Four Seasons 74701 HVAC Heater Control Valve - Front

Four Seasons 74701 Heater Control Valve

The Four Seasons Heater Valve 74701 is an OE replacement HVAC heater control valve built for vacuum-operated temperature control systems. It uses a vacuum-closing bypass design with four hose connectors and 0.625 in. (15.875 mm) openings for direct-fit service on many Chrysler, Dodge, and Plymouth applications.

Four Seasons Heater Valve line components are built for replacement of original heater control hardware in vehicles that rely on vacuum actuation to regulate coolant flow through the heater circuit. This part number, 74701, is used in a wide range of late-1980s and early-1990s Chrysler-family vehicles, including Caravan, Voyager, Dakota, LeBaron, and Daytona applications.

Key Features

• Vacuum-operated heater control valve with bypass function
• OE replacement design for factory-style HVAC service
• Plastic construction for heater circuit use
• Four hose connectors for multi-port routing
• 0.625 in. / 15.875 mm openings on all ports
• Direct application coverage for select Dodge, Chrysler, and Plymouth models

Fitment Coverage

• Fits 1984-1995 Dodge Caravan, Heater Valve
• Fits 1984-1995 Plymouth Voyager, Heater Valve
• Fits 1987-1993 Dodge Dakota, Heater Valve; compatible with vehicles equipped with air conditioning
• Fits 1990-1992 Chrysler LeBaron, Heater Valve
• Fits 1982-1988 Chrysler LeBaron, Heater Valve
• Fits 1992 Dodge Shadow, Heater Valve
• Fits 1987-1990 Dodge Shadow, Heater Valve
• Fits 1987-1990 Chrysler Daytona, Heater Valve
• Fits 1984 Chrysler Daytona, Heater Valve
• Fits 1984-1990 Dodge Daytona, Heater Valve
• Fits 1990 Dodge Spirit, Heater Valve
• Fits 1989-1990 Plymouth Acclaim, Heater Valve
• Fits 1987-1990 Plymouth Sundance, Heater Valve
• Fits 1982-1989 Dodge Aries, Heater Valve
• Fits 1988-1989 Dodge Grand Caravan, Heater Valve
• Fits 1985-1989 Dodge Lancer, Heater Valve
• Fits 1982-1989 Plymouth Reliant, Heater Valve
• Fits 1986-1988 Chrysler New Yorker, Heater Valve
• Fits 1983-1984 Chrysler New Yorker, Heater Valve
• Fits 1984-1988 Chrysler Town & Country, Heater Valve
• Fits 1983-1988 Dodge 600, Heater Valve
• Fits 1987-1988 Plymouth Grand Voyager, Heater Valve
• Fits 1984-1986 Chrysler Laser, Heater Valve
• Fits 1985 Dodge Charger, Heater Valve
• Fits 1982-1983 Chrysler Town & Country, Heater Valve; w/ 4 heater valve ports
• Fits 1982 Dodge Rampage, Heater Valve; compatible with vehicles equipped with air conditioning

Common Repair Uses

• Restores heater coolant flow control when the original valve sticks open or closed
• Addresses weak cabin heat caused by a failing vacuum heater valve
• Helps correct temperature control issues in Chrysler, Dodge, and Plymouth HVAC systems
• Replaces cracked plastic valve bodies or leaking hose connections
• Supports proper bypass operation in vacuum-controlled heater circuits

Installation Notes

Verify hose routing, connector count, and port size before installation. This valve uses vacuum operation and a bypass style layout, so the vacuum source and heater hose routing must match the original system configuration. Confirm vehicle application details for Dodge Caravan, Plymouth Voyager, Dodge Dakota, and other listed models before service.

This part cross-references Hayden 5916 and Bosch 15170 for the same application.

Quality Assurance

Four Seasons 74701 is an OE replacement heater control valve built to match factory-style HVAC service requirements for select Chrysler, Dodge, and Plymouth vehicles.