Just thought I would let you all know my FBH fired up for the first time this year yeasterday, and it worked.
That is all  07,TDV8,Black, Black Heated leather all round, Rear Entertainment with Headpones & Remote, TV, DVD, Pure Dab Digital Radio, Sidesteps, Adaptive Headlights, sunroof, now working fuel burning heater )))

you lucky

is there any basic checks to be done if they don't ??
Don't think mine is
nick 2007 HSE V8, steps fitted, interior & reversing LED's, Black badges

read this guide on the Disco 3 forum, it is the same system.
http://www.disco3.co.uk/wiki/Fuel_Burning_Heater and for a more indepth view, check this guide http://www.disco3.co.uk/gallery/albums/use...tion~9.pdf 07,TDV8,Black, Black Heated leather all round, Rear Entertainment with Headpones & Remote, TV, DVD, Pure Dab Digital Radio, Sidesteps, Adaptive Headlights, sunroof, now working fuel burning heater )))