All seems to be okay but fan does not kick off and boiler does not start. Is there any way to check the circuit board to see if that has gone faulty?

Nima, July 2005

Remember that if the repair requires the replacement of any gas carrying part then you MUST be CORGI Reg. Failure to comply is illegal. If a problem / damage arises from a dodgy repair your home insurance will be void.
Thanks
Wayne

Wayne, July 2005

Check for voltage at the gas valve. It may be a 24v valve or 240v. Another way is to isolate the boilers power supply, remove both wires on the gas valve solenoid and check for continuity. None = Faulty. Conti + Ok. What`s the boiler type / make
Thanks
Wayne
wlgas@blueyonder.co.uk CORGI REG Serving the north west for all your heating and plumbing needs.

Wayne, July 2005

First check there is no hidden reset button anywhere and if not then you need to prove that the boiler is getting a good 240v when the controls are switched on

steve, July 2005