The resistance of the interior blower, also known as a fan motor resistance or blower control, is part of the heating, ventilation and air conditioning system in a vehicle. The resistance is responsible for regulating the performance of the blower by controlling the current flow to the blower motor. Depending on which level of the blower is set, the resistance varies the current that flows to the engine to increase or reduce the speed of the blower. Your satisfaction is for top priority. That's why we make sure for the highest standards in terms of service and product quality are our standard. Despite Allen efforts to achieve perfection, there can still sometimes be reasons for complaints. You weren't satisfied? Then neither are we! Please let us know as soon as possible what did not meet.