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home Fix label Heating label_important Home Heating Systems category Vaillant

how can i fix vaillant ecomax combination boiler?

i have no hot water or heating the fault shows numbers f21 34 25 50 48
corrigan.m, October 2009
home Fix label Heating label_important Home Heating Systems category Vaillantdone
hi i have an Vaillant ecomax 613e and it is showing code F21 please can you tell me what this code means.

Hamid, December 2009
hi, i have an Vaillant Boiler ecomax 613e and it is showing code number F21 plase can you tell me what this code means.

Thanks

Imran, December 2009
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