Lochinvar & A.O. Smith 100110589 Pressure Switch 321894-706 The Johnson Controls A25AN-1 is

The Johnson Controls A25AN-1 is a heavy-duty warm air limit control designed for high-limit protection in forced air heating systems

and Fire Magic equipment makes it a versatile HVAC service part for various gas-fired units

Key Benefits for Technicians Precise Calibration: Fixed 1

This externally equalized TXV features an internal check valve

as a standard mechanical limit switch

Lochinvar & A.O. Smith 100110589 Pressure Switch 321894-706 The Johnson Controls A25AN-1 isThe Lochinvar & A. O. Smith 100110589 Pressure Switch is a critical safety component designed for high efficiency boilers and water heaters. As a genuine OEM replacement part, this switch ensures the combustion air pressure and venting conditions meet precise operational parameters before allowing the ignition sequence to proceed. It effectively monitors the inducer draft, preventing the system from firing under hazardous conditions such as blocked