Fans on Cirrus 2.5 1995 start at any time they want!
The fans are going ON at any time- even when you start the engine, even if the engine is cold! But they arn't working stable- they working for few seconds and going OFF, and after that immediately going ON again, and repeat this chaotic in time. My temperature gauge is working fine and very accurately. I know that the computer is controling when the fans need to start, based on the readings of the temperature sensor connected to my temperature gauge. So I don't think that it can be a bad sensor.
Any ideas?? I have this problem for a year now and I could not find any solution. I really really appreciate your help!!!
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Re: Fans on Cirrus 2.5 1995 start at any time they want!
THERE IS A THERMOSTATIC SENSOR THAT SENSES COOLANT TEMP. IF THE AC OR THE DEFROSTER IS USED THE FAN WILL COME ON BECAUSE THE SYSTEM UTILIZES THE AC COMPRESSOR WHICH CAUSE THE FAN TO COME ON AND CYCLE. THE FAN MAY EVEN RUN FOR A PERIOD OF TIME AFTER YOU SHUT THE ENGINE OFF. THIS IS A NORMAL PROCESS. JUST MAKE SURE YOU HAVE A GOOD BATTERY IN YOUR VEHICLE.
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you could have several possibilies here they are could be a bad throttle position sensor,poor car battery(not enough power when cold) to supply all systems,bad cam or crank sensor when cold as (temperature changes resistant in wires),bad fuel pump (sticks when cold indicating worn pump),poor engine maintenance such as tuneup,can even be a bad computer that is affected by the cold,even bad starter contacts that can draw excessive voltage from the rest of the system
you could check the temp/fan sensor.but when you say cold do you mean first start of day??cos if the head has hot water in it over a set temp then the fan will start but will go off when cooler.stops hotspots...
Check to see if the radiator fan relay has gone bad and needs to be replaced. Once you located the relay, (in the fuse box under the hood) Try swapping it out with another relay and see if the fans stop, if the fans stop working with the swapped relay, replace the relay. It's know for the relays when they go bad to stick and will have a close loop. Good luck and hope this helps. Keep me posted, be glad to help you get your car running 100% again soon.
If the fans didn't run any further the engine continues to warm and possible seizure will occur. This is also the reason you will probably go through batteries in the long run. Hopefully this helps the issue you are having.
There are 2 things that will cause this to happen. 1. The thermostat needs to be replaced and, 2. The coolant sensor can be bad. When I had this problem, I changed them both at the same time, she been just fine since then. Also, I had the check engine light on, and got the code from AutoZone (it's free!)