Lennox 65W84 Switch 319825-402 Serviceable Design: Modular approach allows

Serviceable Design: Modular approach allows for easy replacement of internal components without removing the entire body

supporting a maximum static pressure of 400 psi and a close-off pressure of 30 psi

This Johnson Controls pneumatic thermostat is sold as the internal mechanism only

A critical field-proven feature is the integrated hard start feature

replacing with an OEM 311213-403 restores factory-spec durability

Lennox 65W84 Switch 319825-402 Serviceable Design: Modular approach allowsThe Lennox 65W84 Thermostat Switch Freezestat is a critical safety component designed for freeze protection in residential and commercial HVAC applications. As a genuine OEM Lennox replacement part, this SPST (Single Pole Single Throw) switch monitors evaporator coil temperatures to prevent ice accumulation and potential compressor damage. Engineered for precision, the 65W84 activates by opening the circuit at 29F to interrupt cooling and closes at