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Vaillant heat pumps
Specifications, fault codes and service routines for popular Vaillant heat pumps on BoilerTag.
- aroTHERM
- aroTHERM plus
- aroTHERM plus
- aroTHERM plus
- VWL 35/6 A 230V S2
- VWL 55/3 A 230 V
- VWL 55/6 A 230V S2
- VWL 75/6 A 230V S2
- VWL 85/3 A 230 V
Real-world Vaillant fault diagnostics
Diagnostic checklists from engineer-submitted Vaillant faults, with step-by-step checks and safety notes.
- Ecotec Plus 610 — fault F.040 →
The Vaillant ecoTEC plus 610 displaying fault code F.040 indicates that the air ratio is too low, often due to a fault in the flue gas…
- Ecotec Plus 610 — fault F.028 →
The Vaillant ecoTEC plus 610 displaying fault code F.028 indicates an ignition failure, meaning the boiler failed to ignite or detect a…