Reznor 43594 Flame Sensor 326010-701 making it the standard choice

making it the standard choice for contractors troubleshooting restricted flow or erratic suction pressures

this Bard replacement control board features a 24V input circuit and high-amperage relay outputs to handle the inductive load of constant-torque motors or multi-speed PSC blowers

For the 3/4" (20 mm) stroke "A" models

Robust Construction: The forged brass housing provides superior pressure ratings and corrosion resistance compared to cast alternatives

Fixed Setpoints: Pre-calibrated 35°F open and 58°F close logic eliminates the need for field adjustments and ensures consistent thermal protection

Reznor 43594 Flame Sensor 326010-701 making it the standard choiceThe Reznor 43594 Flame Sensor is a critical safety component designed for precise flame rectification in high performance heating equipment. As an authentic OEM Reznor part, it ensures the ignition module receives a consistent microamp signal (typically between 3 to 10 A), preventing the short cycling or lockout issues common with worn or carbon fouled sensors. Engineered to withstand the intense thermal stress of gas fired unit heaters, this sensor