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We have 147 questions about mending 'optima' in category Heating, Home Heating Systems
optima 701 pressure rises when heatings on drops when off?
Optima 701 Diverter Valve?
Optima boiler?
Optima failing to fire up?
high pressure when heatings on?
Optima 701 Diverter?
Why does the Hawk II Optima keep turning on central heating without request?
boiler turns off and on?
No Hot Water OPTIMA 701 gas combi boiler?