Heated seat not working

[ecswtrav]

Hi, my heated seat on the drivers side isnt working. I was aware of this when I bought the car over a year ago but now Ive decided to look into the problem.
When I press the button to switch the heated seat on the light (green or red) does not stick but just flashes on.
Does this sound like a swtich problem or an actual heating element problem? Has nyone experienced this and repaired it?
I'm assuming its a case of removing the seats if it is the heating element within the seat?

Thanks in advance