Short answer: When a water softener is not working, the cause is usually simple: no salt reaching the water, a salt bridge, the bypass valve left open, a clock reset by a power outage, or a clogged injector. Check those first. If the softener is not working after those checks and the unit is 10 to 15 years old, worn resin or a failing valve usually means replacement is the better value.
What this guide covers
- How to tell your softener is not working
- 1. Softener not working because the salt is gone or bridged
- 2. Softener not working because the bypass valve is open
- 3. Softener not working because the clock or settings are wrong
- 4. Softener not working because brine is not being drawn
- 5. Softener not working because iron has fouled the resin
- 6. Softener not working because the resin is worn out
- 7. Softener not working because the valve has failed
- 8. Softener not working because it was never sized right
- 9. Softener not working: repair or replace?
- Frequently asked questions
How to tell your softener is not working
The signs come back slowly, which is why many people miss a softener not working for weeks. White scale returns on faucets and shower glass, dishes come out spotted, soap stops lathering, and skin and hair feel dry again. In San Antonio, where tap water commonly runs 15 to 20+ grains per gallon, a softener not working shows up fast.
The most reliable check is a hardness test at a cold tap after the softener. Inexpensive test strips work for a quick look. Soft water should read close to zero grains per gallon. If it reads close to your raw water, the softener is not working, or it is being bypassed.
Before you call anyone about a softener not working, work through the checks below in order. Most of the time a softener not working has one of the first four causes, and you can fix those yourself in a few minutes.
1. Softener not working because the salt is gone or bridged
The first check for a softener not working is the brine tank. Lift the lid. If the salt level is low, refill it with clean softener salt and run a manual regeneration. If the tank looks full, push a broom handle down through the salt. If it hits a hard crust with an empty space underneath, you have a salt bridge.
A salt bridge forms when humidity, the wrong salt or overfilling makes the top layer fuse into a shell. The softener draws water from under the shell, finds no salt to dissolve, and regenerates with plain water. The tank looks full, but the softener is not working because the resin never gets recharged.
To fix a softener not working because of a bridge, break it up gently with the broom handle, scoop out any loose crust, and run a regeneration. Keeping the salt level at about half full and using clean pellet or crystal salt makes bridges much less likely.
- 15 to 20+grains per gallon in San Antonio tap water
- Near 0gpg after a working softener
- 10 to 15 yrstypical resin and valve life on city water
2. Softener not working because the bypass valve is open
Every softener has a bypass valve so it can be isolated for service or for watering a lawn. If someone turned it to bypass and forgot, untreated water flows straight past the softener into the house. This is one of the most common reasons a softener is not working after a plumber, a home inspector or a move.
Find the valve on the pipes at the back of the control head. Depending on the model it is a push-pull knob, a lever, or a set of three valves. Put it in the service position, then run a cold tap for a few minutes and test again.
If the bypass is in service and the softener is not working still, move on. The next causes involve the controls and the brine draw.
- 1Test the waterCheck hardness at a cold tap after the softener.
- 2Check the saltRefill if low, and probe for a salt bridge.
- 3Check the bypassMake sure the valve is in the service position.
- 4Check the clock and settingsCorrect the time and compare the hardness setting with a fresh test.
- 5Run a regenerationWatch whether the brine tank level drops during the cycle.
- 6RetestTest again a few hours after the cycle finishes.
- 7Call for serviceIf the softener is not working after these checks, get it inspected.
3. Softener not working because the clock or settings are wrong
Older timer-based valves regenerate at a set time on set days. A power outage can reset the clock, so the unit regenerates in the middle of the day or not at all. If your softener is not working after a storm, check that the time on the display is correct.
Metered valves regenerate by gallons used, based on the hardness number programmed in at installation. If that number was set too low, or your water got harder, the softener runs out of capacity between cycles. In that case the softener is not working for the last part of each cycle, and you get hard water on some days but not others.
Compare the programmed hardness with a fresh test of your incoming water. If they do not match, reprogram it or have it reset. A correctly sized unit on San Antonio city water usually regenerates every few days, not every day.
| Symptom | Likely cause | What to do |
|---|---|---|
| Hard water, salt tank looks full | Salt bridge | Break the crust, regenerate |
| Hard water, salt level low | Out of salt | Refill, regenerate |
| Hard water after service work | Bypass valve open | Return valve to service |
| Regenerates at the wrong time | Clock reset by power outage | Reset the time |
| Brine tank full of water | Clogged injector or brine line | Clean or replace parts |
| Orange brine tank, fading capacity | Iron fouling | Resin cleaner, add iron filter |
| Beads in aerators, low pressure | Worn resin | Rebed or replace |
| Water running to drain | Worn valve seals or piston | Repair or replace valve |
4. Softener not working because brine is not being drawn
During regeneration the valve uses a small injector, sometimes called a venturi, to pull brine from the salt tank into the resin. Sediment, salt grit or iron can clog it. When that happens, the water level in the brine tank stays high after a cycle and the resin is rinsed with almost no salt.
