LoSalt
Marlo Low Salt Level / Brine Concentration Warning

Display shows LoSalt or Low Salt warning; softener may eventually deliver hard water

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Possible Causes

Salt level below sensor, Salt bridge preventing salt from contacting water, Faulty salt level sensor (if equipped), Incorrect salt type

How to Fix / Troubleshooting

Safety first: Wear gloves and eye protection when handling salt and reaching into the brine tank.

Step-by-step checks:

  • 1. Check actual salt level: Open the brine tank lid and visually confirm the salt level. Add high-purity solar or pellet salt to at least halfway up the tank if low.
  • 2. Break salt bridges: Use a broom handle or plastic rod to gently push down on the salt surface. If you feel a hollow space beneath a hard crust, you have a salt bridge. Carefully break it up so salt falls into the water below.
  • 3. Inspect salt level sensor: If your Marlo model has a salt level probe or float, ensure it moves freely and is not encrusted with salt. Clean with warm water and reinstall.
  • 4. Clear LoSalt warning: After correcting the salt level, follow the control instructions to clear the LoSalt message or allow it to clear automatically after the next regeneration.

When to replace parts: If the warning persists despite proper salt level and a clean sensor, replace the Marlo salt level sensor/float assembly.

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Repair Difficulty

Very Easy 1/5

Required Part

Marlo salt level sensor
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