Well everything that can go wrong will go wrong i suppose. Have rebuilt a Xsara MkII (2001) 2.0L TD Hdi after a front end crash and everything seemed to be going well until it was time to drive it places. Fine when cold, but as the temp comes up the engine will only run at 2500 RPM. Now I am guessing this is because it getting too hot, and the reason it's getting to hot is because the fan isn't kicking in. I have tested the fan accross a battery and it runs fine, (It should do, it's brand new) so my question is where is the censor/switch and how do I test it? Thanks Ian