Joni Service & Maintenance

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At GCS we know that having your JONI Equipment operational is business critical. For this reason we provide maintenance and repair service throughout the UK and can repair and service all JONI equipment.

We have trained service engineers who can provide a quick response to customers who need emergency repairs and routine servicing on all of our range and other manufacturers also.

Extensive Parts Inventory

JONI is prepared to address a variety of repair needs quickly and effectively thanks to our extensive stock of parts. Our diverse inventory ensures that we have the necessary components to service all models of JONI equipment.

High first time fix rate

Our experienced team of technicians have a high first-time fix rate, demonstrating their ability to accurately diagnose and resolve issues with your JONI equipment on the initial visit. This efficiency saves time, reduces costs, and minimises disruptions for our valued customers.

DBS certified engineers nationwide

With access to a network of over 60 DBS-certified engineers across the UK, GCS provides access to a team of highly qualified professionals. The certification guarantees that the engineers have passed through background checks, instilling trust and reliability for on-site repairs and maintenance.

Fast response time

Our dedication to prompt service guarantees that our team promptly addresses customer inquiries and repair requests. By minimising delays, we aim to reduce equipment downtime and ensure our clients receive timely assistance, keeping their operations running seamlessly.

Our comprehensive JONI service

At JEROS, we are proud to provide a diverse range of comprehensive warewashing services customised to suit your business’s individual requirements. Whether it’s responsive call-out services or innovative solutions, we are dedicated to ensuring that your JONI equipment runs smoothly and efficiently.

Swift Call Out Service

With a demonstrated history of quickly addressing service calls, we recognise the significance of reducing downtime. Our engineers are available seven days a week to swiftly restore essential equipment. Benefit from a high first-time fix rate, ensuring minimal disruption to your operations.

Transparent equipment repairs

We prioritise cost-effective repairs over sales pitches. Our approach involves providing honest assessments, discussing the feasibility of repairs, and determining if fixing the equipment is worthwhile. Our goal is to prolong the lifespan of your JONI equipment while maximising its performance.

Results-Driven Solutions

We know all too well the challenges of non operational equipment. With over 60 years of hands-on experience, we are the market leaders in diagnosing and resolving such problems.  Count on us to identify the root cause and offer practical, cost-effective solutions.

Reactive Call Out

Engineer attendance to site for an unexpected problem to diagnose what the issues is, if possible remedy the issue or to ascertain what parts are needed, quote prices and plan a second visit.

Pricing based on £175.00+VAT for call out and first hours labour then £85.00+VAT per hour thereafter.


Site visit by engineer to assess unit and carry out 19 point check to provide full report on condition and any additional parts/work required. Will include full annual replacement of bearings and seals (parts included in price), topping up of all oil as required, checking of all functionality and moving parts and assessment of contactors, actuators, gas springs, safety valves, vacuum valves, venting valve, stirrer bearing, scrapers, all gaskets, steam hoses and on return valves.


Make A Service / Maintenance Enquiry

Use the form below to contact us with any questions you might have about the Joni range.  Alternatively, you can also call us on the number below

CALL 01302 340742

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If A Gas Appliance Please Confirm You Have A Fully Working Extract Canopy With Gas Interlock and The Item Was Installed By A Commercially Qualified Gas Engineer
I understand any issue through normal breakdown during the warranty period will be carried out free of charge. Any work required that is non warranty would be chargeable.

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