Truma AquaGo error code W20 (flash: 3s,1l,1s,1l,2s)
WIT (water inlet temp sensor) — short, open, unplugged, OR sensing colder than 14 °F (-10 °C)
What to check, and in what order, is in the app. The flow Truma AquaGo — error code / symptom diagnostic (DLE60B / DLE60C / DLE60CP) 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_AquaGo_Basic_Comfort_ComfortPlus_Operating_Installation_Instructions.txt
Related codes
- W11 (flash: 4s,1l,1s,2l)MCU watchdog did not release the gas path despite heating request
- W12 (flash: 4s,2l,2s)Internal error — generic controller fault
- W13 (flash: 4s,2l,1s,1l)Short-circuit detection in gas valve shut-off section — drew >1000 mA…
- W16 (flash: 3s,1l,4s)Malfunction of the MCU — internal control unit error
- W22 (flash: 3s,1l,1s,2l,1s)Gas valve modulation section — modulator coil shorted, open, or…
- W23 (flash: 3s,1l,1s,3l)Supply voltage too high — detector measured >16.4 V
- W24 (flash: 3s,2l,3s)Supply voltage too low — detector measured <10 V
- W25 (flash: 3s,2l,2s,1l)Flue fan current out of limits — drawing more or less than permitted
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