The answer to 'water softener making noise' is that a noisy water softener is often caused by issues with the internal components or the water pressure. Common causes include a failing motor, worn bearings, or high water pressure entering the system.
Some symptoms of a noisy water softener include grinding, knocking, or vibrating sounds. If the noise is persistent or getting worse, it's best to have a professional plumber inspect the system. Trying to fix a noisy water softener yourself can be risky and may lead to further damage if the root cause is not properly diagnosed and addressed.