i am not covered with a guarantee because i fitted the boiler myself.
to david937,coljack,jay1.
can we let the OP come back with an answer, b4 we give him possible solutions, at best he should be posting into Agile`s Combustion Chamber.
for all we know he could be a slum landlord, installing his gas appliances into his property`s
or he could be an RGI looking for advice