Hi, I have just bought a 61 plate Octavia 1.6 Mpi petrol and heaters are blowing cold. Car is showing proper running temp and blowers are working, but turning the temp control know on dash does not raise the temp of the blown air. Just wondered if it was a common fault. Thanks in advance

I've had dash vent sensors go on two octys and in both cases resulted in only cold air but from passenger side only - driver's side worked fine.