Painless Performance Electric Relay - Dual Action CoolingFanPosted in How To on August 1, 2009
A critical component of your engine's support accessories is the cooling system. Gone are the days of a manual belt-driven radiator cooling fan as we have ushered in the more powerful electric fan. Electric fans have been become more popular in recent years due to the fact that they come in a multitude of sizes and capacities. They can be controlled in as many ways and in most cases they are very energy efficient. Fan relays are a critical part of a fan's efficiency because a fan can only run as fast as the amount of power provided to it.
Air conditioning also plays a big part in the cooling of the engine and the cooling of the cabin. The fan needs to run when the engine is at operating temperature as well as when the A/C compressor is in operation. These two instances may not be at the same time. Painless Performance has developed a new fan relay that will allow the fan to operate at a preset engine temperature as well as when the A/C compressor is turned on. This design will allow maximum cooling efficiency of the engine and A/C system. If you don't have A/C, you could also use this second trigger for a manual "On" switch.