As the diesel heaters are flavour of the month at the moment I thought a few might like an external temp probe for the eberspacher unit. Took me a bit of digging to find the correct part and I had to buy a min of 5 probes so now have 3 left over.. Will cost you $5 each including post to your location. Probe connects to the spare wires at the controller and can be run to anywhere on very light twin cable. When the unit is powered up it will then default to the external temp probe rather than the internal. Great if you want accurate temp setting.