this unit utilizes a 3-try ignition sequence with a 15-second inter-purge

Flexible Terminal Design: Equipped with large box lugs for high-gauge wire and dual quick connects for control circuit speed

this is the official updated part number and serves as a direct drop-in replacement for the 100166151 air pressure switch

It utilizes precise timing circuits to allow for pressure stabilization during startup

Resideo WT8840B1500 Gas Valve 321894-706 this unit utilizes a 3-tryThe Resideo WT8840B1500 Gas Valve is a professional grade standing pilot water heater control designed to replace legacy WV8840 series valves. Built for high performance Natural Gas applications, this control is a direct fit for AO Smith and Bradford White water heaters. It features a 1 2" NPT inlet and a 1 2" Inverted Flare outlet, and it is engineered for tanks with a 2" insulation cavity. The integrated NTC temperature sensor provides precise