The Alltrux ATX922-1211 Binary A/C Pressure Switch replaces OEM 1MR-3550M and is designed as a service replacement for heavy-duty truck HVAC and air conditioning systems. This binary pressure switch monitors refrigerant system pressure and helps protect the compressor and related components by cycling the system on or off when pressure thresholds are reached, supporting reliable climate control performance in fleet and vocational environments. Binary A/C pressure switches play a critical role in HVAC system protection by preventing compressor operation under unsafe low or high pressure conditions. As original switches wear electrically, develop internal faults, or lose calibration, HVAC performance and compressor reliability can be affected. Replacing worn binary switches helps restore proper pressure monitoring, improve system safety, and reduce unplanned HVAC service events. KEY FEATURES• Designed for heavy-duty truck HVAC and air conditioning pressure monitoring applications• Binary pressure switch helps protect compressor from low and high pressure conditions• Supports reliable A/C system operation and component protection• Durable construction suited for fleet, vocational, and on-highway use• Brand: Volvo• Verify compatibility and application requirements before ordering TECHNICAL SPECIFICATIONSAlltrux Part Number: ATX922-1211OEM Reference: 1MR-3550MProduct Type: Binary A/C Pressure SwitchBrand: VolvoSystem Application: Heavy-Duty Truck HVAC & Air Conditioning System CROSS REFERENCES1MR-3550M Note: Confirm OEM reference and application details before ordering to ensure proper fit and HVAC system compatibility.
