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Vaillant boilers
Specifications, fault codes and service routines for popular Vaillant gas boilers on BoilerTag.
- ecoTEC plus 612
- ecoTEC plus 615
- ecoTEC plus 618
- ecoTEC plus 618 Propane
- ecoTEC plus 624
- ecoTEC plus 630
- ecoTEC plus 630 Propane
- ecoTEC plus 637
- ecoTEC plus 824
- ecoTEC plus 831
- ecoTEC plus 831 Propane
- ecoTEC plus 837
- VU 10CS/1-5 (N-GB) ecoTEC plus 610
- VU 15CS/1-5 (N-GB) ecoTEC plus 615
- VU 20CS/1-5 (N-GB) ecoTEC plus 620
- VU 25CS/1-5 (N-GB) ecoTEC plus 625
- VU 30CS/1-5 (N-GB) ecoTEC plus 630
- VU 35CS/1-5 (N-GB) ecoTEC plus 635
- VUW 20/26CS/1-5 (N-GB) ecoTEC plus 826
- VUW 25/32CS/1-5 (N-GB) ecoTEC plus 832
- VUW 30/36CS/1-5 (N-GB) ecoTEC plus 836
- VUW 30/40CS/1-5 (N-GB) ecoTEC plus 840
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…