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You are watching: Radiator fan turns on when car starts


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I"ve just owned mine 2008 Elise SC for a week, but already I"m see something odd: the radiator fan starts up immediately on engine begin -even very first thing in the morning when the engine has been sitting every night and the ambient temp is no more than 65 levels F. Ns swear the did not perform this because that the first several days ns owned the car.This isn"t normal, right? What deserve to I perform to isolation the failure? I"m thinking it"s one of two people a fan relay or a thermostat.FWIW, the engine does ultimately warm increase (= temp screens in LCD panel). I"ve even seen the temp crawl up to 201 degrees.
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Don t recognize exactly, however many cars practice the a/c for a quick time ~ above startup to keep the compressor seals in good shape.Sam
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I check out the post and also the trouble was resolved by instead of the "trinary switch"? The coolant temp sensors on British car is referred to as the "Otter switch" which as soon as the coolant reaches collection temp the coil closes and also sends power to pilgrimage the fan relay and also make the pan come on.Someone asked the poster what the "trinary switch" was and there was no reply.If the relay fill is located inside the fender well the relays might have shorted the end from water contact. I suggest acquiring a wiring schematic and also going v the system. Correct it"s a royal pain yet cheaper the throwing components at it. Ns think it might be either a shorted otter move or fan relay. Sir Lotus claimed it was a ECU problem, no saying he"s wrong however with mine time spent on the present I never ever saw a ECU review coolant temps, the was constantly a sensor that told it what to do.