Fan Controls

Fan controls help HVAC and ventilation professionals manage blower and fan operation, temperature limits, switching, and related system functions. This category includes components used in forced-air heating systems, gas warm-air appliances, and fan-control installations, as well as replacement solutions for selected ECM-to-PSC blower motor conversions.

Choose fan controls by the function required in the installation. Fan and limit controllers combine fan management with high-limit protection, while fixed manual-reset limit controls are available with 125°F, 165°F, 200°F, or 240°F settings and 3-inch insertion lengths; an 8-inch surface-mount fan limit controller offers a 200°F high-limit stop. For fan center applications, compare the 40 VA SPDT and 50 VA DPDT switching options, along with component dimensions and included relay details. ECM replacement boards support compatible PSC motors up to 1 horsepower on 120 or 240 VAC single-phase power; select between a single-speed replacement setup and a variable-airflow board with three-speed connections. Also consider an electronic fan timer when adjustable heating and cooling delays, centralized wiring, diagnostics, and a replaceable fuse are needed. For controlled on/off valve applications, verify the required 24V operation, 3/4-inch sweat connection, auxiliary switch, and 5.8 Cv rating.

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