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Mend Pretherm 100 Boiler Heat Exchangers

how can i fix my pretherm 100 boiler?

I have replaced both the heat exchangers and the pumpon the advise of a heating engineer because it kept flashin F3 it is still doing this i have had no heat or hot water for 8 days

Debra
April 2009
PrethermPretherm 100Heating, Home Heating SystemsBoiler Heat Exchangers

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