The Russell 103079-09 is a 2-wire fan delay switch designed to provide a controlled shutdown for fans after the associated equipment has been turned off. This prevents sudden temperature fluctuations and extends the life of the equipment. It features 15" leads for easy installation and is compatible with a variety of Russell and other brand equipment. By incorporating this delay, the ... https://partsfe.com/103079-09-russell-switchfan-delay-2-wire