Truma Combi error code W 45 H
No 120VAC supply to Combi. Fault in 120VAC power supply, WECO manual reset switch engaged (Combi Plus only).
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 Service HandbookTruma
- Truma Combi Service Handbook (TrumaCorp, 20 pp; technician training handbook with Common Error Codes table and per-code Further Details sections) (rv-tech-resources/58-truma-combi-hydronic/Truma-Combi-Service-Handbook_TrumaCorp_20pp.pdf)
- Truma Combi Diagnostics Catalogue (canonical 57-code reference, external PDF at leisureshopdirect.com/pdf/370196265.pdf)
- Truma Combi 4 / 6 / Plus / E / D Technician Service Diagnostic Reference (rv-tech-resources/58-truma-combi-hydronic/Truma_Combi_4_6_Plus_E_D_Technician_Service_Diagnostic_Reference.md)
Related codes
- W 22 HPlausibility of NTC Air Temperature Sensor. Air Temperature Sensor…
- E 24 HRisk of low voltage. Battery voltage too low < 10.4 V. (Published as…
- E 25 HCurrent for air circulation motor too low. Air circulation motor or…
- E 26 HCurrent for air circulation motor too high. Air circulation motor or…
- E 69 HCurrent monitoring for air circulation motor with CP Plus - software…
- E 121 HCombustion Failure: Flame unstable. Flame unstable during operation …
- E 148 HOvertemperature of the Combustion Air Temperature Sensor. Combustion…
- E 149 HOvertemperature of the Water Temperature Switch or Air Temperature…