Err 20
Ecowater Europe
General System Fault / Undefined Error
Display shows “Err 20” and unit indicates general system fault requiring service
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Firmware exception, Multiple simultaneous sensor faults, Internal memory corruption, Control board hardware failure
How to Fix / Troubleshooting
Safety: Disconnect power before extended troubleshooting.
- Power cycle: Unplug the unit for at least 10 minutes, then reconnect. Observe if Err 20 reappears.
- Check for other codes: Some Ecowater models log sub-codes in the service menu. Access installer diagnostics to identify underlying issues (flow, sensors, motor).
- Inspect board: Look for obvious damage (burn marks, corrosion) on the control PCB.
- Factory reset: Perform a factory reset only if you have all programming data. If Err 20 persists, the control board will likely need replacement by an authorized technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Ecowater main control board
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