Four Seasons 74852 HVAC Heater Control Valve

Four Seasons 74852 Heater Valve Overview

The Four Seasons 74852 is a temperature sensing electric heater valve built for HVAC temperature control systems that use an OE-style electric valve design. It is a plastic heater valve with two hose connectors and a 0.750 in. (19.050 mm) opening, made for direct replacement in select Ford, Mercury, and Lincoln applications.

Use this Four Seasons heater valve when servicing automatic temperature control systems that rely on electric coolant flow control for cabin heat regulation. The 74852 part number is used across multiple Crown Victoria, Grand Marquis, Town Car, Mustang, and related platforms.

Key Features

• Temperature sensing electric heater valve for HVAC temperature control
• OE replacement design for factory-style fit and function
• Plastic construction
• Two hose connectors
• 0.750 in. / 19.050 mm opening size
• Electric valve operation
• Four Seasons 74852 heater valve for select Ford, Mercury, and Lincoln vehicles

Detailed Product Description

Four Seasons Heater Valve line components are built for HVAC temperature control and coolant flow management in vehicles equipped with automatic temperature control or temperature sensing lockout systems. This 74852 heater valve is an OE replacement part that matches the original electric-valve style used in many Ford Crown Victoria, Mercury Grand Marquis, and Lincoln Town Car applications, along with other listed models. If you are replacing a worn or sticking heater control valve, Four Seasons 74852 provides the correct hose connection layout and opening size for the specified applications.

This part cross-references Monroe Shocks & Struts 5867 and UAC HV9506C for the same application.

Vehicle Fitment

• Fits 1992-2005 Ford Crown Victoria, w/ ATC (Automatic Temperature Control); Temperature Sensing / Lockout; Heater Valve
• Fits 1997-2005 Mercury Grand Marquis, Heater Valve
• Fits 1985-1986 Mercury Grand Marquis, Heater Valve
• Fits 1997-2004 Ford Grand Marquis, Heater Valve
• Fits 2003-2004 Mercury Marauder, Heater Valve
• Fits 2002-2003 Lincoln Town Car, Heater Valve
• Fits 1981 Lincoln Town Car, Heater Valve
• Fits 1982-2001 Lincoln Town Car, w/ ATC (Automatic Temperature Control); Temperature Sensing / Lockout; Heater Valve
• Fits 1983-1997 Ford Mustang, Temperature Sensing / Lockout; w/ AC; Heater Valve
• Fits 1991-1996 Ford Grand Marquis, w/ ATC (Automatic Temperature Control); Temperature Sensing / Lockout; Heater Valve
• Fits 1982-1996 Mercury Grand Marquis, w/ ATC (Automatic Temperature Control); Temperature Sensing / Lockout; Heater Valve
• Fits 1995 Ford Contour, Heater Valve
• Fits 1982-1992 Lincoln Continental, w/ ATC (Automatic Temperature Control); Temperature Sensing / Lockout; Heater Valve
• Fits 1987-1991 Ford LTD Crown Victoria, w/ ATC (Automatic Temperature Control); Temperature Sensing / Lockout; Heater Valve
• Fits 1987-1991 Mercury Colony Park, Heater Valve
• Fits 1982-1986 Ford LTD, Heater Valve
• Fits 1983-1986 Mercury Capri, Temperature Sensing / Lockout; w/ AC; Heater Valve
• Fits 1986 Mercury Marquis, w/ ATC (Automatic Temperature Control); Temperature Sensing; w/ AC; Heater Valve
• Fits 1982-1985 Mercury Marquis, w/ ATC (Automatic Temperature Control); Temperature Sensing / Lockout; w/ AC; Heater Valve
• Fits 1982-1984 Ford Thunderbird, w/ ATC (Automatic Temperature Control); Temperature Sensing / Lockout; Heater Valve
• Fits 1984 Lincoln Mark VII, w/ ATC (Automatic Temperature Control); Temperature Sensing / Lockout; Heater Valve
• Fits 1982-1984 Mercury Cougar, w/ ATC (Automatic Temperature Control); Temperature Sensing / Lockout; Heater Valve
• Fits 1982-1983 Lincoln Mark VI, w/ ATC (Automatic Temperature Control); Temperature Sensing / Lockout; Heater Valve

Common Repair Uses

• Restores heater coolant flow control when the original valve sticks open or closed
• Addresses inconsistent cabin temperature in automatic temperature control systems
• Helps correct weak heat output in Ford Crown Victoria and Mercury Grand Marquis HVAC systems
• Replaces a leaking or cracked heater valve housing on select Lincoln Town Car applications
• Supports proper heater operation in vehicles with temperature sensing lockout functions

Installation Notes and Tips

Verify hose connector count, opening size, and electric operation before installation. This valve uses two hose connectors and a 0.750 in. opening, so matching the original routing and hose diameter is important for proper fitment. Confirm the vehicle’s HVAC system configuration, especially ATC, temperature sensing, lockout, and A/C-related notes listed in the fitment data before replacing the part.

Quality Assurance

Four Seasons Heater Valve components are cataloged as OE replacement parts for factory-style HVAC service. Part number 74852 is listed with direct interchange references and application-specific fitment data to support accurate replacement selection.