Pressure Switch 20779171 – Alltrux ATX910-1122

The Alltrux ATX910-1122 Pressure Switch replaces Mack OEM 20779171 and is designed as a service replacement for heavy-duty truck HVAC and pressure control systems. This pressure switch monitors system pressure conditions and helps regulate compressor or circuit operation to maintain safe and reliable climate control performance in fleet and vocational environments. Pressure switches play a critical role in HVAC and related vehicle systems by ensuring components operate only within proper pressure ranges. As original switches wear electrically, develop internal faults, or lose calibration, inaccurate pressure control and reduced system efficiency can occur. Replacing worn pressure switches helps restore proper pressure regulation, improve component protection, and reduce unplanned service events. KEY FEATURES • Designed for heavy-duty truck HVAC and pressure monitoring applications • Helps regulate compressor or circuit operation based on system pressure conditions • Supports reliable system protection and consistent climate control performance • Durable construction suited for fleet, vocational, and on-highway use • Brand: Mack • Verify compatibility and application requirements before ordering TECHNICAL SPECIFICATIONS Alltrux Part Number: ATX910-1122 OEM Reference: 20779171 Product Type: HVAC Pressure Switch Brand: Mack System Application: Heavy-Duty Truck HVAC & Pressure Control Systems CROSS REFERENCES 20779171, 40PS48-1, 1MR2469M Note: Confirm OEM reference and application details before ordering to ensure proper fit and system compatibility.