Precision Tuning: Includes a cutout knob adjustment for field-calibrating high and low limits without removing the cover

It is a direct fit for several Lennox G40DF and G50DF series furnaces

This component replaces the discontinued Weil McLain 512-200-075 burner

Will this switch work in other furnace brands

Chronic thermal stress can eventually weaken the internal bimetal disc

Zonefirst AOBD-12X12 Blade Damper Els PW 29614 Precision Tuning: Includes a cutoutThe Zonefirst AOBD 12X12 is a professional grade 12" x 12" automatic opposed blade damper designed to provide precise airflow management in commercial and residential HVAC zoning systems. Constructed from heavy duty extruded anodized aluminum, this damper features a low profile frame that allows for simple "slide in" installation through a standard 3 inch duct slot. Unlike parallel blade dampers, the opposed blade action provides a linear airflow