Truma Combi (older boards, 4-digit catalogue) error code 0043
12V power supply faulty (overvoltage)
What to check, and in what order, is in the app. The flow Truma Combi — 12V Supply Diagnostic walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
Start free trial 14 days free, no card neededDocumented in
- Truma Combi Diagnostics Catalogue (2019-09-10)Truma
- Truma Combi Diagnostics Catalogue (Truma KG, dated 2019-09-10, 57 pp; canonical Gen-1 4-digit fault catalogue) (rv-tech-resources/58-truma-combi-hydronic/Truma_Combi_Diagnostics_Catalogue_2019-09-10_57pp.pdf)
- Truma Combi 4 / 6 / 4E / 6E / D6 Operating + Installation Instructions
- Truma Corp 1-855-558-7862 (Elkhart IN)
Related codes
- 0040Fault in the electronics
- 0041Electronics blocked: air or water temp switch opened from overheat OR…
- 0042Window switch detects open window OR PCB bridge for window switch…
- 004412V power supply faulty (low voltage)
- 0046Circulating air motor faulty OR control panel/cable faulty (or Combi…
- 0088Ignition spark interferes with electronics
- 0089Combustion air motor faulty