Kenworth Heater Box Assembly — Complete Stainless Steel HVAC Box Replacement, Ready to Install

Complete Stainless Steel HVAC Box Assembly – Aftermarket Heater & AC Replacement for Kenworth Trucks This complete aftermarket HVAC box assembly is designed as a direct replacement for failing or aging Kenworth cab airboxes. Proudly manufactured by Truck Parts Line, it is built from 100% stainless steel for superior rust resistance, long-term durability, and dependable heating and cooling performance in demanding heavy-duty applications. Unlike OEM units that can rust, weaken, and fail over time, this stainless steel assembly is built to help reduce repeat repairs, prevent unnecessary downtime, and keep your truck operating reliably. This is a full replacement assembly — not a heater core or partial kit. What’s Included: Stainless steel HVAC box housing High-efficiency heater core / coil heater AC evaporator Expansion valve Thermostatic switch Enhanced blower motor Vehicle Compatibility: This assembly is compatible with the following Kenworth truck models: Kenworth T600 (1987–1990) Kenworth T600 Aerocab (1994–2007) Kenworth T660 (2008–2014) Kenworth T800 (1987–2014) Kenworth T800 Curved Glass (1993–2014) Kenworth W900 (1987–2014) Kenworth W900B Aerocab (1994–2014) Kenworth W900L (1990–2014) Kenworth W900L Aerocab (1994–2014) Replaces OEM Part Numbers: F31-1036-1, F31-10361, F31-1064-11112, F31-1064-11122, F31-1072-11110, F31-1072-11120, K142-535-1, K1425351, TE6260J2, 740185-2, and F31-1053-001. Key Features & Benefits: 100% Stainless Steel Construction: Built with stainless steel panels and fasteners to resist rust and corrosion in harsh working conditions. Direct-Fit Aftermarket Replacement: Engineered for proper fitment and dependable performance on compatible Kenworth models. Longer Service Life: Strong stainless steel construction and welded design provide improved durability compared to many OEM-style units. Complete Assembly Convenience: Includes major HVAC components in one unit, helping simplify replacement and reduce the risk of ordering separate parts. Improved Reliability: Helps restore heating and cooling performance while reducing the chance of repeat HVAC box failures. Why Choose This Stainless Steel HVAC Box? OEM and older cab airboxes can rust from the inside out, leading to poor HVAC performance, repeat breakdowns, coolant or component issues, and costly downtime. This stainless steel replacement is designed to solve that problem at the source by providing a more durable, rust-resistant alternative built for long-term use. For truck owners, diesel mechanics, and repair shops, this means a more dependable replacement that is ready to install and built to last. Shipping & Support: Free Shipping: Available across the USA and Canada. Fast Dispatch: Ships within 1 business day in most cases. Dealer Inquiries Welcome: Contact us for volume orders or partnership opportunities. Upgrade your truck’s HVAC system with a complete stainless steel Kenworth HVAC box assembly built for durability, fitment, and dependable real-world performance. �� Installation Instructions This Kenworth HVAC Box includes all major components and is designed for straightforward installation. For detailed removal and installation procedures, photos, and helpful tips, please refer to our complete installation guide. Open Installation Guide →