# Softener stopped softening: diagnosis order

> When a softener stops softening, work the checklist in order: salt, brine, valve, resin, then settings. Nine times out of ten it is one of the first three.

Canonical: https://watertreatmentpro.com/softener-hard-water-again/

Last updated: 2026-11-09

A softener that stops softening is almost never a failed resin bed. In practice the order is salt, brine, valve, settings, and resin last, because the first four account for the overwhelming majority of failures and each takes minutes to check. Work the list in sequence and you will usually find the fault before you spend money.

## Confirm the Symptom Before You Open Anything

Start with a hardness test, not a screwdriver. A titration kit or a strip at the kitchen cold tap gives you a number. Hardness bands are 0 to 3 GPG soft, 3 to 7 moderate, 7 to 10 hard, and above 10 very hard. If the tap reads 9 GPG and it used to read 1, the softener is genuinely offline.

Then test a second point. An outdoor spigot or a hose bib upstream of the softener should read raw hardness. If both taps read identically high, the softener is bypassed or the plumbing has a crossover. If the indoor tap reads hard and the outdoor tap reads hard at the same number, you have learned nothing yet; if the outdoor tap reads higher, the softener is working partially.

Also check the obvious: is the bypass valve fully in service position? A valve left half open after a repair passes raw water and looks exactly like a softener failure.

## Step 1: Salt Level and Salt Bridge

Open the brine tank and look. Salt should sit above the water line and be loose, not crusted. Two failures live here.

A **salt bridge** is a hard shelf of salt spanning the tank with an empty void underneath. The tank looks full, the float never drops, and the unit regenerates with no brine. Break it with a broom handle, then stir. A **salt mush** is the opposite: wet salt that has dissolved into a solid sludge at the bottom, blocking the brine pickup. Both are covered in [salt mushing in the brine tank](https://watertreatmentpro.com/salt-mushing/).

If the tank is simply empty, refill it and run a manual regeneration. That is the entire repair. Salt consumption of 8 to 12 pounds per regeneration is normal, and a household on very hard water can burn through a 40 pound bag in a few weeks.

## Step 2: Brine Draw

This is the check most homeowners skip and the one that finds the real fault. Put the unit into a manual regeneration and watch the brine line, the small tube running from the brine tank to the valve.

During the brine draw phase, you should see and hear liquid moving through that line for roughly 10 to 20 minutes. If nothing moves, the cause is one of:

- A clogged brine line or brine valve screen
- A blocked injector or injector screen on the valve body
- A failed venturi that cannot create suction
- A float assembly stuck at the bottom of the tank

Clean the injector screen first. It is a small mesh part, usually accessible behind a cap on the valve, and it is the single most common blockage. Rinse it, reassemble, and rerun the cycle.

## Step 3: The Valve and Its Settings

If brine draws normally but the unit still does not soften, look at the controller. Confirm the hardness setting matches the actual water. A unit programmed for 5 GPG on water that tests at 18 GPG will run out of capacity in days. Confirm the capacity setting matches the tank: a 32,000 grain unit set as 48,000 will exhaust early every cycle.

Then check the regeneration schedule and the meter. Metered valves regenerate on gallons used; if the meter turbine is stuck, the valve thinks the house has used no water and never regenerates.

| Symptom | Likely cause | Typical fix cost |
|---|---|---|
| No salt use for weeks | Salt bridge or empty tank | $0 - $60 in salt |
| Brine line dry during regen | Clogged injector screen | $0 - $150 service |
| Regenerates every night | Meter fault or wrong hardness setting | $150 - $300 |
| Hard water at every tap | Bypass open or valve not cycling | $0 - $400 |
| Hard water plus resin in drain | Broken distributor or failed resin | $300 - $600 rebed |

## Step 4: Resin Condition

Resin is the last thing to blame, and the easiest to misdiagnose. A healthy bed is amber to dark brown and moves freely when you stir it. Signs of real failure:

- The bed has shrunk visibly below its normal level, meaning resin escaped during backwash
- The resin is coated orange or black, indicating iron or organic fouling
- Resin particles appear in the drain line or in hot water screens

Iron fouling is the most common resin killer, and it usually traces back to raw iron above 2 to 3 ppm entering the bed. A softener cannot regenerate iron off cation resin at those levels, so the bed loses capacity permanently. A rebed costs $300 to $600 and restores performance; if iron is still high afterward, the correct fix is an iron filter ahead of the softener, not another rebed. See [iron filter types](https://watertreatmentpro.com/iron-filter-types/).

## Step 5: Decide Repair or Replace

Equipment life runs 10 to 15 years. If the unit is 12 years old, the valve needs a $250 rebuild, and the resin is fouled, replacement is usually the better spend. New equipment runs $600 to $2,500, installation $500 to $1,500, and installed total $1,200 to $4,500.

If the unit is 5 years old and the fault is a $40 injector screen, repair. The decision rule is simple: if the repair exceeds about a third of a replacement quote and the unit is past year eight, replace.

## Your Diagnostic Sequence

1. Test hardness at the kitchen tap and at an untreated outdoor tap.
2. Confirm the bypass valve is fully in service position.
3. Open the brine tank and check for salt bridge or mush.
4. Start a manual regeneration and watch the brine line draw.
5. Clean the injector screen and rerun the cycle.
6. Verify hardness, capacity, and meter settings against the lab report.

Most people find the fault at step 3 or 4. If you get through all six and the water is still hard, call a service tech and describe exactly what you observed, because that description is worth more than an hour of billable diagnosis. For the cost side of that call, see [water softener repair](https://watertreatmentpro.com/water-softener-repair/).