Troubleshooting Kenmore Water Softener Error Code 3: Step-by-Step Guide

Kenmore water softeners are very popular and capable of treating hard water, but some users reported that Kenmore water softener error code 3 appeared on their Kenmore water softener.

  • Kenmore water softener error code 3 is a hardware error that disables the hard-drive.\n A hard-drive issue may often cause BSoD errors.

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    Turn off your water softener

    1. Press the Power button on your water softener for about 5 seconds
      Press the Power button on your water softener for about 5 seconds
    2. Turn off the power supply to your water softener
    3. Unplug it
    4. Remove the batteries from all remote controls

    Check filter

    1. If the tank is not full, fill the tank.
    2. Check if the brine tank is full.
      Check if the brine tank is full.
    3. Make sure the brine tank is not damaged.
    4. Make sure the valve is open.
    5. Check if the brine tank is filled up to its maximum.
    6. Reset the brine tank valve.
      Reset the brine tank valve.
    7. Check to see if the problem is resolved.

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  • Check the CCU

    1. The CCU is the heart of the water softener.
      The CCU is the heart of the water softener.
    2. The CCU is an electronic part that controls the entire process of softening the water.
    3. Check if the CCU is functioning correctly.
    4. Check the Electrodes
      The electrodes are electrical rods that are responsible for changing hard water into soft water.
    5. Check if the electrode is working properly.
    6. Check the Valve
      The valve is responsible for controlling the water flow through the CCU.
    7. Check if the valves are working without any issues.
      Check if the valves are working without any issues.
    8. Check the Water Inlet Screen
      The water inlet screen checks the water flow.
    9. It is normally located near the CCU.
    10. Check if the inlet screen is working properly.
    11. Check the Water Valve
      The water valve is responsible for controlling the water flow through the CCU.
    12. Check if the valves are working without any issues.
      Check if the valves are working without any issues.

    Check the valve

    1. Open the softener’s tank and check the valve. If the valve is stuck, it is blocking the water flow.
    2. Clean the valve and replace it.
      Clean the valve and replace it.
    3. If the valve is not clogged, inspect the filter

    Reset the CCU

    1. Perform a System Reset:
      Turn off the softener by pressing the Power button
    2. Remove the Power cord from the wall outlet
    3. Wait five minutes
      Wait five minutes
    4. Reinstall the Power cord from the wall outlet
    5. Turn on the softener
    6. Turn on the power switch on the control panel
      Turn on the power switch on the control panel
    7. Press the Reset button
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    Replace the CCU

    1. First, users might replace the CCU for the Kenmore water softener if the unit is not accepting new water hardness levels. The CCU for the Kenmore water softener is located inside the softener’s brine tank. The CCU determines how much water the unit will soften. To change the CCU, open the brine tank.
      First, users might replace the CCU for the Kenmore water softener if the unit is not accepting new water hardness levels. The CCU for the Kenmore water softener is located inside the softener's brine tank. The CCU determines how much water the unit will soften. To change the CCU, open the brine tank.
    2. Then, disconnect the CCU’s wires.
    3. After disconnecting the wires, the CCU should come out. Replace it with a similarly-sized CCU that fits the brine tank.
    4. Disconnect the brine tank from the water softener.
    5. Then, remove the CCU from the brine tank.
      Then, remove the CCU from the brine tank.
    6. Replace the CCU with the one you just removed from the brine tank.
    7. Then, reconnect the brine tank back to the water softener.
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