This guide covers the five key signs you need water softener service — from returning hard water spots to unexplained salt consumption. The most obvious sign you need water softener service is that hard water spots have returned to your glasses, your shower doors, and your faucets — the same spots the softener was installed to eliminate. A water softener that is working correctly removes calcium and magnesium from the water through ion exchange. The water that comes out of the softener has zero hardness. It will not leave spots. It will not form scale. It will not react with soap to create scum. When the spots return, the softener has stopped softening. The most common causes are an empty salt tank, a salt bridge — a hard crust of salt that forms above the water level, preventing the salt from dissolving into the brine — or a failed resin bed that can no longer exchange ions. The fix ranges from adding salt — $5 to $15 — to replacing the resin bed, $200 to $500, to replacing the entire softener, $800 to $2,500 installed.
A water softener is a simple machine: a resin tank, a brine tank, a control valve, and salt. The resin beads inside the tank capture calcium and magnesium ions. The brine solution from the salt tank flushes the captured minerals down the drain during regeneration. The control valve manages the cycle. When any of these components fail, the softener stops softening. The signs of failure are consistent and diagnosable. Here is what to look for.
Sign 1: Hard Water Spots and Scale Have Returned
White spots on glasses fresh out of the dishwasher. Soap scum accumulating on the shower door. Scale building up on faucet aerators and shower heads. The water feels different on your skin, less slippery, more drying. These are the original symptoms of hard water. If they have returned, the softener is not removing the minerals. Start with the simplest check: is there salt in the brine tank? A salt tank that is empty or nearly empty cannot produce brine. Without brine, the resin bed cannot regenerate. The softener is essentially a water filter that has not been recharged. Add salt, fill the tank to about two-thirds full with sodium chloride or potassium chloride pellets, and initiate a manual regeneration cycle using the control valve. The softener should resume softening within a few hours.
If the salt tank is full but the water is still hard, the problem may be a salt bridge, a hard crust that forms above the water level, preventing the salt from dissolving. The brine tank looks full. The salt is not dissolving. The brine is too weak to regenerate the resin. Break up the salt bridge with a broom handle or a long tool, gently, to avoid puncturing the brine tank, and the salt will fall into the water. Initiate a manual regeneration. If the water softens, the salt bridge was the problem. Salt bridges are more common in humid environments where the salt absorbs moisture from the air. Using higher-purity salt pellets reduces bridging.
The Environmental Protection Agency (EPA) notes that hard water is not a health concern but can reduce the efficiency of water-using appliances, particularly water heaters, and increase the amount of soap and detergent needed for cleaning. A water softener that has stopped working is not protecting your appliances or your plumbing from scale buildup. The water heater is the most expensive appliance affected by scale. A water heater operating with hard water loses efficiency and lifespan. The softener protects the water heater. When the softener stops, the scale starts.
Sign 2: The Softener Is Using Too Much Salt, or None at All
A water softener that is using significantly more salt than usual, going through a 40-pound bag every week instead of every month, is regenerating too frequently. The most common cause is a stuck control valve or a timer that has been set incorrectly. The control valve initiates a regeneration based on time or water usage. A valve stuck in the regeneration position will cycle continuously, wasting salt and water. A timer set to regenerate every night when the household only needs regeneration every 7 to 10 days will waste salt for no benefit. A demand-initiated regeneration valve, one that regenerates based on actual water usage rather than a timer, uses salt more efficiently and should be considered when replacing an older timer-based softener.
A water softener that is using no salt at all, the salt level in the brine tank stays the same for weeks, is not regenerating. The control valve has failed. The brine draw line may be clogged with sediment or salt crystals. The injector, the small orifice that draws brine from the salt tank into the resin tank, may be plugged. A softener that does not regenerate is a softener that does not soften. The resin bed becomes saturated with calcium and magnesium and can no longer exchange ions. The fix may be as simple as cleaning the injector, a $50 to $150 service call, or as extensive as replacing the control valve, $300 to $600. A softener that is not using salt needs service. The salt is the fuel. The softener runs on it. If the fuel gauge is not moving, the engine is not running.
Sign 3: Resin Beads in the Water or a Change in Water Taste
Small, golden or amber-colored beads, roughly the size of fine sand, appearing in sinks, bathtubs, or washing machine screens are resin beads from inside the softener. The resin beads are contained in the resin tank by a distributor basket at the bottom and a screen at the top. If the distributor basket cracks or the screen tears, the beads escape into the plumbing system. Resin beads in the water are a definitive sign that the softener needs repair. The beads are not harmful to health, but they will clog faucet aerators, shower heads, washing machine inlet screens, and dishwasher filters. The softener must be opened, the failed component replaced, and the escaped beads flushed from the plumbing lines. The repair costs $300 to $800.
