How to diagnose hard water breakthrough on a Culligan Marlo MGT / MFT Twin water softener
Hard water breakthrough means the resin bed has exhausted before regeneration triggers. Check salt level and brine concentration, then verify the regeneration time clock setpoint against actual water usage.
~45 min7 steps
How to correct high sodium in treated water from DI column exhaustion on a Culligan Marlo MGT / MFT Twin
Rising conductivity and sodium leakage from a DI column means the cation or mixed-bed resin is exhausted. Regenerate if the system is designed for it; replace the resin if it is a single-use or unregenerable mixed bed.
~60 min6 steps
How to fix regeneration failure and a stuck control valve on a Culligan Marlo MGT / MFT Twin water softener
A stuck regeneration valve is almost always a failed drive motor, a stripped cam gear, or debris blocking the valve piston. Verify motor voltage, cam position, and piston movement before ordering parts.
~60 min6 steps