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