Commercial Dishwasher Troubleshooting: Expert Tips for Quick Fix

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Commercial Dishwasher Troubleshooting: Expert Tips for Quick Fix
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When troubleshooting a commercial dishwasher, start by checking the power supply and water connections. Ensure that the inlet valve is open and there are no obstructions in the spray arms or filters.

In this blog post, we will talk about everything there is to know about Commercial Dishwasher Troubleshooting. Additionally, inspect for any leaks and look for error codes on the display panel. Moreover, running a maintenance cycle can help to resolve minor issues and keep the dishwasher running smoothly. Remember to consult the user manual for specific troubleshooting steps and contact a professional technician for complex problems.

By following these troubleshooting steps, you can effectively address common issues with a commercial dishwasher and maintain its optimal performance.

Common Issues And Solutions

Commercial dishwashers are essential for maintaining a smooth and efficient operation in any kitchen or food service establishment. However, like any machinery, they are prone to various issues that can disrupt their functionality. Here, we’ll delve into the common issues that arise with commercial dishwashers and their solutions, allowing you to troubleshoot and resolve these problems effectively.

Incorrect Loading Practices

A common challenge faced by commercial dishwashers is improper loading. Overloading can impede water circulation and cleaning effectiveness while underloading may lead to unnecessary water and energy consumption. Properly spacing and positioning dishes within the racks is crucial to addressing these issues and optimizing dishwasher performance.

Blockages In Spray Arms

Blockages in the spray arms can hinder the proper distribution of water, leading to ineffective cleaning. Regularly inspecting and cleaning the spray arms can prevent this issue. Use a wire or small brush to remove any debris or buildup that may be obstructing the water flow.

Problems With Soap Dispensers

Malfunctioning soap dispensers can result in dishes not being adequately cleaned. Check the soap dispenser for clogs or damage. Sometimes, simply refilling the soap reservoir or adjusting the dispenser settings can resolve the issue. If the problem persists, it may be necessary to replace the soap dispenser.

Water Temperature Inconsistencies

Inadequate water temperature can lead to subpar cleaning results. Regularly checking the water temperature and calibrating the dishwasher’s thermostat can help maintain the optimal temperature for cleaning. Additionally, cleaning the heating elements and ensuring adequate water flow can address temperature inconsistencies.

Understanding Error Codes

Deciphering Digital Readouts

When your commercial dishwasher encounters an issue, it often displays an error code to help pinpoint the problem. Deciphering these digital readouts can be crucial in troubleshooting the machine.

Manual References For Common Codes

The dishwasher’s manual usually contains a list of common error codes alongside their meanings and potential solutions. It’s essential to keep the manual handy for quick reference in case of an error code.

Tips For Quick Resets

If you encounter an error code, performing a quick reset may resolve the issue. This can involve simple steps such as power cycling or resetting specific components.

Water Flow Complications

When it comes to maintaining a smooth operation in your commercial kitchen, troubleshooting water flow complications in the dishwasher is crucial. These issues can disrupt the cleaning process and lead to unsanitary conditions. In order to ensure the efficient functioning of your commercial dishwasher, it is important to be proactive in identifying and resolving water flow complications.

Inspecting Water Inlet Valves

To check the water inlet valve in your dishwasher, start by turning it off and unplugging it. Look for the valve at the back of the dishwasher. See if there are any leaks, damage, or dirt on it. Check the water hose too for any problems. You can use a tool called a multimeter to test if the valve is working right. Listen for a humming sound if your valve works with a part called a solenoid. Clean the valve if you find any dirt. If the valve is damaged or still not working, think about getting a new one. Always follow safety rules and if you’re not sure, ask someone who knows more or get professional help.

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Maintaining Water Level Sensors

Water level sensors play a key role in regulating the amount of water in the dishwasher during the wash cycle. It is essential to regularly maintain and clean the water level sensors to prevent any blockages or malfunctions. Verify that the sensors are positioned correctly and free from any debris that could interfere with their operation.

Checking For Leaks And Drips

Leaks and drips in the dishwasher can lead to water flow complications, causing inefficiencies in the cleaning process. Inspect the dishwasher for any signs of leaks, including loose connections, damaged hoses, or worn gaskets. Addressing these issues promptly can help maintain the optimal flow of water and prevent potential water damage.

Electrical Malfunctions

When it comes to troubleshooting commercial dishwashers, electrical malfunctions can cause significant disruptions to the operation of the equipment. It is essential to have a systematic approach to diagnose and rectify these issues promptly to minimize downtime and maintain a smooth workflow in a commercial kitchen. In this section, we will explore the common electrical malfunctions that arise in commercial dishwashers and how to effectively troubleshoot them.

