My Water Softener Won't Regenerate: Causes & Fixes

If your water softener won't regenerate, start with the simple checks: make sure it has power and the correct time of day, that the bypass valve is in the service position, and that there is salt in the brine tank sitting above the water line. Most failures come down to one of four things: settings (often scrambled by a power outage), salt problems like a bridge, a clogged injector or drain line, or a worn motor or meter in the control valve. A manual regeneration test tells you quickly which one you are dealing with.

What Happens When a Water Softener Regenerates

The resin beads in your mineral tank trap calcium and magnesium. When they are loaded up, the control valve runs a regeneration: it backwashes the bed, draws brine from the brine tank through the injector, rinses the resin, and refills the brine tank for the next cycle. The wastewater goes out the drain line. If any one of those steps fails, the resin is not recharged and hard water comes back.

First, Figure Out Which Problem You Have

"Won't regenerate" usually means one of two things, and the fixes are different:

• It never starts a cycle. There is no sound or display activity at the scheduled time, and the water level in the brine tank never changes. Look at power, settings, the bypass and the meter.
• It cycles, but the water stays hard. You hear the valve run, but the brine level does not drop and salt is not being used. Look at salt bridges, the injector, the brine line and the drain line.

To test it, start a manual regeneration (on most valves you press or hold the regen button; your manual has the exact method) and stay with the unit. You should hear the motor move between positions, water should run to the drain, and during the brine draw the water level in the brine tank should drop noticeably. Our guide on how to regenerate a water softener manually walks through it step by step.

Why a Water Softener Won't Regenerate Automatically

Power, Clock and Settings

• No power. Check the plug, any GFCI outlet it is on, and the transformer. A blank display means no regeneration.
• Wrong time of day after an outage. Most valves regenerate in the early morning hours. If the clock reset after a power loss, cycles may run at odd times or seem to stop. Reset the time and confirm your other settings.
• Settings that delay regeneration. On a metered softener, a hardness setting that is too low or a capacity setting that is too high tells the valve it has more soft water left than it really does, so it waits too long. Set hardness to your measured grains per gallon, plus about 5 gpg for each 1 ppm of ferrous iron. See the ideal hardness setting for your softener .
• Timer mode with too many days between cycles. Older timer-only softeners regenerate on a fixed schedule whether you used water or not. If the day interval is set too long, you run out of soft water first.

Bypass Valve or Meter Not Counting Water

A metered (demand) softener only regenerates after a set number of gallons pass through its meter. If the bypass is partly or fully in bypass, water skips the meter and the valve never counts down. A meter turbine jammed with sediment or a loose meter cable has the same effect. Watch the display while a faucet runs: most valves show a flow indicator or a falling gallon count. If nothing changes, the meter needs cleaning or replacement.

Salt Problems

• Salt bridge. A hard crust forms above the water and leaves a hollow underneath. The valve cycles, but the water below the crust never becomes brine. Push a broom handle gently down through the salt; if it hits a solid layer, break it up carefully. See how to prevent salt bridging .
• Salt mushing. A layer of fine, recrystallized salt sludge at the bottom can block the brine well and screen. Empty it, clean the tank and refill with clean pellets.
• Not enough salt. Keep the salt level a few inches above the water at all times, or the brine will be too weak to recharge the resin.

Clogs and Restrictions

• Clogged injector or injector screen. The injector is the small venturi in the valve that pulls brine into the resin tank. Sediment, iron or salt debris can block it, so the cycle runs but no brine is drawn. Put the softener in bypass, relieve the pressure, remove the injector cap, and clean the screen and nozzle with warm water and a soft brush. Do not use a metal pick on the openings.
• Brine line leaks. A loose fitting or cracked brine line lets air in and kills the suction. Make sure the fittings are snug at both ends.
• Restricted drain line. A kinked, crushed, frozen or overly long drain line, or one run too high, can stop the backwash and brine draw. Check the full run and the drain flow control.
• Brine tank not refilling. If the tank gets no water after a cycle, there is nothing to make brine from next time. See troubleshooting a brine tank that is not filling .

Low Water Pressure

The injector needs steady inlet pressure to create enough suction to draw brine. On a well, a failing pressure switch, a waterlogged pressure tank or a clogged sediment filter can drop pressure during regeneration. Fix the pressure problem first; the softener usually starts drawing brine again on its own.

Worn Motor, Gears or Seals

If the display works but the valve never moves when you start a manual regeneration, or it stalls in one position, the drive motor, gears, piston or seals may be worn. Many valves show an error code when the motor cannot find its position. Write the code down and check your manual or call the manufacturer. If the unit is stuck partway through, see our stuck regeneration cycle troubleshooting tips .

Worn-Out Resin

Old or iron-fouled resin can make it look like the softener is not regenerating when it is: the cycle runs and salt gets used, but the water stays hard or soft water runs out quickly. Resin commonly lasts 10 to 15 years on clean water and less with chlorine, chloramine or iron. A resin cleaner can help with iron fouling; otherwise the resin needs replacing.

Quick Troubleshooting Table

When to Call a Pro or Replace the Softener

Get help if the valve shows a motor or position error, leaks from the valve body, or still will not complete a manual regeneration after you have cleaned the injector and checked the drain line. If your softener is old, needs both a new valve and new resin, or has never kept up with your water, replacing it often makes more sense than repairing it. When you do, size the new unit for your hardness and household so it regenerates about once a week. Our water softener systems page lists our current city water and well water models.

How to Prevent Regeneration Problems

• Check the salt level and probe for bridges every month or two.
• Use clean, high-purity salt pellets; they leave less residue than rock salt.
• Clean the brine tank when sludge builds up, typically about once a year.
• Clean the injector screen once a year, and more often on well water with sediment or iron.
• Re-check the time of day after every power outage.
• Remove iron ahead of the softener if your levels are higher than it is rated for, so the resin does not foul.

If the opposite is happening and your unit cycles constantly, see why a softener regenerates too often .

Frequently Asked Questions