Making sure you get the
right parts when you need them

Aftermarket Parts and Products

Reliability is essential for vehicle OEMs and operators to minimise downtime. This is why we focus on guaranteeing our aftersales services are as reliable as our products. Our parts and products division is at the core of our aftermarket offering, ensuring you get the right parts when you need them.

Key Benefits

High stock levels

Downtime is costly, so we know how important it is to get the right parts to you as quickly as possible. We invest in maintaining high stock levels to ensure we are ready to ship when needed.

Next-day delivery

We understand you do not have time to wait when you need replacement parts. In the UK, we ship same day between Monday to Thursday for next day delivery when order is placed by 2pm.

Global availability

Across the globe, we work with high-quality approved distributors and service support partners required to hold specific stock levels to ensure you can quickly access the parts you need.

Our Rail Solutions

Grayson Thermal Systems design, manufacture, and supply driveline cooling, heating, and air conditioning products to low volume vehicle industries worldwide, including bus, coach, rail, off-highway, commercial vehicles and more. 


Electric Water Pumps

Electric Water Heaters

Our Services

Grayson Thermal Systems design, manufacture, and supply driveline cooling, heating, and air conditioning products to low volume vehicle industries worldwide, including bus, coach, rail, off-highway, commercial vehicles and more. 

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Parts and products, where and when you need them

Quick access to high-quality replacement and repair parts and products is fundamental to minimising vehicle downtime.

We invest in maintaining an extensive range of high-quality parts and products in stock, ready to ship to you when required.

For UK customers, we ensure that all orders placed by 2pm between Monday to Thursday are shipped on the same day for next-day delivery.

We also ensure to work with approved distributors and service support partners who also ensure high levels of stock availability, guaranteeing you can get the parts and products you need local to the operation of your vehicle.

To find out more about our aftermarket parts and products division and place an order, contact us today.

Grayson are committed to designing and manufacturing HVAC products that you can count on to be 100% reliable day after day. From exclusively manufactured systems all the way to your retrofit solution, you can expect a flexible product range to suit your needs.

For us, every customer is individual and unique, meaning that we take your specific requirements and create the perfect solution tailor made for you. Over 30 years in the business has given us the knowledge and experience to be prepared for any and every situation. Whether you are an operator upgrading your fleet by retrofitting with a new heating or air conditioning system, or you are an OEM looking for a system for your new vehicle, we can help.

And it doesn’t just stop at complete systems; we have a comprehensive range of off the shelf component parts including blowers, boost pumps, compressors, evaporators, and many more ready to be installed in your vehicle.

Thermo King

Since 2001, Grayson Thermal Systems has been a leader in the sales and service of Thermo King air conditioning parts and systems. Our long term agreement with Thermo King has allowed us to forge a great partnership which in turn has enabled us to collaborate closely on many different projects. By working together, Grayson and Thermo King are able to combine our skills and bring you the best products and service available. In 2013, Grayson were proud to be named as Thermo King’s service dealer for 2011 and dealer of the year for 2015 for bus and coach HVAC across Europe, Middle East, India, and Africa territories. This further highlights Grayson’s commitment to outstanding service and quality.

Product Range Includes:

    Servicing and Maintenance

    You can rely on us to provide the expertise needed to carry out thorough system servicing and maintenance. We have expert engineers, both in the field and at our service centre, with years of experience and expertise in maintaining and servicing our complex HVAC and thermal management systems to ensure you benefit from continued exceptional performance.

    Technical Support

    Access technical support quickly and easily when you need it by contacting our technical support team. Consisting of qualified engineers across a range of disciplines, we have the knowledge to help. Whether based in the UK or in any other region across the world, we can support your teams today.

    Learn more about us


    We work with you to provide thermal management solutions that meet your needs, no matter what the application. Discover our product ranges today.


    Looking for more information? From product brochures to detailed technical specifications, all our literature is easily and freely accessible at our Downloads Centre.


    From innovative electric-powered and hydrogen-powered buses to retrofit solutions for off-highway applications, we have the experience and expertise to meet the needs of your application.