Commercial Dishwasher Installation, Repairs, Servicing & Maintenance in London
If your business relies on daily food service, you’ll already recognise the critical role that a fully operational commercial dishwasher plays in maintaining efficiency, hygiene, and compliance with food safety standards.
A malfunctioning or underperforming dishwasher can significantly disrupt workflow—forcing your staff to either wash dishes manually or re-run them through inefficient cycles, both of which waste valuable time and resources.
Whether you manage a restaurant, canteen, catering company, hotel, or bar, your commercial dishwasher must operate with speed, reliability, and consistency to support seamless kitchen operations.
At PHS, we offer comprehensive commercial dishwasher installation, servicing, maintenance, and repair solutions designed to minimise downtime and maximise performance. We understand that any interruption to your kitchen operation is costly, which is why we prioritise proactive maintenance to identify and rectify faults before they escalate into major failures.
Ignoring early warning signs of mechanical or electrical issues—such as unusual noises, extended wash cycles, inconsistent water temperatures, or drainage problems—can lead to significant damage, costly repairs, or even equipment replacement.
Our experienced engineers are fully equipped to carry out diagnostics, planned preventative maintenance (PPM), and urgent repairs on all leading makes and models, helping your business maintain operational continuity and meet health and safety obligations.
Whether your commercial dishwasher is affected by one of the issues outlined below or a more complex, less common fault, you can rely on our team to resolve everything from minor operational inefficiencies to complete system failures.
Not all faults are equal—some are encountered more frequently and require targeted expertise. Below are the most commonly requested services we carry out:
- Repair of minor faults in under-counter commercial dishwashers
- Hood-type / passthrough dishwasher repairs
- Flight-type dishwasher diagnostics and repair
- Conveyor dishwasher system repairs
- Rack and tray repair or replacement
- Scheduled servicing and preventative maintenance
- Detection and repair of water leaks
- Troubleshooting and correction of poor wash performance
- Glasswasher servicing and repairs
- Pot washer fault identification and repair
With extensive industry experience, our engineers are highly familiar with recurring commercial dishwasher malfunctions. This allows us to arrive fully prepared—with a comprehensive stock of commonly required spare parts—ensuring swift and effective resolution, minimising disruption to your operation.
Our Commercial Dishwasher Repair Services in London
The Brands We Support
- Adler
- Aristarco
- Ata
- Blue Seal
- Brema
- Chefking
- Classeq
- Clenaware
- Colged
- Comenda
- Dawson
- DC
- Dexion
- DIHR
- Electrolux
- Elettrobar
- Elframo
- Fagor
- Granuldisk
- Hilta
- Hobart
- Hoonved
- Hoshizaki
- ITV
- Jemi
- Kromo
- Lamber Newscan
- Luxia
- Mach
- Maidaid
- Masterfrost
- Meiko
- Omniwash
- Project
- Sammic
- Silanos
- So-we-bo
- Univerbar
- Whirlpool
- Winterhalter
- Zanussi
If you don’t see your dishwasher brand on the list, no need to worry. Instead, inform us of the brand you use, and we’ll still get your dishwasher back up and running in no time.
A dishwasher that appears to be operating does not necessarily mean it is functioning correctly. Subtle signs of underlying faults should never be overlooked, as early intervention can prevent extensive damage, prolonged downtime, and costly repairs. If you observe any of the following symptoms, prompt action is strongly recommended:
Inlet Valve Malfunction: The inlet valve controls the flow of water into the dishwasher. A malfunctioning inlet valve may result in the unit overfilling, underfilling, or—under critical failure—flooding even when powered off. These issues require immediate attention to avoid water damage and operational disruption.
Visible Water Leaks: Water pooling beneath or around the dishwasher often indicates a damaged or deteriorated drain hose. If water is not draining effectively, it may also signal a blockage within the drain hose. Both issues compromise hygiene standards and should be addressed without delay.
Inadequate Water Heating: Proper sanitisation relies on water reaching and maintaining the correct temperature. If the water fails to heat to specification, the thermostat is likely defective and should be replaced. Operating a commercial dishwasher with inadequate heat levels risks non-compliance with hygiene regulations.
