Four Seasons 20989 HVAC Binary Switch

Four Seasons 20989 Pressure Switch Overview

The Four Seasons 20989 HVAC binary pressure switch monitors refrigerant system pressure and helps control compressor operation in the air conditioning circuit. It is a system-mounted pressure switch with a female connector, male 10mm x 1.25 fitting, and Weather Pack connection for a secure electrical interface.

Built for direct replacement use on select Ford Escape, Mercury Mariner, and Ford Focus applications, this Four Seasons pressure switch meets or exceeds OEM requirements and is specified as an open, binary-style switch.

Key Features

• Four Seasons Pressure Switch, part number 20989
• HVAC binary switch for system-mounted pressure monitoring
• Female connector with 4 terminals
• Male fitting with 10mm x 1.25 thread size
• Open-comp style switch with black housing
• Weather Pack connector design
• Meets or exceeds OEM specifications

Detailed Product Description

The Four Seasons Pressure Switch line is focused on HVAC control components that manage refrigerant pressure signals in the vehicle air conditioning system. This Four Seasons 20989 switch is a binary pressure type that opens and closes based on system pressure thresholds, helping the A/C control circuit respond to low-pressure and high-pressure conditions. It is system mounted and uses a 4-terminal female connector with a male 10mm x 1.25 threaded fitting for installation in the refrigerant circuit.

Compatible With 2008-2010 Ford Escape, 2008-2010 Mercury Mariner, and 2002-2007 Ford Focus. This part cross-references UAC SW11002C for the same application. The Four Seasons 20989 is also referenced by multiple interchange numbers, making it a practical replacement choice when servicing the HVAC pressure switch on these vehicles.

Common Problems This Part Can Address

• A/C compressor not engaging due to incorrect pressure signal
• Compressor cycling too frequently from pressure switch faults
• HVAC system shutting down from an open or failed pressure switch
• Refrigerant pressure control issues in the A/C circuit
• Diagnostic trouble codes related to HVAC pressure switch operation

Installation Notes and Tips

Verify the connector style, terminal count, and 10mm x 1.25 thread size before installation. Because this is a system-mounted HVAC pressure switch, confirm refrigerant system condition and inspect the connector and sealing surfaces during replacement. Use the vehicle service procedure for pressure switch removal and installation on the Ford Escape, Mercury Mariner, or Ford Focus application.

Quality Assurance

This Four Seasons 20989 pressure switch is listed as meeting or exceeding OEM requirements for the specified applications. It is intended as a direct-fit HVAC replacement component for confirmed fitment vehicles.