i have a potterton combi 80 boiler every year when cold weather here it plays up, this time can not get it to ignite pump etc are running and also replaced pcb board (whch blew as soon as switched boiler on) did call out a boiler specialist but they failed to turn up. any suggestions on what to check next as me and kids are freezing and running out of fault finding tips.

peggy, November 2009