I am still in shock because Aspect charged me £1333.50 for a common fault (fault 28) on my Vaillant Turbomax boiler. At no time was I warned or informed by the engineer that the repair would cost so much.  According, to three, independent Vaillant experts rectifying the fault 28 on this type of boiler should have taken no more than 1 hour 15 minutes.  The Aspect engineer charged me for more than 6 hours work.  I believe he took advantage of the fact I was abroad. If I had known even an rough estimate cost I would not have engaged Aspect services.  I tried to negotiate paying half the labour charge, however, they advised that they would not do this. Total rip off. I will be paying this off for the next 6 months.