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home Fix label Heating label_important Home Heating Systems

erro code f21 what is it how do i fix it?

please advise what the above error code refers to and the correct procedure to rectify
ali b, February 2011
home Fix label Heating label_important Home Heating Systems

Fix Fault - Heating

home label Heating label_important Home Heating Systems

Remeha Avanta plus?

Heating > Home Heating Systems > Remeha

Greenstar 25 combo boiler?

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Fix Fault - Heating

home label Heating label_important Home Heating Systems

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