gettin warm

the disco gets i tad too warm towing the tri axle as of recently, once it warms up above norm (bottom of thermometer on guage) it then flys up and has a bit of a twitch fit,,,, now im wondering if a sensor is a bit temperamental im using it friday to take a caravan and a trailer to an agricultural show but ill take my time with it

is it a 200 or 300tdi ?

300, had a new head fuel pump etc all done by the garage who owned it, bit confuddled really

i have got a load of GENUINE 300tdi thermostats here if u need one