Four Seasons 35901 HVAC Pressure Switch

Brand Four Seasons 35901
Voltage 12
Connector Shape Open
Comp Open/Closed Open
Description System mounted trinary pressure switch
Fan Open/Closed Open
Fitting Gender Female
Fitting Thread Size 7/16" x 20
Item Included A Desc 24650
Item Included A Qty. 1
Material Metal
Meets / Exceeds OEM? Yes
Mnt Sys Loc System mounted
Number of Terminals 4
Style Pressure
Type Trinary
Weather Pack? No
Fits —

OE direct replacement. Meets or exceeds OEM requirements for dependable HVAC control.

Trinary pressure switch. Combines multiple functions in one compact pressure control component.

Metal construction. Durable housing with a 4-terminal open connector design.

Cross-references Bosch BC1005, Four Seasons 35901 and Gates 1560 for the same application. See all 73.

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Four Seasons 35901 Trinary Pressure Switch

The Four Seasons Pressure Switch 35901 is a system-mounted trinary HVAC pressure switch built for 12-volt automotive air conditioning systems. It uses a 4-terminal, open connector design with a female 7/16" x 20 fitting and metal construction for direct replacement service.

Four Seasons Pressure Switch line components are built for HVAC control applications where accurate pressure signaling is needed for compressor and fan operation. This trinary pressure switch meets or exceeds OEM requirements and is a practical choice for service work on vehicles such as Honda Civic and Toyota Corolla when the original pressure switch needs replacement.

Key Features

  • Part number: 35901
  • System-mounted trinary pressure switch for HVAC pressure control
  • 12-volt electrical design
  • 4-terminal open connector configuration
  • Female fitting with 7/16" x 20 thread size
  • Metal housing construction
  • Meets or exceeds OEM requirements
  • Open compressor and fan switch states

Detailed Description

Four Seasons 35901 is an HVAC pressure switch used to monitor refrigerant system pressure and relay the proper signal to the compressor and cooling fan circuits. The trinary design combines pressure-based control functions in one system-mounted component, helping maintain correct HVAC operation in vehicles that use this style of switch. Cross-reference part numbers include Bosch BC1005 and Gates 1560 for the same application.

For buyers searching by vehicle keywords, this part is commonly referenced in HVAC repair searches for Honda Civic and Toyota Corolla air conditioning pressure switch replacement. If your vehicle uses a system-mounted trinary pressure switch with a 7/16" x 20 female fitting, Four Seasons 35901 is the direct part number to verify.

Common Problems This Part Addresses

  • Compressor cycling issues caused by a faulty pressure switch
  • Cooling fan control faults tied to HVAC pressure signaling
  • Air conditioning system shutdown from incorrect pressure input
  • Intermittent HVAC operation from worn electrical contacts
  • Replacement needs after corrosion or connector damage

Installation Notes and Tips

Verify the connector shape, terminal count, fitting thread size, and system-mounted location before installation. Confirm the vehicle uses a trinary pressure switch with a female 7/16" x 20 connection and 12-volt electrical system. Match the original HVAC switch style and compare the old unit to Four Seasons 35901 before final assembly.

Quality Assurance

This Four Seasons HVAC pressure switch meets or exceeds OEM requirements for replacement service. Part number 35901 is built as a direct-fit pressure switch for applications that use this trinary configuration.

This part fits 0 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelPositionNotes
Directly replaces or cross-references 73 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Bosch — BC1005Four Seasons — 35901Gates — 1560Global Parts Distributors LLC — 1711641Hygrade Tuneup — 1550Quality-Built — 15671SKF —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