Theres only one sensor for the HDi, its blue and in the location above. Better hope its not that failed on yours though, you'll have the plastic end tank that is likely to break if you try removing the sensor... I have a metal replacement if you need one. 
Just ticking over?? You'll NEVER get it up to temp ticking over in this weather.
Difficult enough in 25c heat lol.
(10-01-2015, 05:55 PM)Bassman85 Wrote: Ok cheers I haven't got a Haynes yet so it can wait lol typical French electrics
(10-01-2015, 05:53 PM)Toms306 Wrote: Coolant level sensor is a twist fit in the header tank, they often fur up and think theres no coolant, remove it and clean it.Thy as great cheers buddy, well I haven't got it on the road at the moment so it is just left ticking over on me drive so I guess its fine, I'll see when I get it going prob not till April
As for the temp, how far are your journeys? If they're short you'll be lucky to get the temp needle to move this time of year in a HDi! If they're reasonable (15 mins+) you should see the needle just about manage 75c lol. If not, either a faulty sensor or stuck thermostat.
Just ticking over?? You'll NEVER get it up to temp ticking over in this weather.
Difficult enough in 25c heat lol.