High Pressure A/C Switch 3521729C1 (N.C.) – Alltrux ATX917-1114

The Alltrux ATX917-1114 High Pressure A/C Switch replaces OEM 3521729C1 and is designed as a service replacement for heavy-duty truck HVAC and air conditioning systems. This normally closed (N.C.) high pressure switch monitors refrigerant system pressure and helps protect the compressor and related components by interrupting operation when pressure exceeds safe limits, supporting reliable climate control performance in fleet and vocational environments. High pressure switches play a critical role in HVAC system protection by preventing compressor damage caused by excessive refrigerant pressure. As original switches wear electrically, lose calibration, or develop internal faults, inaccurate pressure monitoring and reduced HVAC reliability can occur. Replacing worn high pressure switches helps restore proper pressure protection, improve system safety, and reduce unplanned HVAC service events. KEY FEATURES • Designed for heavy-duty truck HVAC refrigerant pressure protection applications • Normally closed (N.C.) high pressure switch helps protect compressor from overpressure conditions • Supports reliable A/C system operation and component protection • Durable construction suited for fleet, vocational, and on-highway use • Brand: International • Verify compatibility and application requirements before ordering TECHNICAL SPECIFICATIONS Alltrux Part Number: ATX917-1114 OEM Reference: 3521729C1 Product Type: High Pressure A/C Switch (Normally Closed) Brand: International System Application: Heavy-Duty Truck HVAC & Air Conditioning System CROSS REFERENCES 3521729C1 Note: Confirm OEM reference and application details before ordering to ensure proper fit and HVAC system compatibility