Why is the water in my kettle taking much longer to boil than expected?

If your kettle is heating but the water is taking far longer than normal, the cause is often a build-up of limescale, too much water in the jug or a power issue. The kettle may still work, but slow boiling can also be a sign that it needs attention.

Start with the water level

1. Unplug the kettle and let it cool.
2. Check the water level indicator and fill only to the amount you actually need.
3. Do not overfill above the maximum mark.

Expected result: a smaller, correctly measured fill should boil faster. If the kettle is still unusually slow, move to the next check.

Check for limescale build-up

1. Look inside the kettle, especially around the heating area.
2. If you see deposits, descale the kettle following the care instructions for your model.
3. Rinse well after descaling.

Expected result: a cleaner heating surface should improve boiling speed. Heavy scale can slow heating noticeably.

Confirm the power source

1. Plug the kettle directly into a known working wall socket.
2. Avoid extension leads while testing, if possible.
3. Make sure the on/off switch engages normally and the indicator light behaves as expected on your model.

Expected result: the kettle should heat at a consistent rate. If it seems weak, the socket or supply may be at fault.

Stop using the kettle if it becomes unusually hot, smells burnt, switches off erratically or shows signs of damage. If the issue remains unresolved or safe use is uncertain, contact the retailer or store where the product was purchased.