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We have 84 questions about mending 'optimax he 31c' in category Heating, Home Heating Systems
Why does the Hawk II Optima keep turning on central heating without request?
optima 701 pressure rises when heatings on drops when off?
Optima 701 Diverter Valve?
boiler turns off and on?
No Hot Water OPTIMA 701 gas combi boiler?
Optima boiler?
Optima 701 Diverter?
high pressure when heatings on?
Optima failing to fire up?