Suburban IW60 / Nautilus error code E9
Water NTC fault — water input or output NTC open/short circuit (AUTOMATIC RECOVERY). Per service manual §Error E9; was incorrectly labeled 'Recirculation failure' in earlier Suite versions.
What to check, and in what order, is in the app. The flow Suburban tankless — IW60 / ST-42 / ST-60 error code + symptom 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.
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- Suburban_Nautilus_IW60_Service_Training_Manual.txt
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