Pay in 4 interest-free payments of $10.57 Learn more
Ships within 48 hours · Estimated delivery Sep 11 - Sep 16
Duotone terrace — saffron brief on the left, garden-folded ledger on the right.
Common Questions What temperature is required to initiate the defrost cycle
the NBR seals and brass construction make it suitable for light oil applications
it effectively eliminates current shorting to improve overall heating system efficiency
any signs of thinning metal
or noisy hydraulic vibration
Lochinvar & A.O. Smith 100208378 Pressure Switch 321702-401 Common Questions What temperature isThe Lochinvar & A. O. Smith 100208378 Pressure Switch is a critical OEM safety component engineered for precise airflow monitoring in high efficiency boilers and water heating systems. This switch is factory calibrated to a 4. 10" WC (Water Column) set point, ensuring the inducer fan generates sufficient negative pressure for safe combustion. As a direct cross reference for part 100166100, it serves as a standard replacement for several Lochinvar