AERCO Boiler and Water Heater 27128-2 Pressure Switch Kit 323269-701 this thermostatic expansion valve (TXV)

this thermostatic expansion valve (TXV) adjusts refrigerant flow based on real-time evaporator load

By absorbing the startup torque and steady-state oscillation of the motor

If you are diagnosing a furnace pressure switch failure

preventing flow until 12V AC power is applied to the solenoid coil

AERCO Boiler and Water Heater 27128-2 Pressure Switch Kit 323269-701 this thermostatic expansion valve (TXV)The AERCO 27128 2 gas pressure switch kit is designed for reliable monitoring and control of fuel gas pressure in AERCO boiler and water heater systems. This gas pressure switch kit ensures proper burner operation by verifying adequate gas supply before ignition, helping prevent unsafe firing conditions. Built for integration with AERCO combustion control systems, this boiler pressure switch is commonly used in commercial hydronic heating and domestic