The brine line between the tanks can also crack, kink or come loose at the fittings, which breaks the suction. A softener not working with a brine tank full of water is usually one of these two problems.
Cleaning an injector means opening the valve body, so follow the manufacturer’s instructions or call a technician. A worn brine float or safety valve can cause similar symptoms and is a simple part to replace.
5. Softener not working because iron has fouled the resin
A softener not working on a Hill Country well is often an iron problem. Penn State Extension notes that oxidized iron will clog softener resin. Once the beads are coated, they can no longer swap hardness minerals for sodium, and capacity drops a little more with every cycle.
Signs include orange staining in the brine tank, rusty water after regeneration, and a softener that worked well for a year or two and then slowly faded. A resin cleaner can help if the fouling is light, used according to the manufacturer’s directions.
The lasting fix is to remove iron before it reaches the softener with a dedicated iron filter. Without that, the same thing happens again, and new resin gets fouled just like the old.
6. Softener not working because the resin is worn out
Resin does not last forever. Chloramine in city water slowly breaks the beads down, and iron or sediment shortens their life on wells. On San Antonio city water, resin often lasts somewhere in the 10 to 15 year range, and sometimes much less.
Worn resin swells, turns to mush and can pack down, which restricts flow and lowers capacity. When resin fails, broken beads escape into the plumbing and show up as small amber grains in faucet aerators. A softener not working with resin beads at the tap needs attention soon.
For a softener not working because of old resin, rebedding the tank can make sense on a good valve. On an older system it is often the moment to compare the cost of a rebed against a new, correctly sized unit.
7. Softener not working because the valve has failed
The control valve has a motor, gears, seals and pistons that move the softener through each cycle. After years of service, seals wear and pistons stick. Water may run to drain constantly, the unit may hum without moving, or it may get stuck partway through a regeneration.
For a softener not working because of the valve, some parts can be replaced, depending on the brand and age. Others are no longer made, which can make an otherwise sound softener impossible to repair.
If the softener is not working and the valve is the problem, a technician can tell you whether parts are available and whether a repair makes sense compared with replacement.
8. Softener not working because it was never sized right
Some cases of a softener not working come from a unit undersized from the start. A unit chosen for average use runs out of capacity in a large household, especially with very hard water. Others are oversized and rarely regenerate, which can let the resin channel or grow bacteria.
Sizing depends on hardness, the number of people, daily water use and peak flow. In San Antonio and the Hill Country, the high hardness means a small box from a store can be overwhelmed quickly.
If your softener is not working and has never worked well, the problem may not be a fault at all. It may be the wrong unit for your water.
9. Softener not working: repair or replace?
When a softener is not working, repair makes sense when it is younger than about ten years, parts are available, and the problem is clearly one component: an injector, a seal, a float or a motor. Simple fixes for a softener not working, like clearing a salt bridge or correcting the settings cost little or nothing.
Replacement makes sense when the unit is 10 to 15 years old or more, the resin is worn, the valve parts are discontinued, or the softener was never sized right. Paying for a series of repairs on an old system often costs more over time than a new one designed for your water.
Gaines Soft Water services and replaces softeners across San Antonio and the Hill Country. We test your water, check the unit, and tell you plainly whether a repair or a new system is the better value.
Frequently asked questions
Why is my water softener not working but the salt is full?
The most likely cause is a salt bridge, a hard crust that leaves an empty space under the salt so no brine forms. A clogged injector or a damaged brine line can also stop the brine from being drawn. Probe the salt with a broom handle first.
How do I know if my water softener is working?
Test the water at a cold tap after the softener with a hardness test strip or kit. Softened water should read close to zero grains per gallon. You should also see the salt level drop over time.
Can a power outage leave a water softener not working?
Yes, on many timer-based models. The clock resets, so the softener regenerates at the wrong time or not at all. Reset the time on the display after an outage.
How long should a water softener last?
The control valve and resin typically last 10 to 15 years, and the tanks often last longer. Chloramine in city water and iron in well water can shorten resin life.
Is it worth repairing an old softener not working well?
If the unit is under about ten years old and the fault is one part, a repair usually makes sense. If it is 10 to 15 years old, the resin is worn or parts are discontinued, replacement is often the better value.
Why does my softened water still leave spots?
Spotting can come from dissolved solids other than hardness, or from a softener that is running out of capacity before it regenerates. Test the water to see which it is.
Softener not working? Get a straight answer
We check softeners and test water across San Antonio, Boerne, New Braunfels, Canyon Lake and the wider Hill Country, then tell you plainly whether a repair or a new system is the better value.
Related reading: water softeners, softener installation, hard water treatment and free water testing.
More from this guide: how long softeners last, how often a softener should regenerate and how long a bag of salt lasts.
Sources: Penn State Extension, Water Softening, USGS, Hardness of Water, San Antonio Water System.
