40278 Water Softener Full Better Online

Understanding the Meaning and Solutions for the "40278 Water Softener Full" Error

Debris prevents the system from sucking brine out of the tank during regeneration. 40278 water softener full

The safety float stuck in the "up" position tells the computer the tank is full even if it isn't. Understanding the Meaning and Solutions for the "40278

If the tank is physically overflowing with water, you need to remove the excess before the system can reset: 40278 water softener full

Only fill the tank about 1/2 to 2/3 full. This prevents the bottom salt from turning into a mushy "sludge" that blocks the intake.

This is the most common fix for "full" tanks. Turn off the water supply.