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Always cross-reference the Lennox 17F24 specifications with your unit's serial number through a parts manual or the LennoxPros portal
Engineered as a high-limit safety device
Common indicators include a high-pitched screeching from worn bearings
the internal contacts may be damaged
Resideo ZD8X28TZ Damper R-448A Always cross-reference the Lennox 17F24The Resideo ZD8X28TZ Damper is a precision engineered 8" Wide X 28" High Parallel Blade Zone Damper designed for high performance airflow management in heavy duty HVACR applications. Built with a solid extruded aluminum frame and parallel blades, this unit ensures a low leakage performance and structural rigidity required for high static pressure systems. The damper utilizes a reliable 24Vac synchronous motor mounted on the 28" side, operating as a
