troubleshoot your spray arms, start by removing the dish rack and trying to rotate the spray arm manually. You should be able to do so with very little resistance, and the spray arm should be able to rotate a full 360 degrees. 

If you feel any resistance or unable to turn the spray arm, you might have a broken bearing, or there may be something blocking it from spinning during a wash cycle. 

In some cases, a build-up of minerals or dirt can even cause the spray arm to seize up. Therefore, if it’s been a while, you may be able to get things moving again by thoroughly cleaning the spray arms moving parts.

Commercial Dishwasher spray arms

Dishwasher is not heating up

Most dishwashers have a feature that will heat the unit inside to help dry your dishes after a wash cycle. When your unit fails to heat up properly, your dishes will still likely come out clean, but they’ll often still be soaking wet.

Broken heating element

Dishwasher heating element

The most common cause of a dishwasher that won’t heat up is a faulty heating element. 

Some dishwasher units may have one or more heating elements, usually located at the inside chamber’s bottom or top. 

While diagnosing a faulty element can often be done on your own, finding the right replacement part and repairing your dishwasher is a bit more complicated. 


Dishwasher thermostat

Your dishwasher’s thermostat helps the unit read its internal temperature. 

Therefore, when the components become faulty, your unit may not heat up whatsoever, or it may even overheat. Either way, a faulty thermostat is most often accompanied by an error code, which will help you (or us) diagnose your problem quickly!

If you’re unsure how to go about fixing your unit, it might be best to contact a professional appliance repair service.

Dishwasher is leaking

While minor leaks aren’t so bad, a bad water leak can easily be a big worry! 

Fortunately, most dishwasher leaks are caused by a worn-out, faulty door gasket, a door that doesn’t close properly, or a faulty connection.

Damaged Door Gasket

Dishwasher door gasket

Your unit’s door gasket helps keep heat and water inside during a wash cycle, which means that when it’s not doing its job properly, you’ll often have a water leak. 

A damaged door gasket will often be hard, look worn out, cracked, or it might even be missing. 

Fortunately, replacing a door gasket is relatively simple and can be done by yourself, as long as you’re able to locate the correct replacement part.

Faulty hoses and connections

Dishwasher hose

If your leak isn’t coming from the door, you’ll want to check all your water lines and connections to try and pinpoint the source of the leak. 

You can tighten loose connections to try and stop the leak. However, if you’ve got a leaking supply hose and drain, you may need to replace it completely.

Commercial Dishwasher Maintenance Tips

  • Avoid overloading your dishwasher
  • Always check for food debris and clean them
  • Don’t mix cleaning products. Doing so may cause harmful gases or corrosion inside your dishwasher
  • Get professional maintenance service at least once a year

As a business owner, you rely on your dishwasher to work for you day in and day out! And this is precisely why you must get professional servicing and maintenance at least once per calendar year. 

Need a hand with your commercial dishwasher? Don’t hesitate to contact Littleton Appliance Pros today!

Dishwasher And Home Appliance Repair Near You

When you find a leak coming from your dishwasher, it doesn’t take long before the panic sets in. 

But it can be equally inconveniencing when your dishwasher fails to perform the way it once did.

So with that in mind, it’s important to regularly clean and maintain your dishwasher, which helps prevent leaks and other problems from popping up on your when you least expect it. Working with a trusted appliance company can help you do just that! 

Littleton Appliance Pros is proud to offer the best appliance installation, repairs, and maintenance in the region. 

Got a problem with your dishwasher? Don’t hesitate to contact us today!