When a water softener stops softening water, the failure is typically caused by one of several common mechanical or chemical issues. First, the system may simply be out of salt, or a hard salt bridge may have formed inside the brine tank, preventing water from reaching the salt pellets to create brine. Second, the resin beads inside the mineral tank may be fouled by iron, silt, or degraded by high chlorine levels, rendering them unable to capture hard calcium ions. Third, a broken control valve piston or clogged injector nozzle can prevent regeneration cycles. Verification: Check salt levels, break up any salt crust bridges, and run a manual regeneration cycle.
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