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