E14 error and unit indicates resin tank pressure problem

Safety first: Turn off water supply and depressurize the system before loosening any fittings.

• Check outlet and drain: Ensure the outlet plumbing and drain line are not blocked or frozen. Clear any obstructions.
• Inspect bypass: Verify the bypass is fully in SERVICE and not partially closed, which can cause pressure differential.
• Reset and test: After restoring normal flow paths, clear the error and run a manual regeneration while monitoring for unusual noises or hammering.
• Sensor check: If your model has an external pressure sensor, inspect and reseat its wiring. Replace if visibly damaged.

Persistent E14 with normal plumbing conditions suggests a faulty Waterguy pressure sensor or control valve issue that may require professional service.