The Broan S82229000 Heater Power Unit Assembly provides electrical power management for the heating system. This assembly contains the electrical components responsible for supplying and regulating power to the connected heater elements during operation. It works within the appliance's heating system to support the required electrical supply and coordinate heater operation. Installed ... https://www.hnkparts.com/broan-s82229000-power-unit-assembly-9425-obe105854-77675/4-S82229000.html