Lennox 25W26 TXV L99H008 The McDonnell & Miller FS4-3S

The McDonnell & Miller FS4-3S (Part Number 114641) is a rugged general purpose liquid flow switch specifically engineered for high-demand hydronic and industrial applications

Using a blade with a different pitch than the original specification can overload the motor or reduce airflow

Compatible with a wide range of energy-efficient ECM motors via standard PWM control signal input

This 24v gas valve operates at a standard 3

Lennox 25W26 TXV L99H008 The McDonnell & Miller FS4-3SThe Lennox 25W26 TXV is a critical OEM replacement component designed for 4 ton R22 air conditioning systems. Engineered for precision refrigerant metering, this thermostatic expansion valve features 3 8 x 1 2 ODF connections and a 30 inch capillary tube to ensure accurate superheat control across varying thermal loads. For a service technician, replacing a restricted or failed valve with this factory authorized Lennox 25W26 is essential to restoring