Enhanced System Stability: Maintains consistent evaporator superheat

The two-position (on/off) control logic is powered by a brushless DC motor with stall protection

worn races

provided the vent pipes are clear and the switch itself is functional

Does this assembly include the thermal limit switches

Tjernlund Products DC4 Draft Control 321894-706 Enhanced System Stability: Maintains consistentThe Tjernlund DC4 Draft Control is an essential component for technicians managing combustion efficiency in residential and commercial heating systems. This 4 inch single acting draft control is precision engineered to maintain a consistent neutral draft within chimneys and vents, effectively counteracting fluctuations caused by changing barometric pressure, stack temperatures, and wind velocity. Fabricated from heavy duty corrosion resistant steel,