Four Seasons 39037 A/C Expansion Valve - Rear

Four Seasons 39037 Expansion Valve Overview

Four Seasons 39037 is a block-type A/C expansion valve for R134A systems, built from aluminum for the rear HVAC circuit. It is listed for the battery compartment application on 2005-2007 Ford Escape and 2006-2007 Mercury Mariner models.

As part of the Four Seasons Expansion Valve line, this component is an OE-style HVAC flow restrictor for service work on the rear air conditioning system. The 39037 expansion valve meets or exceeds OEM requirements and uses insert O-ring fittings for the liquid and suction connections.

Key Features

• Brand: Four Seasons
• Part number: 39037
• Part type: A/C expansion valve
• Block-type design for rear HVAC service
• Aluminum construction
• R134A refrigerant type
• Female FIO insert O-ring connections
• Mounting hole quantity: 2
• Style: w/o solenoid
• Super heat setting: 2.000
• Meets or exceeds OEM requirements

Detailed Description

The Four Seasons 39037 expansion valve regulates refrigerant flow into the evaporator to maintain proper system operation in the rear A/C circuit. It uses a block-type body with female suction and liquid fittings, including No. 10 suction inlet and outlet thread diameters and No. 6 liquid inlet with No. 8 liquid outlet thread diameters. The valve is configured for R134A systems and includes the specified green O-ring service points for the liquid and suction connections. For buyers searching for a Ford Escape rear expansion valve or Mercury Mariner rear A/C expansion valve, this part number 39037 matches the listed battery compartment application.

This part cross-references UAC EX10201C for the same application.

What It Helps Address

• Incorrect refrigerant metering at the evaporator
• Rear A/C cooling loss in the battery compartment circuit
• Uneven vent temperatures from the rear HVAC system
• Expansion valve restriction or internal wear
• Service replacement for a leaking or malfunctioning valve

Installation Notes and Tips

Verify the vehicle’s rear HVAC layout, refrigerant type, and fitting style before installation. Replace the valve only after the system has been properly evacuated and inspected for contamination, and confirm the O-ring sealing surfaces are clean and undamaged. This 39037 valve is listed for 2005-2007 Ford Escape, rear, battery compartment; and 2006-2007 Mercury Mariner, rear, battery compartment.

Quality Assurance

Four Seasons lists this expansion valve as meeting or exceeding OEM requirements, making it a direct-fit service part for the specified Ford Escape and Mercury Mariner rear A/C applications.