A water softener has two kinds of upkeep that people often lump together. The first is the routine refill, adding salt to the brine tank when the level drops. The second is the periodic cleaning and inspection of the brine tank and control valve. Most homeowners can handle the refill themselves. The service work is a judgment call, and it helps to settle it before the salt runs out or the water starts coming through hard.
Start With the Owner's Manual
Find the manual for your specific unit before you touch anything. It will say what salt type the maker allows, how full the brine tank should be kept, and whether the settings need resetting after a power loss. If the manual is missing, the model and serial number on the valve or cabinet are the details you need to request a copy from the maker or the installer. Some warranties also depend on using the recommended salt and following the maintenance schedule, so read that section before you decide who does the work.
Refill the Salt Yourself When the Job Is Simple
Refilling is a low-skill task when the tank is easy to reach. Buy salt labeled for water softeners and store the bags dry, off a damp floor. Fill to the level the manual sets, not to the rim. Overfilling can interfere with the float or the brush and create the very problem the refill was meant to prevent. Bags are heavy, so a cart or a second person makes the job safer.
If you find a hard crust at the top of the salt, you may have a salt bridge, where the salt has formed a shell over empty space. Breaking it up is a task many owners can do, but only if the manual allows it and you avoid scraping or striking the tank walls.
Hire Out the Work That Opens the System
Call a service technician for anything that involves opening the control valve, cleaning the brine well, testing hardness at the tap in a way you cannot repeat yourself, or diagnosing why the unit is not regenerating. Also call for a leak at the tank or fittings, water that tastes salty, or a valve error that the manual does not clear. If the water is still hard after a refill and the unit appears to be running, a tap test is the next step, and the technician should show you the reading.
Ask the Service Visit Questions in Writing
Before you book, ask what the visit covers: brine tank cleaning, valve inspection, a check of the regeneration and time-of-day settings against your water, and a look at the resin bed if the company offers it. Ask whether parts are included in the price, and whether the technician will leave a written note of the readings taken and any settings changed. Ask what the company expects you to watch for between visits and who to call if the unit stops working.
Decide the Split Once
Write down which chores you own and which belong to the service company. A simple split often looks like this: you check the brine level and refill the salt on a schedule you set from the manual, while the company handles the valve, the brine tank, and the settings. Keep that list near the unit so anyone in the house knows who tops up the salt and who to call when something changes.