I also wired in a AAA battery powered thermostatic 7 day timer but that didn't work too well because they are designed for houses and always try to maintain a minumum 5 degrees (frost protect) even between the on/off periods when you don't want the heater to come on, which is no good if you want a nice toasty van for work in the dead of winter as it will keep firing up all night if the temp is below 5 degrees
So I have ordered this
http://www.ebay.co.uk/itm/260970851903? ... 1497.l2649" onclick="window.open(this.href);return false;
Which will need power wires from the battery and will use the existing thermostat but it will give me more control. Far cheaper than the propex timer which is £75 for the same thing
