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We have 35 questions about mending 'optimax 25c' in category Heating, Home Heating Systems
Optima 701 Diverter Valve?
No Hot Water OPTIMA 701 gas combi boiler?
optima 701 pressure rises when heatings on drops when off?
boiler turns off and on?
Optima 701 Diverter?
Optima failing to fire up?
high pressure when heatings on?
Why does the Hawk II Optima keep turning on central heating without request?
Optima boiler?