E07
Heatrae Sadia
Triac / Power Switching Device Fault
Heatrae Sadia digital water heater shows E07 and does not start heating when a tap is opened.
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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
Shorted triac on PCB, Open-circuit triac, Overheated power module, Incorrect wiring causing overload
How to Fix / Troubleshooting
Safety first: This fault involves live power electronics. Isolate the supply and do not attempt board-level repairs unless you are suitably qualified.
Steps to address E07:
- 1. Power cycle: Turn off power for 5–10 minutes, then restore. If E07 clears temporarily but returns under load, the power switching device is likely failing.
- 2. Visual inspection: Remove the cover and inspect the PCB around the power devices (triacs/relays). Look for burn marks, cracked solder joints, or discoloured components.
- 3. Check load wiring: Ensure heating element wiring is correctly connected and not shorted to earth or neutral. Damaged element wiring can cause triac failure.
- 4. Professional replacement: In most cases, the entire PCB or power module must be replaced with the correct Heatrae Sadia part. This should be done by a competent electrician or service engineer.
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Repair Difficulty
Professional Required
5/5
Required Part
Power PCB / Triac Module
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