Main information
What it could mean
An electrical fault in a water heater usually comes from its specific power line or a fault in its internal heating element, which wouldn't be a home wiring issue.
Safety first
Unplug the water heater if the RCD trips when switching it on, or if the water carries a noticeable current; don't use it until checked.
Next step
Assessed whether the fault's in the electrical installation feeding the heater, or whether the appliance and its element need checking.
Frequently asked questions
Is it dangerous to feel current in the water heater's water?
Yes, it's a real warning sign; unplug the appliance immediately and don't use it until checked.
Does the water heater need an independent circuit?
Recommended, given its consumption and because it combines electricity and water.
Could it be the heating element rather than the electrical installation?
Yes, a common cause; worth ruling out the installation first, then checking the appliance itself if needed.
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