HEATING

Truck Heating Parts & Systems For Peterbilt Trucks

Keeping a Peterbilt cab warm during cold-weather operation is essential for driver comfort and safety, and during sleeper operation, heating becomes a quality-of-life necessity for drivers resting between shifts. The heating system in a Peterbilt includes the engine-driven HVAC system, heater cores, blower motors, controls, and — increasingly important under no-idle regulations — auxiliary bunk heaters that maintain sleeper temperature without running the main engine. We carry heating components and systems for both cab and sleeper applications across Peterbilt model years.

Frequently asked questions about truck heating

What are the signs of a failing heater core on a Peterbilt truck?

A failing heater core typically presents as weak or no heat output despite the engine being at full operating temperature, a sweet antifreeze smell inside the cab (indicating a small internal leak), fogging of the windshield from the inside when the heater is running, or visible coolant drips or dampness on the passenger-side floorboard behind the dash. A leaking heater core should be addressed promptly — coolant loss degrades engine cooling system performance, and a failed heater core in winter conditions leaves a driver without cab heat and windshield defrost.

What is an auxiliary bunk heater, and why is it important for sleeper trucks?

An auxiliary bunk heater (sometimes called a diesel-fired heater or APU heater) is an independent heating unit — typically diesel-powered — that heats the sleeper cab without running the main engine. Brands like Espar, Webasto, and Regen use a small burner to generate heat from a minimal amount of diesel fuel, producing cab warmth at a fraction of the fuel cost of idling. Bunk heaters are increasingly important as anti-idling regulations in many states and urban areas restrict or prohibit extended engine idling during rest periods.

Can I install a bunk heater on a Peterbilt 579 myself?

Auxiliary bunk heater installation is a moderately involved job that requires routing a fuel line from the tank, cutting a penetration through the sleeper wall or floor for combustion air and exhaust, and wiring the control unit. Many owner-operators with mechanical experience complete bunk heater installations themselves, but professional installation is recommended if you are unfamiliar with diesel fuel line routing or cab penetration sealing. Improper installation can create fuel leaks or, in rare cases, carbon monoxide risks if combustion exhaust is not properly vented outside the cab.

Other parts you might need

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