benlw Posted February 13, 2015 Share Posted February 13, 2015 Hi All, After a little advice. I believe that my engine cooling fan isn't coming on when the its getting warm. I've came to this conclusion from waiting in traffic on what was a cold day. The start of the day my outside air temp gauge suggested that it was about 8 degrees however after getting stuck in traffic after about 30 minutes i noticed that the temp gauge had gone up. i realise that this is likely going to be the case due to hot emissions from other cars etc but it reached 25 degrees. It was at this point that i decided that i was going to turn my aircon etc on to try and help with the cooling but the temperature still rose. What could be the problem ? and how can i tell if it really is a fan problem? Car in question is 2010 Fiesta 1.6 TDCi titanium Any help would be appreciated Quote Link to comment Share on other sites More sharing options...
E5GDM Posted February 16, 2015 Share Posted February 16, 2015 Your cooling water temp goes up due to the heat produced through the engine running (combustion), nothing to do with the emissions from other cars Not sure what temp the fan would kick in, but I reckon it'd be nearer 95 than 25. Quote Link to comment Share on other sites More sharing options...
Mariner Posted February 16, 2015 Share Posted February 16, 2015 This is a known issue. The outside temp sensor has nothing to do with engine temp. You will find as soon as you start moving the outside temp will drop to more like what it acually is outside. Its to do with the position of the temp sensor. When stationary the sensor is atificailly warmed by the engine, as soon as you start moving it goes back to normal. Quote Link to comment Share on other sites More sharing options...
E5GDM Posted February 16, 2015 Share Posted February 16, 2015 Either the original post was edited or I was still half asleep when I replied.....but as above the ambient tempature gauge has no control over the engine coolant fan. That is controlled by a sensor in the cooling system, & will trigger the fan at around 95 degrees C. Quote Link to comment Share on other sites More sharing options...
Abbie1994 Posted February 17, 2015 Share Posted February 17, 2015 My cars fan has stopped working as well , I have had a new fan fitted , new water pump and a new thermostat next on the list is a new tempature sensor my car is a 07 plate fiesta which at the moment stinks as its getting very hot but the temp gauge says half way :/ Please let me no if you find out the problem Quote Link to comment Share on other sites More sharing options...
iantt Posted February 17, 2015 Share Posted February 17, 2015 Have you got air con? Quote Link to comment Share on other sites More sharing options...
Abbie1994 Posted February 17, 2015 Share Posted February 17, 2015 Not sure if above is for me but il answer it any way I havent Quote Link to comment Share on other sites More sharing options...
iantt Posted February 17, 2015 Share Posted February 17, 2015 Was for you, ok, if you had then it would have been a quick way to check fan , relay wiring etc. Quote Link to comment Share on other sites More sharing options...
Abbie1994 Posted February 17, 2015 Share Posted February 17, 2015 Going to change the tempature sensor and then give up I think tbh , cars starting to smell very hot after short 10 mile journey Quote Link to comment Share on other sites More sharing options...
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