Commercial Dishwasher Error Codes
Understanding Commercial Dishwasher Error Codes Before Replacing Parts
Seeing an error code appear on your commercial dishwasher can be frustrating—especially during a busy lunch or dinner service.
The good news is that an error code is often the dishwasher's way of telling you which operating system needs attention.
The important thing to understand is that an error code does not always identify the exact part that has failed.
Instead, most commercial dishwashers monitor systems such as water filling, heating, draining, pumps and temperature. When the machine detects that one of these systems is operating outside its expected parameters, it displays a fault code to assist diagnosis.
At Worldwide CDM, we've been helping restaurants, cafés, pubs, clubs, hotels, hospitals and commercial kitchens across Sydney minimise equipment downtime for more than 30 years. Our experienced technicians diagnose the underlying cause of the fault before recommending repairs, helping you avoid unnecessary replacement of parts and get your kitchen back to operating efficiently.
What Is a Commercial Dishwasher Error Code?
Modern commercial dishwashers continuously monitor their operation using sensors and electronic control systems.
Depending on the make and model, they may monitor:
Water temperature
Boiler temperature
Wash tank temperature
Water levels
Filling
Draining
Pump operation
Door safety switches
Heating systems
Electrical components
Communication between control modules
If the dishwasher detects that one of these systems is not operating as expected, it may display a fault code.
These codes are designed to assist diagnosis. They are not always confirmation that a particular component has failed.
Why Error Codes Appear
An error code simply tells you that the dishwasher has detected something outside its normal operating range.
For example, the machine may detect that:
Water is taking too long to fill.
Water isn't draining correctly.
The rinse boiler hasn't reached its target temperature within the programmed time.
A temperature sensor is returning an unexpected reading.
A safety device has been activated.
An electrical component isn't responding correctly.
Several different faults can produce the same error code, which is why professional diagnosis is important before replacing parts.
Common Systems That Generate Error Codes
Heating System
Heating-related fault codes may appear when the dishwasher cannot achieve the operating temperatures expected by the manufacturer.
Depending on the machine, possible causes may include:
Heating element problems
Booster heater issues
Temperature sensor faults
Electrical control faults
Mineral scale affecting heat transfer
Related guides:
Water Filling System
The dishwasher monitors how quickly it fills and whether the correct water level has been reached.
Possible causes may include:
Water supply interruptions
Water inlet valve problems
Water level sensor faults
Pressure switch issues
Related guide:
Commercial Dishwasher Not Filling With Water
Drainage System
Commercial dishwashers monitor how effectively wastewater leaves the machine.
Possible causes include:
Blocked filters
Restricted drain hoses
Drain pump problems
Drain valve faults
Water level sensor issues
Related guide:
Commercial Dishwasher Not Draining
Electrical System
Modern commercial dishwashers rely on electronic controls, relays and safety systems.
Electrical faults may involve:
Control boards
Wiring
Relays
Motors
Power supply problems
Related guides:
Genuine Error Code Examples
Every commercial dishwasher manufacturer develops its own diagnostic software, so there is no universal error code system.
The examples below show how fault codes are used to identify operating systems rather than specific failed components.
Genuine Example: Eswood Smartwash Error Codes
Eswood Smartwash commercial dishwashers include an electronic self-diagnostic system that monitors important operating functions such as water filling, draining, heating and temperature sensing. When the machine detects an operating condition outside its programmed limits, it displays an error code to assist with diagnosis.
It's important to remember that these codes identify the system experiencing the problem, not necessarily the exact component that requires replacement. Professional diagnosis is still required to determine the underlying cause.
Er02 – Drainage Fault
The dishwasher has detected that wastewater has not drained correctly within the expected time.
Possible causes may include:
Blocked filters
Restricted drain hose
Drain pump problems
Drain valve faults
Water level sensing issues
Related Guide: Commercial Dishwasher Not Draining
Er04 – Water Filling Fault
This code indicates that the dishwasher has been unable to fill the wash tank correctly.
