Ariston
Overheated Electrical Connections
Ariston water heater emits a burning smell or shows signs of melted plastic near the wiring compartment.
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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
Loose terminal screws causing arcing, Undersized wiring, Corroded or oxidized terminals, Overloaded circuit not matched to heater rating
How to Fix / Troubleshooting
Safety first: Immediately turn off power at the breaker. Do not continue using the heater until inspected.
- Inspect terminals: Remove the cover and check the main power terminal block and element terminals for discoloration, melting, or charring.
- Replace damaged components: Replace any burnt terminal blocks, connectors, or wiring with appropriately rated parts.
- Tighten connections: Ensure all screws are firmly tightened to manufacturer torque specs.
- Verify circuit rating: Confirm that the supply breaker and cable size match the heater's power rating. Upgrade if necessary via a qualified electrician.
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Repair Difficulty
Hard
4/5
Required Part
Power Terminal Block
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