A change in the taste of the water, salty, metallic, or different from before, may indicate a softener malfunction. Salty-tasting water means the softener is not rinsing the brine out of the resin bed completely during the regeneration cycle. The control valve is failing to flush the salt water out before returning the softener to service. The fix is typically a control valve adjustment or replacement. Metallic-tasting water may mean the resin bed is failing and releasing captured minerals back into the water, or that the softener is not working at all and the water passing through is untreated.
Sign 4: Reduced Water Pressure Throughout the House
A water softener that is functioning correctly reduces water pressure by 1 to 3 psi, negligible. A water softener that is clogged with sediment, iron, or a failing resin bed can reduce pressure by 10 to 20 psi or more, noticeable at every fixture. The softener is installed on the main water line. Every drop of water in the house passes through it. A restriction inside the softener affects the entire house. The most common cause of softener-related pressure loss is a resin bed that has become fouled with iron or sediment. The water cannot flow through the compacted resin. The pressure drops. The fix is a resin bed cleaning, $150 to $300, or replacement, $200 to $500. A softener that is causing pressure loss throughout the house should be bypassed using the bypass valve on the softener while repairs are scheduled. The bypass restores full pressure. The water will be hard until the softener is repaired.
Sign 5: The Softener Is More Than 15 Years Old
A water softener that is 15 years old or older and showing any of the signs above is a candidate for replacement rather than repair. The resin bed has a service life of 10 to 15 years. The control valve, if it is an older mechanical timer, is inefficient compared to modern demand-initiated valves. The cost of replacing the resin bed, $200 to $500, and the control valve, $300 to $600, approaches the cost of a new softener, $800 to $2,500 installed. A new softener comes with a new warranty, a modern control valve that uses salt and water more efficiently, and a resin bed with a fresh 10- to 15-year service life. The repair buys time. The replacement resets the clock.
Frequently Asked Questions
How do I know if my water softener is working?
Test the water for hardness using a test strip or a drop-count test kit, $10 to $20. Softened water should read 0 to 1 grain per gallon. If the reading is higher, the softener is not working. Also check for white spots on glassware, soap scum on shower doors, and scale on faucets. If the spots and scale have returned, the softener has stopped softening.
How often should a water softener be serviced?
A water softener needs minimal routine service. Add salt when the brine tank is one-third full or less. Clean the brine tank annually to remove sediment and salt residue. Have the softener professionally inspected every 3 to 5 years to check the resin bed condition, the control valve operation, and the brine draw. The resin bed should be replaced every 10 to 15 years. The control valve may last 15 to 20 years before needing replacement.
Why is my water softener using too much salt?
Excessive salt consumption is caused by a control valve set to regenerate too frequently, a stuck valve that cycles continuously, or a water leak in the house that is running water through the softener continuously. A running toilet, wasting 200 gallons per day, will cause the softener to regenerate daily instead of weekly. Fix the toilet before adjusting the softener.
Can I fix my water softener myself?
Adding salt, breaking up a salt bridge, and cleaning the brine tank are DIY tasks. Cleaning a clogged injector requires disassembling the control valve, moderately DIY-friendly with the manufacturer’s manual. Replacing the resin bed or the control valve requires opening the resin tank and should be done by a professional. The resin tank is under pressure when the softener is in service. Improper reassembly can cause a leak or a pressure failure.
How much does water softener repair cost?
Cleaning a clogged injector costs $50 to $150. Replacing a control valve costs $300 to $600. Replacing the resin bed costs $200 to $500. Replacing the entire softener costs $800 to $2,500 installed. A softener older than 15 years with multiple problems is usually more cost-effective to replace than to repair.
Does a water softener need electricity to work?
Most modern water softeners require electricity to operate the control valve and the timer. A power outage will not damage the softener, but the clock may need to be reset. A softener without power will not regenerate. The water will pass through the softener unsoftened until power is restored and the softener completes a regeneration cycle. A softener with a mechanical meter does not require electricity to meter the water, the meter runs on water flow, but still requires electricity for the control valve.
The Softener That Stopped Softening
The hard water spots on the glass are the evidence. The softener is not softening. Start with the salt. If the salt tank is empty, add salt. If the salt tank is full but the water is hard, break up the salt bridge. If the salt level is not changing and the water is hard, the softener is not regenerating, the control valve or the injector needs service. If the water pressure is low throughout the house, the resin bed may be fouled. If the softener is older than 15 years, replacement may be more cost-effective than repair.
Diagnose in order: salt, salt bridge, regeneration cycle, resin bed, control valve. Fix the cheapest thing first. It is usually the problem. The water softener is a simple machine that does one thing, remove calcium and magnesium from water. When it stops doing that thing, the reason is almost always one of five common failures. The spots on the glass are the message. The softener is the messenger. Listen to the messenger. The glass would like to be clean again. Ever pulled a glass out of the dishwasher, held it up to the light, and seen spots that were not there last month? The dishwasher is the same. The detergent is the same. The water is the same water that was soft two months ago and is hard now because the softener stopped working. The spots are not the problem. The spots are the evidence. The softener is the problem. The softener has been quietly failing for weeks. The glass just told you.
Last modified: July 17, 2026
