Password Services becomes part of Johnson Controls
We are proud to welcome the team from Password Services Air Conditioning Ltd into the Johnson Controls family. Now operating under the Johnson Controls name, this experienced team brings over 25 years of trusted HVAC expertise to our UK operations.
Founded in 1998, Password Services built a strong reputation for delivering high-quality service, maintenance, and installation of air conditioning, refrigeration, and heating systems. Their commitment to technical excellence and customer satisfaction has earned them long-standing relationships with major UK brands, including McDonald’s Restaurants (Franchise and Corporate), J D Wetherspoon, and The Restaurant Group.
As part of Johnson Controls, the team continues to deliver nationwide HVAC solutions with the same professionalism, reliability, and attention to detail that made them a trusted name in the industry. All engineers are fully qualified and undergo continuous training to ensure the highest standards of service and safety.
Whether you are looking for bespoke system design, expert installation, or responsive maintenance, Johnson Controls - powered by the legacy of Password Services - is here to support your business with complete HVAC solutions.

At Johnson Controls, we are committed to ensuring that the high standards of service, reliability, and technical excellence established by Password Services continue uninterrupted. That’s why, although the team now operates under the Johnson Controls name, there will be no immediate changes to the day-to-day operations of the business.
Our priority is to maintain continuity for our customers while we work closely with the former Password Services leadership to develop a thoughtful, long-term integration plan. This collaborative approach will allow us to align our systems, processes, and culture in a way that enhances our service offering without disrupting the customer experience.
The integration process will be gradual and carefully managed, ensuring that the values and strengths that made Password Services a trusted name in HVAC are preserved and enhanced within the Johnson Controls framework.
All existing service agreements will continue to be honoured, supported by our UK-wide network of highly trained service engineers. Whether you're an existing customer or new to Johnson Controls, you can expect the same dependable support, technical expertise, and commitment to excellence that have always been at the heart of the service.
Contact usComprehensive HVAC Solutions
Operating under the Johnson Controls name, our team continues to deliver a full suite of HVAC services for commercial and industrial clients:
- System Design & Specification
Bespoke HVAC solutions tailored to your building’s needs, with a focus on energy efficiency and sustainability. - Installation & Commissioning
Professional installation of air conditioning, refrigeration, and heating systems, ensuring compliance and optimal performance. - Service & Maintenance
Nationwide coverage with 24/7 support. Preventative maintenance programmes designed to reduce downtime and extend equipment life. - Refrigeration & Electrical Services
NICEIC-certified electrical works and refrigeration services for a wide range of applications. - Ventilation & Renewables
Design and installation of ventilation systems and renewable energy technologies including heat pumps and heat recovery units.


Heating, Cooling, Air Handling, and Controls
Every substantial facility needs efficient, reliable climate control. Today, Johnson Controls offers the largest portfolio of HVAC equipment and controls in the world. You can find our solutions at work in offices and factories, in warehouses and stores, in campuses and hospitals, in apartment buildings and hotels.
Our broad portfolio of solutions and controls is built on a foundation of innovation and expertise that dates back more than a century when our founder, Warren Johnson, invented the first modern thermostat. Whether you’re constructing a new facility or retrofitting an old one, we deliver cost-effective comfort and sustainable efficiency.
Explore our HVAC solutionsLegacy Password Services Documentation Downloads
This area is designed to support engineers, facility managers and service professionals across the UK who maintain or upgrade legacy Password Services systems.
Here, you’ll find:
- Archive Air Systems – Technical documentation and specifications for discontinued or legacy YORK air handling units.
- Legacy Control Systems – Reference materials for older TEC control platforms, including wiring diagrams and configuration guides.
- Roomtop Packaged AHUs – Historical data sheets and manuals for rooftop units no longer in active production.
- System Overview Files – Useful for understanding the architecture and operational principles of past YORK installations.
These resources are invaluable for troubleshooting, retrofitting or integrating legacy systems with modern building technologies.
Go to the Downloads Resource