Dorman 604-5402 HD Solutions HVAC Heater Control Valve Actuator for Peterbilt

The Dorman HD Solutions 604-5402 is a direct-replacement HVAC heater control valve actuator engineered for select Peterbilt heavy-duty trucks. Designed to match the fit and function of the original failed component, this valve restores the proper flow of hot coolant through the heater core to maintain reliable cabin heating and temperature regulation.

Key Features:

• Direct replacement fit – engineered to match OE specifications for a straightforward, hassle-free installation
• Restores heater function – regulates coolant flow through the heater core to bring back proper cabin heat output
• Durable construction – built from quality materials to deliver long-lasting performance and service life in demanding heavy-duty applications
• HD Solutions line – part of Dorman's heavy-duty vehicle product lineup, backed by over 100 years of automotive aftermarket expertise
• Expert support – backed by a U.S.-based team of product specialists

When a heater control valve fails, coolant flow to the heater core is disrupted, resulting in little or no cabin heat. The Dorman 604-5402 provides a reliable, cost-effective solution to restore full HVAC function to your Peterbilt truck without the expense of dealer parts.