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Mend Ariston Micro Genius 32 Combi Boiler Showing

Ariston Micro Genius 32 combi boiler?

My boiler is showing an error message of A 77. What should I do?

Anne
December 2010
AristonAriston Micro Genius 32Heating, Home Heating SystemsCombi Boiler Showing

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Ariston Micro Genius 32 Boiler - Error A77