Four Seasons 20975 HVAC Binary Switch

Four Seasons 20975 Pressure Switch

The Four Seasons Pressure Switch 20975 is a system-mounted HVAC binary switch built for pressure-based compressor control. It uses a 2-terminal female connector, a red steel body, and a 3/8 in. x 24 male fitting for direct service replacement on supported Mitsubishi applications.

Four Seasons Pressure Switches are part of the brand’s HVAC switch line, focused on restoring proper pressure signaling in air conditioning systems. This Four Seasons 20975 pressure switch meets or exceeds OEM requirements and is specified for Mitsubishi 3000GT, Diamante, Galant, Montero Sport, Mirage, and Montero fitments listed below.

Key Features

• Binary HVAC pressure switch for system-mounted applications
• Female connector with 2 terminals
• Red steel construction
• Male fitting with 3/8 in. x 24 thread size
• Open contact design with low-off at 28 psi and low-on at 33 psi
• Meets or exceeds OEM specifications
• Direct replacement part number 20975

Fitment

• Fits 1994-1999 Mitsubishi 3000GT, Pressure Switch
• Fits 1994-1999 Mitsubishi Diamante, Pressure Switch
• Fits 1999 Mitsubishi Galant, Pressure Switch
• Fits 1997-1999 Mitsubishi Montero Sport, Pressure Switch
• Fits 1994-1998 Mitsubishi Mirage, Pressure Switch
• Fits 1987-1988 Mitsubishi Montero, Pressure Switch

What This Part Helps Address

• Inconsistent A/C compressor cycling caused by pressure switch failure
• Compressor cutout issues related to incorrect system pressure signaling
• Loss of HVAC pressure control on Mitsubishi 3000GT and Diamante systems
• Fault codes or drivability concerns tied to a failed binary pressure switch
• Restoration of proper pressure-based A/C system operation

Installation Notes and Tips

Verify the connector style, thread size, and system-mounted location before installation. Confirm the vehicle’s A/C pressure switch specification matches the 28 psi low-off and 33 psi low-on operating points, and compare the original part number to Four Seasons 20975 before replacement.

This part cross-references Global Parts Distributors LLC 1711675 for the same application.

Quality Assurance

Four Seasons lists this pressure switch as meeting or exceeding OEM requirements, making it a direct-fit service part for confirmed Mitsubishi applications. The Four Seasons 20975 is built for pressure-switch replacement where accurate HVAC system control is required.