Tjernlund Products DC4 Draft Control 326010-701 Verify 24V power at the

Verify 24V power at the switch terminals and check the induction tubing for clogs or cracks

the latter is simply the updated SKU used in current Trane parts catalogues

it requires a weather shield for direct outdoor exposure

Field technicians rely on its consistent resistance-to-temperature curve to maintain strict environmental tolerances in commercial HVACR applications

For high-resistance fluids like pure distilled or DI water

Tjernlund Products DC4 Draft Control 326010-701 Verify 24V power at theThe 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,