Should you repair or replace your water softener?
Updated August 2026
← Every repair-or-replace call
Repair a softener through its first 8 years, since the usual fault is a $150–400 control valve or a fouled resin bed, and replace once it passes 12 or both fail at the same time. The machine is simple: a resin tank, a brine tank, and a valve that runs the regeneration cycle. That valve is the moving part, and rebuilding or swapping it is routine work. Resin lasts 10–20 years on clean water but far less on chlorinated city supply or iron-heavy well water. A new softener installed runs $1,000–2,500, so two failures at once on an aging unit end the argument.
The short version
Rule out the two free explanations before diagnosing anything: a salt bridge in the brine tank and a bypass valve someone left open after plumbing work. Genuine faults split cleanly between the valve and the resin. The control valve cycles on every regeneration, wears accordingly, and at $150–400 to rebuild or replace is worth fixing on any softener under 8 years. Resin is the consumable, good for 10 to 20 years on clean water but often only 5 to 8 where chlorine or dissolved iron attacks the beads. One failure at a time is a repair. Both at once, on a unit past 12, is where $1,000–2,500 for a new system beats stacking bills on old hardware.
Your situation, decided
| Situation | Verdict | Why |
|---|---|---|
| Hard water is back, brine tank crusted solid | Repair (free) | Break the salt bridge and clean the tank; the unit is fine |
| Regeneration will not start, softener under 8 years | Repair | A $150–400 control valve or timer, not a new system |
| Resin beads in the faucet screens, unit past 12 years | Replace | The bed and distributor have broken down; a rebuild nears new |
| Iron-fouled resin on a 10-year-old softener | Judgment call | A $60–100 resin cleaner may revive it; otherwise budget $1,000–2,500 |
What each path costs
Repairs typically run $150–400; a replacement is $1,000–2,500 installed. Water softeners last 10–15 years, and the resin bed 10–20 on clean water but as little as 5–8 on chlorinated or iron-heavy supply. Repair under 8 years; past 12, replace. Price your own number on the home maintenance cost calculator before you commit either way.
The repair-or-replace call is easy when you know the unit's age and service history. OnOtto keeps both, plus the maintenance that delays this decision for years.
Start your home's service log, freeFrequently asked questions
Why is my water hard again when the brine tank is full of salt?
Salt bridging, nine times out of ten. Humidity fuses the pellets into a crust that spans the tank, so an empty pocket forms underneath and regeneration runs with no brine reaching the resin. Tap the crust with a broom handle until it breaks and settles, keep the tank no more than half full, and use pellets rather than rock salt in a damp basement. Check the bypass lever too, since a valve left in bypass sends hard water straight past the softener. The brine tank routine covers both.
Can I re-bed the resin instead of buying a new softener?
Yes, and on a unit under 10 years it is the better spend. A cubic foot of resin costs $100–200, and a professional re-bed runs $300–600 including the labor to open the tank and rinse the new media. That is a fraction of $1,000–2,500 for a new system. Past 12 years, though, the control valve is usually tired at the same moment, and paying for both takes you to replacement money anyway. The resin interval depends heavily on chlorine and iron levels.
How much salt should a softener actually use?
A family of four on moderately hard water typically goes through 30 to 80 pounds a month, depending on hardness and household water use. The trend matters more than the number. A sudden jump means the valve is stuck in regeneration or the drain line is running continuously, and a tank that stops consuming salt at all means the softener is not regenerating. Log refills alongside the rest of the softener checklist so a change stands out early.