Repeated Wash Cycles for Clean Results: Having to run multiple wash cycles to achieve satisfactory cleaning performance is a clear indication of reduced water pressure or spray arm malfunction. In many cases, the issue stems from a failing circulation pump or blocked nozzles, both of which impair cleaning efficiency and increase utility costs.
Our engineers are trained to diagnose and resolve these faults swiftly, ensuring your equipment is restored to full operational capacity in the shortest time possible.
Signs That Your Commercial Dishwasher Needs Repair
Preventative Maintenance for Commercial Dishwashers in London
To maximise the operational lifespan and efficiency of your commercial dishwasher, implementing a structured preventative maintenance regime is essential. Proactive upkeep significantly reduces the likelihood of system malfunctions, ensures compliance with hygiene standards, and helps avoid costly downtime.
Use Only Manufacturer-Approved Chemicals: Always consult the equipment manufacturer’s guidelines to confirm the suitability of cleaning agents. Many commercial dishwashers are incompatible with harsh substances such as bleach, which can degrade internal components, damage seals, and impair overall functionality.
Routinely Clean the Filter: The filter should be thoroughly cleaned after every 20 wash cycles. Accumulated food debris can decompose over time, leading to foul odours and restricting water flow, which compromises wash performance.
Allow the Machine to Air-Dry: At the end of each operating day, leave the dishwasher door open to promote air-drying. Closing the unit while moisture remains inside encourages the growth of bacteria, mould, and unpleasant odours.
Pre-Rinse or Scrape Dishes Before Loading: To minimise strain on the filtration and drainage systems, remove excess food residue from dishes prior to placing them in the dishwasher. This simple practice reduces the risk of blockages within the drain hose and enhances the longevity of internal components.
Schedule Regular Professional Inspections: Even in the absence of visible faults, it is essential to arrange routine inspections by a qualified commercial dishwasher technician. These assessments allow for early detection of wear or developing issues, enabling cost-effective intervention before major breakdowns occur.
A consistent and well-executed maintenance schedule is key to ensuring your dishwasher continues to perform to the highest standard while avoiding unplanned disruptions.
Benefits of Regular Commercial Dishwasher Maintenance
Pre-empt and Prevent
Scheduling routine dishwasher maintenance allows you to avoid potential breakdowns by identifying problems when they first arise, and dealing with them promptly and efficiently to minimise the threat of bigger issues later down the line.
Compliance and Safety
Maintenance and repair work is necessary to ensure that your kitchen is compliant with the relevant regulatory standards. For one thing, well-maintained equipment means less risk of a fire. Staff safety should be a priority, and this means ensuring your equipment is performing as it should.
Extend the Lifespan of Your Equipment
Commercial dishwashers that are looked after properly will continue to perform for longer and you’re less likely to encounter breakdowns. Regular maintenance stops deterioration and maximises efficiency. Professional catering equipment maintenance is, therefore, an important way of protecting your investment. And well-maintained equipment also has a better resale value should you want to pass your equipment on at a later date.
Save Money
By dramatically reducing the risk of future breakdown and the disruption and downtime it entails, you save money in the long term. While unanticipated breakdowns can lead to lost revenue and disappointed customers, high-performing equipment is efficient, allows for a smooth operation and consistently delivers a quality service, boosting customer satisfaction and loyalty.
Commercial Dishwashers FAQs
We advise you to clean your dishwasher daily. After the day has concluded, give your dishwasher a deep cleaning to remove any potential bacteria build-up, food particles or other debris.
Yes, you should check your chemical levels daily. An insufficient level of detergent, sanitiser, or rinse aid means that you’ll mostly splash your dishes with water rather than sanitise them.
It’s recommended that you refill your dishwasher’s tank after 20 cycles of use. That said, using the tank for more than 20 cycles risks bacteria build-up, which can produce an awful smell if left unchecked for a long time.
Contact PHS Catering Equipment Engineers
Do you operate a commercial kitchen and require the assurance of a reliable engineering partner to support you during equipment emergencies?
Or are you looking to prevent unexpected dishwasher failures through scheduled maintenance and servicing of your commercial kitchen appliances?
If so, contact PHS Engineers Ltd today to speak with a knowledgeable member of our team.
You can reach us by telephone on 0208 252 8927 or submit an enquiry via our contact page. We are ready to provide prompt, professional assistance tailored to your operational requirements.