Global Parts 1711374 A/C Trinary Switch

A/C Trinary Switch for HVAC Control

Global Parts 1711374 is an A/C trinary switch used in automotive HVAC systems to provide pressure feedback to the engine management system. On modern vehicles, the ECM uses this signal to manage A/C operation; on earlier systems, it can directly shut the compressor off to help prevent compressor damage.

• Type: Trinary normal open
• 7/16"-20 female connection
• High-pressure opening point: 455 psi
• Low-pressure opening point: 17 psi
• Fan normal operating point
• Fan close point: 228 psi

Fitment and Cross Reference

Compatible with select Audi A3 Sportback e-tron, Audi TT, Audi TT Quattro, Volkswagen EuroVan, Volkswagen Golf, and Volkswagen Jetta applications. Fits 2016-2017 Audi A3 Sportback e-tron, N/A; Fits 2000 Audi TT, N/A; Fits 2000 Audi TT Quattro, N/A; Fits 1997 and 1999-2003 Volkswagen EuroVan, N/A; Fits 1990-1999 Volkswagen Golf, N/A; Fits 1990-1999 Volkswagen Jetta, N/A. This part cross-references Four Seasons 36499 for the same application. Part number 1711374 also cross-references UAC SW9600C.

What It Is Used For

• Loss of A/C compressor cutout protection from abnormal refrigerant pressure
• Incorrect condenser fan activation during A/C operation
• Intermittent compressor cycling caused by pressure-switch signal issues
• A/C system shutdown triggered by a failed pressure input to the ECM
• HVAC performance problems on Audi and Volkswagen vehicles listed above

Installation Notes and Tips

Verify the connector style, thread size, and pressure settings before installation. Confirm the vehicle’s A/C control strategy and compare the original switch to part number 1711374 to ensure the correct application for your Audi or Volkswagen model.

Quality Assurance

Global Parts supplies this switch as an OE-style HVAC electrical component for pressure-based A/C control and compressor protection.