Up to 12 years
Viessmann repair & installation
Premium German manufacturer with stainless steel heat exchangers — a long-term investment.
Popular models we service
Vitodens 050-WVitodens 100-WVitodens 200-W
Common fault codes
F.4
No flame detected
F.5
Air pressure switch
F.10
Outdoor sensor fault
F.20
Safety shut-off — overheat
F.22
Pump fault — dry running
F.38
Return sensor short circuit
