Four Seasons 35829 HVAC Binary Switch

Pressure Switch for Toyota, Isuzu, Honda and Lexus

Four Seasons Pressure Switch 35829 is a system-mounted HVAC binary pressure switch built for pressure monitoring in the air conditioning circuit. It uses a black, open connector design with 2 terminals and a male 3/8 in. x 24 thread fitting for direct replacement service on supported Toyota, Isuzu, Honda, and Lexus applications.

Four Seasons Pressure Switch line components are used in HVAC service where accurate pressure signaling is needed to help the system respond properly to refrigerant pressure conditions. Part number 35829 meets or exceeds OEM requirements and is listed for a range of import vehicles, including Toyota 4Runner, Toyota Pickup, Toyota Supra, Toyota Corolla, Toyota Land Cruiser, Toyota MR2, Toyota Van, Honda Civic, Honda Accord, Honda Prelude, Isuzu Rodeo, Isuzu Amigo, Isuzu Trooper, and Lexus ES250.

• Binary HVAC pressure switch with open/closed operation
• System-mounted design for factory-style replacement
• Black housing with open connector shape
• 2-terminal electrical connection
• Male fitting with 3/8 in. x 24 thread size
• Meets or exceeds OEM specifications

Vehicle Fitment

• Fits 1989-1994 Toyota 4Runner, Pressure Switch
• Fits 1988-1994 Toyota Pickup, Pressure Switch
• Fits 1993 Isuzu Rodeo, Pressure Switch
• Fits 1991 Isuzu Rodeo, Pressure Switch
• Fits 1989-1992 Isuzu Amigo, Pressure Switch
• Fits 1992 Isuzu Pickup, To 9/92; Pressure Switch
• Fits 1986-1992 Toyota Supra, Pressure Switch
• Fits 1988-1991 Isuzu Pickup, Pressure Switch
• Fits 1989-1991 Isuzu Trooper, Pressure Switch
• Fits 1990-1991 Lexus ES250, Pressure Switch
• Fits 1988-1990 Toyota Corolla, Pressure Switch
• Fits 1986-1989 Toyota Land Cruiser, Pressure Switch
• Fits 1986-1989 Toyota MR2, Pressure Switch
• Fits 1988 Toyota Tercel, Pressure Switch
• Fits 1984-1988 Toyota Van, Pressure Switch
• Fits 1985-1987 Honda Civic, Pressure Switch
• Fits 1985-1987 Honda Prelude, Pressure Switch
• Fits 1986 Toyota Celica, Pressure Switch
• Fits 1985 Honda Accord, Pressure Switch

What This Switch Helps Address

• Air conditioning compressor cycling problems caused by incorrect pressure signaling
• HVAC system shutdowns related to pressure switch failure
• Intermittent A/C operation on older Toyota, Isuzu, Honda, and Lexus vehicles
• Faulty pressure input to the HVAC control circuit
• Replacement needs during A/C service on system-mounted switch applications

Installation Notes and Tips

Confirm the connector style, 2-terminal layout, and 3/8 in. x 24 male thread before installation. This part cross-references UAC SW9066C and Four Seasons 57092 for the same application. Verify the vehicle build date and application notes, especially for 1992 Isuzu Pickup models listed to 9/92. Use proper HVAC service procedures and check the system for correct refrigerant pressure before final testing.

Quality Assurance

Four Seasons 35829 is identified as meeting or exceeding OEM requirements for the listed applications. The part number 35829 is used across multiple import HVAC service references, supporting direct replacement selection for compatible Toyota 4Runner, Toyota Pickup, Honda Civic, and related models.