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We have 146 questions about mending 'optima' in category Heating, Home Heating Systems
Trianco Optima Boiler Programmer Fault (QA73)?
Optima failing to fire up?
optima 701 pressure rises when heatings on drops when off?
how can i fix boiler?
how do i depressurise a ferrolli optima boiler?
how can i fix my ferolli optima 701?
OPTIMA 701 Ferrori heating problem?
Big bang on ignition?
high pressure when heatings on?