Have a 1997 Geo Prizm LSI (basically a Toyota Corolla) with the 1.8l engine. Recently the fan has started to stay on all the time. I can start the car cold in the morning and the fan automatically goes on and stays on, never shuts off. There are actually two fans but only one fan is going on and staying on. Other one only seems to kick on when engine is hot.
Any ideas on what would cause this and how to fix it?