When a water softener fails to regenerate, the malfunction is typically caused by a jammed control valve motor, a broken gear train, a fried digital control circuit board, a clogged injector nozzle, or a complete loss of electrical power. If the system's timer or meter fails to signal the motorized control head, the unit stays stuck in service mode indefinitely and never initiates the backwash or brine draw cycles. Furthermore, heavy iron fouling inside the valve body can seize the internal piston and seals. Verification: Check the digital display for error codes and initiate a manual regeneration cycle to see if the motor engages.
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