AFWFilters Bypass valve failure

Softener remains in bypass and will not return to service position

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Stuck or seized bypass valve, Broken bypass handle, Internal O-ring failure, Mineral buildup inside bypass

How to Fix / Troubleshooting

Safety: Depressurize the system before attempting to remove or service the bypass.

  • Attempt gentle movement: Try to move the bypass handle between BYPASS and SERVICE without forcing it. Do not use excessive leverage that could break the valve.
  • Inspect for leaks: If the bypass leaks or will not hold position, plan to replace it.
  • Replace bypass: Shut off inlet and outlet valves, disconnect plumbing as needed, and install a new AFWFilters-compatible bypass valve. Use new O-rings and apply silicone lubricant.
  • Test operation: Slowly pressurize the system and check for leaks. Verify that the bypass moves smoothly and that water flows through the softener in SERVICE mode.
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Repair Difficulty

Medium 3/5

Required Part

Bypass Valve Assembly
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