the MARS 39004 senses the temperature of the water in the supply line

sluggish opening/closing cycles

Maintain the peak efficiency of your hydronic system with the Taco 008-044RP Cartridge Assembly

Common Questions: What are the signs of a failing 75 amp contactor

York S1-VLV-0025 Expansion Valve 320788-702 the MARS 39004 senses theThe York S1 VLV 0025 Expansion Valve is a high performance Alco thermostatic expansion valve designed for precise refrigerant metering in residential and commercial split systems. Built with 3 8 x 1 2 ODF connections, this TXV valve replacement ensures optimal evaporator superheat control, preventing liquid slugging and maximizing compressor longevity. The thermal expansion valve features a robust balanced port design that maintains pressure stability