Heatrae Sadia
No Power / Dead Control
Heatrae Sadia instantaneous heater display is blank and unit appears dead.
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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
Blown internal fuse, No mains supply, Faulty isolator switch, Failed control PCB power supply
How to Fix / Troubleshooting
Safety first: Verify the circuit is isolated before opening the unit. Only competent persons should work on live circuits.
Steps to restore power:
- 1. Check external supply: Confirm the breaker is on and any local isolator switch is in the ON position.
- 2. Test incoming voltage: Have an electrician verify voltage at the heater terminals.
- 3. Inspect internal fuse: Some models have an internal fuse on the PCB or terminal block. With power off, check and replace with the correct rating if blown. Investigate cause of failure.
- 4. PCB power supply: If supply and fuse are good but the display remains dead, the PCB’s low-voltage power supply is likely faulty and the board must be replaced.
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Repair Difficulty
Hard
4/5
Required Part
Control PCB / Internal Fuse
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