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Built with a rugged NEMA 2 housing and a mechanical position indicator
and 29mm width
Key Benefits Direct OEM Compatibility: Engineered to provide a precise match for part numbers HC39SL710
Always verify your existing blower wheel's rotation direction before finalizing the installation to ensure proper airflow through the ductwork
Can I use this on a boiler system
Marvair 20173A Defrost Control Board 328140-751 Built with a rugged NEMAThe Marvair 20173A Defrost Control Board is the essential HVAC replacement part designed specifically for Marvair heat pump systems requiring reliable defrost cycle management. As the direct replacement for the legacy 20173 board, this updated component integrates seamlessly into existing control panels to manage evaporator coil icing in low ambient conditions. For technicians performing heat pump troubleshooting, the 20173A provides precise timing