Possible causes may include:
Interrupted water supply
Water inlet valve problems
Water level sensor faults
Pressure switch issues
Related Guide: Commercial Dishwasher Not Filling With Water
Er07 – Boiler Temperature Probe Fault
This code indicates the dishwasher has detected a problem with the boiler temperature sensing circuit.
Possible causes may include:
Temperature probe fault
Wiring issue
Electrical connection problem
Electronic control fault
Related Guides:
ErSF – Safety Protection Activated
This safety code indicates the dishwasher has detected an operating condition outside its programmed safety limits.
The exact cause varies depending on the operating conditions and machine model, but may involve:
Temperature monitoring
Water level protection
Electrical safety systems
Internal control faults
Professional diagnosis is recommended before resetting or continuing to operate the dishwasher.
Why These Error Codes Don't Always Mean a Specific Part Has Failed
One of the biggest misconceptions is that an error code tells you exactly which part to replace.
In reality, the dishwasher is simply reporting which operating system requires attention.
For example, an Er02 drainage fault doesn't automatically mean the drain pump has failed. The same code could be triggered by blocked filters, a restricted drain hose, a faulty drain valve or another issue affecting the drainage system.
That's why our technicians diagnose the complete system before recommending repairs. Our goal is to identify the actual cause of the fault and recommend only the repairs your equipment genuinely needs.
Why Different Brands Use Different Error Codes
One of the biggest misconceptions is that an error code means the same thing on every commercial dishwasher.
It doesn't.
An Er02 on an Eswood dishwasher is unrelated to an E2 or E02 displayed on another manufacturer's machine.
Every manufacturer develops its own control software, programming logic and diagnostic sequences.
For this reason, interpreting an error code always begins with identifying:
Manufacturer
Model
Symptoms
When the code appears
The code is one piece of the diagnosis—not the complete diagnosis.
Why Correct Diagnosis Matters
Many error codes identify the system experiencing the problem, not the failed component.
For example:
A heating-related fault could involve:
Heating element
Booster heater
Temperature sensor
Thermostat
Control board
Wiring
Mineral scale
A drainage fault could involve:
Filters
Drain pump
Drain hose
Drain valve
Water level sensor
Although the dishwasher displays the same error code, the required repair can be completely different.
At Worldwide CDM, we diagnose the complete system before recommending repairs because we believe in providing honest advice and only replacing components when they're genuinely required.
Safe Operator Checks
Before arranging a service visit, operators can safely:
✔ Record the exact error code.
✔ Take a photo of the display.
✔ Note when the code appears during the wash cycle.
✔ Confirm the machine has water and power.
✔ Clean accessible filters.
✔ Check whether another cycle produces the same fault.
Do not bypass safety devices or repeatedly reset fault codes without understanding why they appeared.
Can Continued Use Cause Damage?
That depends on the fault.
Some error codes simply stop the dishwasher operating until the issue has been resolved.
Others may indicate developing problems that could reduce cleaning performance or increase wear if ignored.
If the same fault code repeatedly appears, arranging professional diagnosis helps reduce the risk of further downtime and unnecessary repair costs.
Preventing Error Codes
Routine preventative maintenance helps identify developing faults before they interrupt service.
Preventative servicing may include:
Testing operating temperatures
Checking pumps
Inspecting heating systems
Cleaning filters
Verifying water levels
Inspecting electrical components
Identifying worn parts before failure
Combined with daily operator cleaning, preventative maintenance helps improve equipment reliability and reduce unexpected breakdowns.
Commercial Dishwasher Brands We Repair
Worldwide CDM repairs and services many leading commercial dishwasher brands, including:
Don't see your dishwasher brand listed?
Our experienced technicians repair many other commercial dishwasher makes and models used throughout Sydney.
What Happens When You Book a Service?
Arranging a commercial catering equipment repair shouldn't be complicated.
When you contact Worldwide CDM, we'll guide you through the process from your first phone call through to the completion of your repair, keeping you informed every step of the way.
Step 1 – Tell Us About the Problem
Contact our team and let us know:
What type of commercial equipment you have.
