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Mend Vaillant ecomax Boiler Fault Code

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
VaillantVaillant ecomaxHeating, Home Heating SystemsVaillant Boiler Fault Code
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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Vaillant 282EVaillant 824/2EVaillant 837Vaillant eco TEC plusVaillant Ecomax 824EVaillant ecoTECVaillant ecoTEC plus 831Vaillant ecoTEC plus 832Vaillant Ecotec ProVaillant TurboVaillant turbo max plusVaillant Turbo Max plus 824EVaillant TurbomaxVaillant Turbomax 242Vaillant turbomax plusVaillant VCW GB 221 HVaillant VCW-GB 242 EHVaillant vcw242eVaillant VUW 242 EVaillant VUW 242E

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