The heated seats on my Vogue have decided they are going to work. If I push the button the lights go on and after about a minute time out and go off.
Where do I start to trouble shoot this? Current cars
Range Rover Sport HSE TDV8
Range Rover TDV8 Vogue
Range Rover P38 Vogue
Range Rover CSK
Discovery 3 HSE

I believe the 'heated' seat set up differs slightly from the 'heated/cooled' set up, but this thread may well help you.
Think I read somewhere that a Vogue has a heated 'pad' on the base. My Westminster has heated/cooled seats & runs 2 'units' one on the back of the seat & one under the base. Have you checked the Wiki?

https://www.fullfatrr.com/forum/topic44946.html 2012 Orkney Grey Westminster 4.4TDV8 with Ivory interior.........nice!
Alfa Romeo Giulietta
Just one Montesa now, 349 White Wonder
Austin A40 Farina MK2
1975 Morris Marina 1.8TC
1973 Honda CB250 K4

I take it you only have the heated seats (as opposed to the climate seats)? Do both front seats not work or is it just the driver's side? If one side works but the other doesn't then it sounds like the ecu is okay and either the back or base heater pad has broken. Don't know how easy it would be to check or replace them. Also there will be connectors for the heated pads under the seat which could be part of the problem.

Also look at this thread, think it will help:
https://www.fullfatrr.com/forum/topic41063...eated+seat

Both seats act the same. I would have thought that a broken heater pad would only affect one seat? Was looking for a thread and couldn't find it so thank Fox.
The seats are only heated and not cooled. Current cars
Range Rover Sport HSE TDV8
Range Rover TDV8 Vogue
Range Rover P38 Vogue
Range Rover CSK
Discovery 3 HSE

You will be best off getting any fault codes read first. If you have a diagnostic tool, i.e. IID or similar, or can get access to one this should give you a good starter for ten.
Could be a fault with the ecu if both front seats affected.

If you need a replacement ecu, there's plenty on ebay, for example:
https://www.ebay.co.uk/itm/RANGE-ROVER-L32...0008.m2219

My passenger seat seems to work on my new car, my driver is not blowing air. New peltor I suppose. Heated steering works a treat. 2009 TDV8 3.6