How do I know if my HH18HA493 limit switch is bad

Reliable Water Control: The proportional feed mechanism gradually adds water to match system demand

Structural Rigidity: Constructed from high-grade galvanized steel to withstand constant blower vibration and thermal cycling

Universal Compatibility: Fits shafts from 1/2 inch to 1

8" WC setpoint switch is a Single Pole Double Throw (SPDT) configuration

Laars Heating Systems 20035402 Lead Pilot Assembly 321894-708 How do I know ifAs a seasoned technician, you know that a reliable ignition sequence is the backbone of any hydronic system. The Laars Heating Systems 20035402 Lead Pilot Assembly is a precision engineered OEM component designed specifically for intermittent ignition devices (IID) in high performance boilers like the Laars Series AP and Mighty Therm. This Honeywell sourced assembly provides the consistent spark and stable flame rectification needed to prevent