Four Seasons 35993 HVAC Binary Switch

Four Seasons 35993 Pressure Switch Overview

The Four Seasons 35993 pressure switch is a system-mounted HVAC binary switch built for Honda and Acura air conditioning systems that use an 11mm x 1.00 male thread connection. It monitors refrigerant pressure and helps the A/C system respond at the correct pressure range for stable operation. This Four Seasons Pressure Switch is a direct-fit service part for a wide range of Honda Accord, Civic, CR-V, Pilot, and Acura applications.

Key Features

• Binary HVAC pressure switch with open/closed operation
• System-mounted design with round male connector
• 11mm x 1.00 male fitting thread size
• 2-terminal electrical connection
• Steel construction with white connector housing
• Operate pressure range: 32 psi low off, 38 psi low on
• Meets or exceeds OEM requirements

Detailed Product Description

Four Seasons 35993 is an HVAC binary pressure switch used to monitor system pressure and signal the A/C circuit when pressure reaches the specified threshold. The switch is built with a round male connector, two terminals, and a steel body for system-mounted installation. As a pressure switch in the Four Seasons Pressure Switch line, it is engineered for vehicles that require an 11mm x 1.00 threaded connection and binary pressure control.

Fits 1994-2009 Honda Accord, N/A; fits 1994-2005 Honda Civic, N/A; fits 1997-2006 Honda CR-V, N/A; fits 2003-2008 Honda Pilot, N/A; fits 2004-2008 Acura TSX, N/A. This part cross-references Gates 20945 and UAC SW10000C for the same application. The part number 35993 is also commonly searched for Honda and Acura HVAC pressure switch replacement needs.

Common Problems This Part Can Address

• A/C compressor cycling at the wrong pressure
• HVAC system shutting off due to pressure-related switch faults
• Intermittent air conditioning engagement
• Pressure switch electrical connection issues
• Loss of proper refrigerant pressure signal to the A/C control circuit

Installation Notes and Tips

Verify the connector shape, terminal count, and 11mm x 1.00 thread size before installation. Confirm the vehicle uses a system-mounted binary pressure switch and compare the original switch to the replacement part number 35993. Inspect the connector and surrounding HVAC components for corrosion, damaged wiring, or refrigerant leaks before completing the repair.

Quality Assurance

Four Seasons lists this pressure switch as meeting or exceeding OEM requirements, making it a direct replacement option for service work on Honda and Acura HVAC systems. The Four Seasons 35993 is built to match the specified pressure range and electrical configuration used in the listed applications.