If your technical manual calls for the 62909 series

For contractors managing HVAC repair parts

This assembly ensures optimal gas-to-air mixture ratios

It is primarily used for Reznor Model FT and Model SFT units during gas or ignition system conversions

Always cross-reference the Sporlan capacity chart and the color-coded white top before installation

MARS 33217 Sequencer Els PW 17895 If your technical manual callsThe MARS 33217 is a heavy duty 240V heat sequencer engineered for precise multi stage control in electric furnaces, heat pumps, and air handlers. Designed for veteran contractors, this thermal time delay relay features a DPST (Double Pole Single Throw) or SPDT (Single Pole Double Throw) switch action, allowing for the staggered activation of heating elements to prevent localized circuit overloads and nuisance tripping. Built with a solid state PTC