Testing Power Sources And Outlets

Proper functioning of a commercial dishwasher heavily relies on a consistent and adequate power supply. Testing power sources and outlets for voltage irregularities, loose connections, or damaged wiring is crucial to ensuring the smooth operation of the dishwasher. Use a multimeter to check the voltage and continuity of the power sources and outlets, and inspect for any signs of overheating or burning.

Signs Of Failing Heating Elements

Faulty heating elements can lead to inefficient dishwashing and may result in unsatisfactory cleaning results. Look out for signs of failing heating elements such as inconsistent water temperature, prolonged cycle times, or visible damage to the heating element itself. Perform a visual inspection and measure the resistance of the heating element using a multimeter to determine if it needs replacement.

Troubleshooting Control Boards

The control board is the brain of the commercial dishwasher, governing its various functions and cycles. Troubleshooting control boards involves checking for any loose connections, damaged components, or error codes displayed on the control panel. Inspect the control board for any signs of corrosion, and if possible, consult the dishwasher’s manual for diagnostic codes to pinpoint the specific issue.

Mechanical Wear And Tear

Commercial dishwashers are essential for keeping kitchen operations running smoothly, but over time, mechanical wear and tear can lead to operational issues. Understanding the signs of worn parts, knowing when to replace seals and gaskets, and identifying key lubrication points for longevity are crucial for maintaining the efficiency and effectiveness of your commercial dishwasher.

Identifying Worn Parts

When troubleshooting mechanical issues in a commercial dishwasher, identifying worn parts is the first step to resolving the problem. Common signs of worn parts may include excessive noise during operation, leaking, or reduced cleaning efficiency. Inspect the dishwasher components such as the spray arms, pumps, and bearings for visible signs of wear, corrosion, or damage. Regular inspection and proactive replacement of worn parts are essential to prevent costly breakdowns and ensure optimal dishwasher performance.

Replacement Guidelines For Seals And Gaskets

Seals and gaskets play a critical role in preventing water leaks and maintaining the pressure required for effective cleaning. When inspecting seals and gaskets, look for signs of deterioration, such as cracks, brittleness, or visible wear. It’s important to adhere to manufacturer guidelines when replacing seals and gaskets to ensure proper fit and function. Regular maintenance and timely replacement of seals and gaskets can significantly extend the lifespan of your commercial dishwasher and minimize the risk of water leaks or damage to other components.

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Lubrication Points For Longevity

Proper lubrication is essential for reducing friction, preventing excessive wear, and ensuring smooth operation of moving parts in a commercial dishwasher. When conducting maintenance, reference the manufacturer’s specifications to identify the lubrication points for bearings, cams, and other moving components. Utilize high-quality lubricants and follow the recommended lubrication intervals to extend the lifespan of critical dishwasher components and reduce the risk of mechanical failures.

Cleaning And Maintenance Schedule

When it comes to maintaining the efficiency and longevity of your commercial dishwasher, establishing a thorough cleaning and maintenance schedule is crucial. Properly caring for your dishwasher not only ensures that it operates at peak performance but also helps to prevent costly repairs down the line.

Regular Cleaning Tasks

  • Wipe down the exterior of the dishwasher with a damp cloth to remove any buildup of grime or debris.
  • Regularly remove and clean the filters to prevent clogs and maintain proper water drainage.
  • Inspect and clean the spray arms to remove any obstructions or buildup that may impact water flow and cleanliness of dishes.
  • Check and clean the gaskets and door seals for any leftover food particles or residue.

Deep Clean Procedures

  1. Remove and soak the filters and spray arms in a solution of warm water and mild detergent to dislodge stubborn deposits.
  2. Run a cleaning cycle with a commercial dishwasher cleaner to remove built-up grease and mineral deposits from the interior components.
  3. Inspect and scrub hard-to-reach areas such as the door gasket and interior walls to ensure thorough cleaning.

Preventative Maintenance Tips

  • Regularly check and clean the inlet and drain valves to prevent blockages and ensure proper water flow.
  • Monitor the water temperature to ensure it reaches the necessary levels for effective cleaning.
  • Schedule professional inspection and servicing to address any potential issues before they escalate.

Expert Tips For Optimal Performance

When it comes to maintaining a smooth and efficient operation in your commercial kitchen, a properly functioning dishwasher is crucial. Maximize the performance of your commercial dishwasher with these expert tips for optimal performance.

Best Practices For Detergent Use

Using the right detergent in the correct amount is essential for achieving sparkling clean dishes. Make sure to select a high-quality commercial dishwasher detergent suitable for your specific water hardness and dishwashing requirements. Refer to the manufacturer’s guidelines for the recommended detergent dosage based on water hardness and load size. Regularly clean and check the detergent dispenser to prevent clogs, ensuring the detergent can be dispensed properly during the wash cycle.