The make and model (if known).
The symptoms you've noticed.
Whether any error codes are displayed.
When the problem started.
This information helps us understand the issue before attending your site and allows us to prepare where possible.
Step 2 – Professional Diagnosis
One of our experienced technicians will inspect your commercial catering equipment and identify the underlying cause of the fault.
Many commercial dishwasher problems produce similar symptoms, so we focus on accurate diagnosis before recommending any repairs.
Rather than replacing parts based on assumptions, we investigate the complete system to determine what's actually causing the problem.
Step 3 – Honest Advice and Transparent Recommendations
Once we've identified the fault, we'll explain:
What we've found.
Why the problem has occurred.
The recommended repair.
Whether replacement parts are required.
Any available options.
If genuine manufacturer spare parts are available, we'll recommend their use to help maintain compatibility and reliable performance.
Our philosophy has always been simple:
We recommend only the repairs your equipment genuinely needs.
If a repair isn't necessary, we'll tell you.
Step 4 – Get Back to Business
Our goal is to restore your equipment as efficiently and professionally as possible, helping minimise disruption to your kitchen and allowing you to get back to serving your customers with confidence.
Whether we're repairing a commercial dishwasher, glasswasher, oven, fryer or another piece of commercial catering equipment, we're focused on providing practical solutions and reliable workmanship that help keep your kitchen operating smoothly.
Why Choose Worldwide CDM?
Choosing the right repair company isn't just about fixing today's problem—it's about finding a team you can trust whenever your commercial kitchen equipment needs attention.
For more than 30 years, Worldwide CDM has supported Sydney's hospitality industry with honest advice, professional repairs and dependable service.
When you choose Worldwide CDM, you can expect:
✔ Family-owned and operated business
✔ Supporting Sydney's hospitality industry for over 30 years
✔ Experienced technicians specialising in commercial catering equipment
✔ Honest advice with no unnecessary repairs recommended
✔ Genuine manufacturer spare parts where available
✔ Preventative maintenance to help reduce unexpected breakdowns
✔ Professional workmanship backed by decades of industry experience
✔ Clear communication throughout the repair process
Frequently Asked Questions
Does an error code always mean a part has failed?
Not necessarily.
Most commercial dishwashers use error codes to indicate that the machine has detected an abnormal operating condition. Further diagnosis is usually required to determine the underlying cause before replacement parts are recommended.
Can I clear an error code by turning the dishwasher off?
Some commercial dishwashers will clear certain fault codes after restarting, while others will continue displaying the code until the underlying problem has been resolved.
If the same error code repeatedly returns, professional diagnosis is recommended.
Why do different dishwasher brands use different error codes?
Commercial dishwasher manufacturers develop their own electronic control systems and diagnostic software.
This means the same code may represent completely different faults depending on the manufacturer and model.
Always interpret fault codes using information relevant to your specific dishwasher.
Should I continue using my commercial dishwasher if an error code appears?
That depends on the type of fault and how the dishwasher is operating.
If the dishwasher repeatedly displays the same error code, cannot complete a wash cycle or is showing signs of poor performance, it's advisable to arrange professional diagnosis to help prevent further downtime or equipment damage.
Can I diagnose the fault myself using the error code?
Error codes provide a useful starting point, but they don't always identify the exact component that has failed.
Many different faults can generate the same code, so professional diagnosis is often the most reliable way to determine the correct repair.
Need Commercial Dishwasher Repairs in Sydney?
When you suspect your commercial dishwasher has a heating element problem, the most important step is identifying the actual cause of the fault.
For more than 30 years, Worldwide CDM has helped restaurants, cafés, pubs, clubs, hotels, hospitals and commercial kitchens throughout Sydney minimise downtime through honest advice, professional repairs and preventative maintenance.
Our experienced technicians diagnose heating system faults, explain the recommended repair and use genuine manufacturer spare parts where available to help restore reliable performance.
Related Commercial Catering Equipment Repairs
Worldwide CDM also provides professional repairs for: