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Mend ICI Caldaie Solar 80E Combi Boiler Ignite

i have a ici caldaie solar 80e combi boiler which won't ignite?

my boiler makes all the right sounds but just locks out every time ? we had a new heat exchanger/diverter fitted last year and all has been fine ever since.
we had the boiler checked over last week by a friend of a friend (heating engineer) who checked all the mechanical parts gas valve and so on and said all looks well and could be a problem with one of the pcb's
so i took the mother board to work and had our electronics guys check/resolder
refitted still the same.
i have now fitted a brand new ignition pcb and guess what..........still the same????
i have a heathy spark from the ignition and have cleaned the fan and all breather pipes.
please help
chris

chris brown
September 2010

ICI Caldaie ICI Caldaie Solar 80E Heating, Home Heating Systems Combi Boiler Ignite

if it a issue like this dont spend money on guessing what you should do is use british gas as the charge a one of fee or £140 to non members which inc parts and labour for any fault. they come out first check and if they cant fix it no charge i know its not much help now but maybe in the future and i be guessing with out seeing in and soldering the pcb does not mean it not faulty i would advise you phone alpha as all boiler company's have a technical help line for installers and repairers and they know better than any engineer they helped me find faults like these and they will go through a fault finding and testing procedure best to have your mate the engineer around as it does help to have someone in the know

kash
September 2010