Lochinvar & A.O. Smith 100113144 Switch 321042-401 allowing for field-calibrated setpoints that

allowing for field-calibrated setpoints that optimize chiller efficiency and prevent low head pressure issues during low ambient operations

this 1-inch assembly enables an infinite 4:1 turndown ratio to accurately track heating loads and eliminate temperature overshooting

This 70W heater is a direct technical substitute for legacy part numbers 02-3653-02S

Broad Compatibility: Direct cross-reference for numerous OEM parts and replaces standard 48-frame condenser motors

Durable Construction: Engineered to withstand high combustion chamber temperatures and resist thermal fatigue

Lochinvar & A.O. Smith 100113144 Switch 321042-401 allowing for field-calibrated setpoints thatThe Lochinvar & A. O. Smith 100113144 Blower Prover Switch is a critical safety component designed for high efficiency water heaters and commercial boilers. As a direct OEM replacement for NS2 1333 01, this pressure switch (often referred to as an air pressure switch or draft prover switch) monitors the differential pressure created by the inducer motor. By verifying stable airflow, it ensures the sequence of operation proceeds to ignition safely.