Contoure error code E3
Overheat - the manual titles it 'Thermostat failure': the heater ran in a high-load state for too long, or the water supply pressure is too low or the supply gas pressure too high, and the outlet overheated.
What to check, and in what order, is in the app. The flow Contoure AA-65KWO - error code lookup 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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- Contoure AA-65KWO Tankless Water Heater Instruction ManualContoure (National Quality Products, LLC)
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