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We have 34 questions about mending 'optimax 31c boiler' in category Heating, Home Heating Systems which have been answered
optima 701 pressure rises when heatings on drops when off?
how can i fix boiler?
Trianco Optima Boiler Programmer Fault (QA73)?
how do i depressurise a ferrolli optima boiler?
high pressure when heatings on?
OPTIMA 701 Ferrori heating problem?
Big bang on ignition?
Optima failing to fire up?
how can i fix my ferolli optima 701?