and 810HE series

ensuring the system operates within established safety parameters without nuisance tripping or delayed response times

leak-free seal required for high-demand heating environments

For technicians servicing these units

Field Controls 46086403 Switch 320788-703 and 810HE seriesThe Field Controls 46086403 Switch is a critical safety component designed for precise thermal monitoring in HVAC ventilation systems. This high limit safety switch features an auto reset mechanism calibrated to trigger at 160F, ensuring consistent protection for millivolt (mV) and 24V control circuits. Built for durability in commercial and residential draft control assemblies, it effectively prevents equipment damage by interrupting the circuit when