Heatrae Sadia
Reduced Heating Output
Heatrae Sadia electric water heater runs but delivers only lukewarm water.
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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
One of multiple heating elements failed, Incorrect power setting, Excessive flow rate through heater, Limescale on element or heat exchanger
How to Fix / Troubleshooting
Safety first: Isolate power before opening the unit. Hot water can scald.
Steps to improve temperature:
- 1. Reduce flow rate: Slightly close the outlet tap or adjust any flow restrictor to reduce flow, allowing water more time to heat.
- 2. Check power setting: On models with selectable kW ratings, enter the installer menu and confirm the heater is set to the maximum appropriate power for the installation.
- 3. Test elements: With power off, measure resistance of each heating element. Replace any open-circuit element with the correct Heatrae Sadia part.
- 4. Descale: In hard water areas, descale the heat exchanger or replace if heavily scaled, as scale reduces heat transfer.
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Repair Difficulty
Medium
3/5
Required Part
Heating Elements / Heat Exchanger
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