Rick H

I have a 2011 SVT Raptor in the UK, recently it would not start, engine cranks over but will not fire. First time it was under remote start but would not start on key either. I disconnected the battery, counted to 10 and refitted it and it started fine, however the heater stepper motor kept clonking for about 20 mins after. Since then it has done it 3 times, the last time was 2 days ago and it wont start at all now. Any ideas anybody?