Right, before anyone starts shouting at me to 'use the search function' I already have but this is slightly different. Every search I have checked regarding heater card is because the blower has only worked on position 4. Mine is working only on positions 3 and 4. Is it still likely its the card? I have had it out and although it was filthy there was no rust so i just cleaned it up and replaced it but its just the same. Ideas please? Didn't take long for me to start did it??