Four Seasons 20957 A/C Clutch Cycle Switch

Four Seasons 20957 A/C Clutch Cycle Switch

The Four Seasons Pressure Switch 20957 is a system-mount A/C clutch cycle switch built for 12-volt HVAC systems. It uses a female M12 x 1.50 fitting, 2-pin male terminals, and a cycling pressure design to help regulate compressor operation in the air conditioning circuit.

Built with plastic and metal construction and a weather pack connection, this pressure switch meets or exceeds OEM requirements. The orange switch includes Four Seasons brand line pressure switch 24676 and is intended for direct replacement service on select Ford, Mercury, and Lincoln applications.

Key Features

• Four Seasons Pressure Switch part number 20957
• A/C clutch cycle switch with cycling pressure operation
• System mount design with female M12 x 1.50 thread
• 2-terminal, male pin electrical connection
• 12-volt HVAC switch with weather pack protection
• Plastic and metal construction
• Meets or exceeds OEM specifications

Product Details

This Four Seasons 20957 pressure switch is used in HVAC systems that cycle the A/C compressor based on refrigerant pressure. It is a direct-fit style pressure switch for select vehicles including the 2006 Ford Crown Victoria, 2003-2006 Mercury Grand Marquis, and 2003-2004 Ford Grand Marquis. It also fits select Lincoln Town Car and Ford GT applications listed in the fitment data. This part cross-references UAC SW11156C for the same application.

Common Issues This Part Can Address

• A/C compressor cycling too frequently or not cycling correctly
• HVAC pressure signal interruption at the switch
• Faulty pressure switch electrical connection
• Inconsistent compressor engagement in the air conditioning system
• Pressure switch replacement needs on select Ford, Mercury, and Lincoln models

Installation Notes and Tips

Verify the thread size, terminal style, and connector layout before installation. Confirm system pressure and inspect the HVAC circuit for related wiring or connector damage before replacing the switch. For fitment-based service, use the vehicle listing exactly as shown: Fits 2006 Ford Crown Victoria, N/A; Fits 2003-2006 Mercury Grand Marquis, N/A; Fits 2003-2004 Ford Grand Marquis, N/A; Fits 2003-2004 Lincoln Town Car, N/A; Fits 2005-2006 Ford GT, N/A.

Quality Assurance

Four Seasons 20957 is engineered to meet or exceed OEM requirements for pressure switch service. The part line is built for HVAC replacement applications where accurate pressure-based compressor cycling is required.