Water Softener: Repair or Replace?
The 50% rule
Replace when the repair quote exceeds half the cost of a new installed system (~$750 against the $1,500 average), or when the unit is over 10 years old with recurring problems. Repairs average $553 (Angi, 2026), and most land between $162 and $978.
Common repairs and the call
| Problem | Cost | Verdict |
|---|---|---|
| Salt bridge / brine line clog | $0 – $150 | Always fix, often DIY-free |
| Motor / timer / float | $150 – $500 | Fix if unit is under ~10 years |
| Resin bed replacement | $200 – $400 | Fix. Resin wears out before the system does |
| Control valve | $300 – $600 | Fix under 10 yrs, replace over 10 yrs |
| Brine tank / multiple failures | $150 – $700+ | Replace on an older unit |
Age is the tiebreaker: softeners last 15–20 years, so the same $500 valve job is an easy yes at year 6 and a poor bet at year 14. Also weigh salt efficiency: a modern metered unit can cut salt use substantially versus a 2000s timer unit, which shifts the math further toward replacement on old machines (what maintenance and salt actually cost).
If you're replacing: size it right this time
Many “broken” softeners were undersized from day one and simply couldn't keep up. Twenty seconds to get the number, then compare units at that capacity:
What size water softener do you need?
Frequently Asked Questions
Why is my water softener not softening?
Work through the cheap causes first: a salt bridge (crust over the brine tank water, free to break up yourself), the bypass valve accidentally open, clogged brine line or injector, then a stuck control valve or exhausted resin. Only the last two cost real money ($300–$600 valve, $200–$400 resin).
How much does water softener repair cost?
Angi puts the 2026 average at $553, with most repairs between $162 and $978. Common jobs: control valve $300–$600, resin bed replacement $200–$400, brine tank work $150–$700. A diagnostic-only service call typically runs $150–$300.
How do I know if the resin is worn out?
The softener regenerates normally and salt disappears on schedule, but water hardness returns quickly after each cycle. Resin lasts 10–15 years on municipal water, as little as 5–10 on chlorinated or iron-bearing well water. Replacement resin is a $200–$400 job and rejuvenates the system without replacing it.
Is a 15-year-old water softener worth repairing?
Usually not for a major repair. At 15–20 years a unit is at end of expected life, and a $500 valve job buys uncertain time when a new, more salt-efficient system starts around $489 plus install. Minor fixes (brine line, float, salt bridge) are still worth doing at any age.