Water feels hard again / softener not working

Q: Water feels hard again / softener not working

In Canada, when a water softener stops softening, the most common cause is simply that the brine tank is out of salt or has formed a hard "salt bridge" — a crust that holds the salt up so it never dissolves. Next, make sure the unit isn't set to bypass, which sends raw water straight past it, and that its regeneration clock is still set correctly (a power outage can reset it). A fouled resin bed or a plugged injector is less common, and a failed control valve is a plumber's or dealer's job. None of the checks are hazardous — most are just a look inside a tank.

Hard water sneaking back is annoying, but the usual causes are simple and free to check — an empty salt tank or a valve left on bypass, not a broken machine.

tuneWhat are you noticing?

Select anything that matches and the checklist below reorders to fit. Not sure? Skip it.

emergency_home

flag

Start here

In Canada, open the brine tank lid and look first. If the salt is low, top it up; if you see a hard crust, press gently with a broom handle — a "salt bridge" will crack and drop into the water below. Empty or bridged salt is the single most common reason softening stops, and it costs nothing to rule out. Give it a couple of regeneration cycles to catch up.

Ranked from real-world failure data. The order updates as you select what you’re noticing above.

Likely causes, in the order to check them

Showing the typical order

Beginner-friendly Doable, with care Safety-critical Call a pro

handymanHow to fix it

Top up the salt if low; if a hard bridge has formed, gently break it with a broom handle so the loose salt drops into the brine water, then run a manual regeneration or two to let the resin recharge.

Open the brine-tank lid and check the salt level and texture. If it looks low and loose, simply top it up with the salt type your softener specifies (pellets or solar/crystal per the manual).
If the top feels like a solid crust with a gap under it, that's a salt bridge. Push a broom handle straight down in a few spots to crack it so the salt falls into the water below — go gently to avoid cracking the tank.
Avoid overfilling (keep salt no more than two-thirds full), which helps prevent future bridging. If bridging keeps happening, switch to a higher-purity salt and keep the tank away from damp, warm spots.
Trigger a manual regeneration and give the unit a cycle or two to catch up; hard water should ease within a day.

schedule15 min savings$8–25

Water softener salt (pellet or solar)Use the salt type your softener's manual specifies; higher-purity salt bridges less

visibilityHow to check

First rule out the free causes: confirm salt is present and loose (no bridge), the bypass is set to service, and the clock/settings are correct. Only suspect the resin or injector once those are clean.
Dip a hardness test strip at a cold tap and note the reading. Then start a manual regeneration, let it finish, run water a few minutes, and test again — little or no drop in hardness points to a fouled bed or a brine-draw problem.
During the brine cycle, listen and look for brine actually being drawn from the salt tank (the water level in the brine tank should drop). No draw with everything else correct points to a plugged injector/venturi rather than the resin itself.

buildhardness-test-strips schedule20 min

handymanHow to fix it

Put the unit on bypass, relieve pressure, and clean the small injector/venturi screen at the control head; for a fouled bed, run a resin cleaner through a regeneration per its directions. Reassemble and return to service.

Set the bypass valve to bypass so the softener is isolated from house water, then relieve pressure by starting a regeneration briefly or opening the unit per the manual — no water should be under pressure when you open the head.
Remove the injector/venturi cap on the control head, lift out the small screen and injector nozzle, and rinse away grit; do not enlarge the tiny orifice — clean it, don't drill it.
For a chemically fouled resin bed, add a softener-safe resin cleaner (iron-removing or general, matched to your water) to the brine tank and run a manual regeneration per the product directions; repeat if your water is high in iron.
Reassemble the injector, return the bypass to service slowly to avoid a pressure surge, and re-test hardness after a full regeneration.

schedule45 min savings$10–40

Resin bed cleaner (iron / general)Match to your water: an iron-removing cleaner for well water, a general resin cleaner otherwise

gavel Check your province first AB: homeowner may do this · BC: homeowner may do this · ON: homeowner may do this · PE: homeowner may do this · QC: licensed professionals only
Cleaning the injector, rinsing resin, refilling salt, toggling the bypass, and changing settings are generally owner-permitted maintenance; work that alters the plumbing connections may be regulated — confirm the provincial rule.

verifiedWhy this one goes to a pro

A failed control valve, motor, or timer means dismantling the head that meters your water and draws brine — get it wrong and you can flood the area, send salty water into the house, or void the unit's warranty. Many softeners are still under a multi-year warranty, so start with the dealer or manufacturer. Otherwise, have a licensed plumber or a softener service tech do the repair; the checks on this page are all you should do yourself.

Your notes travel with the request — what you saw, what you ruled out, when it started — so the pro arrives with a head start instead of a mystery.

sort

Why the list is in this order

We don’t sort by likelihood alone. We sort the way a good, honest tradesperson thinks: rule out the free, safe, common causes first. That’s why the cheap checks outrank the expensive repairs — and why anything dangerous gets a hard stop instead of a pep talk. The order exists to save you money, not to sell you anything.