or the furnace short cycling—shutting down shortly after ignition before reaching the thermostat setpoint

For specific chemical compatibility with the brass body and Buna-N O-ring

This assembly is specifically designed for the units listed in the York technical literature that utilize the 373-39596-001 or 373-27820-201 part numbers

Accurate gas water heater repair often requires this specific 100109617 component to meet original equipment manufacturer tolerances

ensuring reliability under pressure surges

Cleveland Controls NS2-1239-00 Pressure Switch L99H008 or the furnace short cycling—shuttingThe Cleveland Controls NS2 1239 00 is an industrial grade air flow pressure sensing switch specifically designed to monitor positive, negative, or differential air pressure in HVAC systems. This fixed set point pressure switch is factory calibrated at . 70" w. c. (inches water column), ensuring high accuracy for critical safety applications such as proving fan flow or detecting filter blockage. Built with a glass filled polycarbonate housing and a