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The fans will always come on when you turn on the ac. It sounds like your coolant temp sensor is bad. Do you have a check engine light on? Your temp sensor maybe tied into your temp sending unit (which tells your heat gauge how hot the coolant is.) You could also just have some air in the system. I would burp the system first. If your problem persists, use a multimeter to check the in and out voltage on the sensor. You should also use a scan tool to see what temp the computer sees compared to what the temp of the coolant actually is. If your car has the 2.5 liter you may want to take it to a shop and have them do a cooling system pressure test. Those engines are known for leaking water pumps (a leaking coolant system will lower the boiling point of coolant intern causing a boil over.)
see if this helps.If the fans work with ac.Then relays and wiring
good.Unplug the coolant temp sensor connector.bridge the connector
with a small paper clip or wire.see if the fan runs.If it does replace
the coolant temp sensor.Check that your coolant is full before replacement.http://www.ericthecarguy.com/faq/what-to-do-when-your-engine-overheats
just bought the car. looks like the coolant temp sensor and water pump is new have receipts from last owner, i’ll try to disconnect sensor and test it. i put 1000 miles on car. i don’t think there’s air in system.
The first step with any overheat is to check for air in the cooling system. ESPECIALLY if someone just serviced or opened up the cooling system.
http://www.ericthecarguy.com/faq/what-to-do-when-your-engine-overheats
replaced coolant sensor, temp gauge reads o little higher and fans come on. happiness is. i like to thank everyone who replied to me with advise
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