CITROEN c8 2.0 HDI Interior heater failure??

Hi can anyone help!! my citroen C8 Heater has failed andas such have no interior ventilation aircon or heating. the symptoms started as right indicator flashing at doubble the speeed of the left indicator. other than that got in the car the next day turned the engine on and not ventilation at all. have changes towo fuses and checked power to the electric fan motors no power a all getting to either motor both wires dead as a do do. spoke to citroen who said bring it in, obviously at a premium price !! any ideas on what is wrong? I had a fan motor burn out 13 months ago and the symptomes were obvious i.e smell of burning followed by motor cutting in and out. This timse the the only warning was the indicator flashing erratically.