Truma Combi (older boards, 4-digit catalogue) error code 0042
Window switch detects open window OR PCB bridge for window switch interrupted
What to check, and in what order, is in the app. The flow Truma Combi — Window Switch Fault (Code 0042) 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.
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- Truma Combi Diagnostics Catalogue (2019-09-10)Truma
- Truma Combi 4 / 6 / 4E / 6E / D6 Operating + Installation Instructions
- Truma Corp 1-855-558-7862 (Elkhart IN)
- Truma CP Plus Manual
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