Fine-tuning Rinse Aids And Sanitizers

Rinse aids and sanitizers play a critical role in ensuring spotless and hygienic results. Adjust the rinse aid and sanitizer settings according to the water conditions and load type. Regularly inspect and clean the rinse aid and sanitizer dispensers and lines to prevent blockages or malfunctions. It’s also important to use the appropriate concentration of rinse aid and sanitizer, as too much or too little can impact the effectiveness of the dishwasher’s final rinse and sanitation processes.

Improving Drying Efficiency

To achieve optimal drying results, consider adjusting the temperature settings based on the type of dishes being washed and the water temperature. Inspect and clean the dishwasher’s heating element to ensure it operates at peak efficiency. Utilize a drying agent or an appropriate drying cycle to enhance the drying process, especially for items that are prone to retaining moisture.

Troubleshooting Uncommon Problems

While most commercial dishwasher issues can be resolved with common troubleshooting techniques, there are some uncommon problems that may require specialized attention. Here are some strategies to address less frequently encountered issues when it comes to maintaining your commercial dishwasher:

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Handling Persistent Odors

One uncommon problem that can arise with commercial dishwashers is persistent odors, which can be off-putting for both staff and patrons. To address this issue, consider the following steps:

  1. Regular cleaning: Ensure that the interior of the dishwasher, including the filters and drains, is cleaned regularly to prevent the buildup of food particles and bacteria that can cause odors.
  2. Use odor-neutralizing agents: Consider using specialized commercial dishwasher cleaning products designed to neutralize odors and leave the dishwasher smelling fresh.
  3. Inspect for mold or mildew: Check for any signs of mold or mildew growth in hard-to-reach areas of the dishwasher and address any issues promptly to prevent odors from developing.

Strategies For Tackling Stains And Spots

Stains and spots on dishware can be a common complaint in commercial settings, but persistent issues may require additional troubleshooting steps. Consider the following strategies:

  1. Adjust detergent levels: If dishes consistently emerge with stains or spots, consider adjusting the detergent dosage to ensure proper cleaning without leaving residue behind.
  2. Check water temperature: Ensure that the dishwasher is reaching the appropriate water temperatures for effective cleaning, as inadequate heat can contribute to staining issues.
  3. Inspect spray arms: Periodically inspect the dishwasher’s spray arms for clogs or damage that could impact the distribution of water during the cleaning cycle.

When To Call A Professional Technician

While many uncommon dishwasher issues can be resolved with proactive maintenance, there are times when it’s essential to enlist the expertise of a professional technician. Consider the following circumstances:

  • Electrical malfunctions: If the dishwasher exhibits electrical issues such as frequent tripping of circuit breakers or erratic behavior, it’s crucial to seek professional assistance to mitigate safety risks.
  • Mechanical failures: When components such as pumps, motors, or sensors fail to operate properly, a professional technician with specialized knowledge can diagnose and address the underlying issues.
  • Complex repairs: For complex repairs or issues that require specialized tools or expertise, it’s best to rely on the skills of a qualified technician to avoid complications or further damage.

Frequently Asked Questions On Commercial Dishwasher Troubleshooting

How To Troubleshoot A Commercial Dishwasher That Won’t Start?

To troubleshoot a commercial dishwasher that won’t start, check the power supply, inspect the door latch, and reset the circuit breaker. Verify the water supply and drain connections to ensure they are functioning properly. Additionally, consult the user manual for specific troubleshooting steps.

What Are the Common Causes Of Commercial Dishwasher Leaking?

Common causes of a commercial dishwasher leaking include damaged door gaskets, clogged drain lines, and overfilling. Check the door gaskets for wear and tear, clean the drain lines, and adjust the water level to prevent overfilling. Regular maintenance can help prevent leaks.

How To Fix A Commercial Dishwasher That Produces Cloudy Dishes?

To fix a commercial dishwasher that produces cloudy dishes, ensure the water temperature is at the recommended level and use the correct amount of detergent. Clean the dishwasher interior and perform regular maintenance to prevent mineral buildup, which can cause cloudy dishes.

Consider using a rinse aid for improved results.

Why Is The Commercial Dishwasher Not Properly Drying Dishes?

If a commercial dishwasher is not properly drying dishes, check the rinse aid dispenser and adjust the setting if needed. Ensure the water temperature is adequate and the dishes are stacked properly for optimal drying. Clean the dishwasher interior and inspect the heating element for any issues.


In troubleshooting a commercial dishwasher, identifying issues early can prevent costly repairs and downtime. By following these troubleshooting tips, you can effectively maintain and troubleshoot your dishwasher, ensuring smooth operations for your business. You can also read other helpful troubleshooting guides on Machine Solved. Stay proactive in fixing issues swiftly and seek professional assistance when needed.

Your diligence will pay off in the long run.

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