Four Seasons 37311 HVAC Cut-Off Switch

Four Seasons 37311 Low Cut-Out Pressure Switch

The Four Seasons Pressure Switch 37311 is a system-mounted HVAC cut-off switch built for low-pressure A/C protection. It uses a gray plastic and metal body with a round male connector, 2 terminals, and an M12 x 1.50 female thread for direct system mounting.

Four Seasons Pressure Switch products are built for service replacement in automotive air conditioning systems. This Four Seasons 37311 switch follows the low cut-out pressure style used to monitor refrigerant pressure and help control compressor operation in the HVAC circuit.

Key Features

• Low cut-out HVAC pressure switch for system-mounted applications
• Gray plastic and metal construction
• Round male connector with 2 terminals
• Female M12 x 1.50 threaded fitting
• Harness connector reference: 37227
• Meets or exceeds OEM requirements
• Direct replacement for Four Seasons 37311

Detailed Description

This HVAC cut-off switch is designed for low-pressure A/C system monitoring in vehicles that use a system-mounted pressure switch. The open compressor state, round connector design, and threaded female fitting support a direct service replacement for the original pressure switch location. It is a practical choice when replacing a worn or failed pressure switch on Chevrolet Camaro, Pontiac Firebird, Chevrolet P30, and GMC P3500 applications listed below. The Four Seasons 37311 part number is also referenced in interchange listings for cross-application lookup.

This part cross-references Hygrade Tuneup 1453 for the same application.

Vehicle Fitment

• Fits 1993-1998 Chevrolet Camaro, Low Pressure A/C System Mounted; Suction Line; Pressure Switch
• Fits 1996-1998 Chevrolet P30, Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
• Fits 1996-1998 GMC P3500, Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch
• Fits 1993-1998 Pontiac Firebird, Mount the Low Pressure A/C Cut-Off Switch on the HVAC system.; Pressure Switch

Common Repair Uses

• Restoring A/C compressor cut-off function after pressure switch failure
• Addressing intermittent compressor cycling in low-pressure HVAC circuits
• Replacing a damaged or corroded system-mounted pressure switch
• Correcting A/C shutdown caused by an open low-pressure switch circuit
• Servicing Chevrolet Camaro and Pontiac Firebird HVAC pressure switch applications

Installation Notes and Tips

Install the switch at the system-mounted location specified for the vehicle’s HVAC circuit. Verify the connector style, thread size, and harness connector reference before installation. Confirm refrigerant system condition and inspect the suction line or mounting point for wear, contamination, or thread damage before installing the replacement Four Seasons 37311 pressure switch.

Quality Assurance

This Four Seasons HVAC cut-off switch meets or exceeds OEM requirements for the listed applications. Use it as a direct replacement when the original low-pressure switch no longer operates correctly in the A/C control circuit.