A good service visit follows a sequence, and you can check that sequence as it happens. Knowing the order lets you ask the right questions at each step and notice when something is skipped. The steps below apply to most salt-based softeners, though the exact checks depend on the unit and the provider.
Step 1: Describe the problem first
Before the technician starts, state the symptoms you have seen and when they started. Keep a short written list so the visit begins from facts, not memory. The technician should ask follow-up questions and take notes.
Step 2: Inspect the unit and its connections
The technician should check the valve and bypass position, look for leaks at every connection, and confirm the drain line is clear and secure. Ask them to point out anything that looks worn or out of place, and ask them to show you the spot on the unit where they found it.
Step 3: Check the brine tank
Look at the salt level, whether the water level in the brine tank is correct, and whether there is any crust or bridging that could stop brine from forming. Ask the technician to explain what they found, in plain terms, before they clear anything.
Step 4: Compare the settings to the written program
Ask the technician to read out or show the regeneration schedule, the capacity setting, and the hardness setting. Compare them to the paperwork from the installation and to the most recent test reading. If the settings do not match what was agreed, ask why before anything is changed. Do not accept a change you cannot verify on the display.
Step 5: Run a regeneration and watch it finish
Where it is appropriate, the technician should start a manual regeneration and stay until it completes. Confirm that the cycle moves through its stages and that the drain flow looks normal. A cycle that stalls or runs long is a finding to write down.
Step 6: Test the water after the softener
Take a reading from the treated side of the system, and note where and when it was taken. A single number tells you little without the earlier readings for comparison, so ask for the readings to go into the service record.
Step 7: Sign-off with a written summary
Before the technician leaves, ask for a written summary that lists what was checked, what was repaired or replaced with part names and model numbers, the readings taken, any warranty claim numbers, the next service date, and who to call if something changes. Read it, ask about anything unclear, and keep a copy. For what to check when judging a provider overall, see the Missouri Water Softener Buyer's Guide.