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Trianco Optima Boiler Programmer Fault (QA73)?
Why do my TRV's rattle?
high pressure when heatings on?
OPTIMA 701 Ferrori heating problem?
Why does the Hawk II Optima keep turning on central heating without request?
optima 701 pressure rises when heatings on drops when off?
Big bang on ignition?
Pilot light will not ignite?
Optima failing to fire up?
how can i fix my ferolli optima 701?
how can i fix boiler?
how do i depressurise a ferrolli optima boiler?