Once a year, let the salt run low and clean out the bottom of the brine tank to remove sediment.
The safety float stuck in the "up" position tells the computer the tank is full even if it isn't.
If you've cleaned the venturi and checked the float but the tank stays full, you may need to replace the or the Rotor Position Switch . If you'd like to troubleshoot further, tell me: 40278 water softener full
Unscrew the cap on the venturi housing (usually on the top of the valve).
Debris prevents the system from sucking brine out of the tank during regeneration. Once a year, let the salt run low
Once you have cleaned the nozzle and venturi, start a manual "Extra Regeneration." Watch to see if the water level drops during the "Brine Draw" cycle. Preventing Future 40278 Errors
The most manual method but effective for small amounts. Wet/Dry Vac: The fastest way to suck out excess brine. If you'd like to troubleshoot further, tell me:
When your brine tank fills with too much water, it prevents the system from regenerating properly, leading to hard water bypass and potential flooding in your laundry room or basement. Common Causes of the 40278 Error
Understanding the Meaning and Solutions for the "40278 Water Softener Full" Error
A hard crust of salt forms over the water, tricking the sensor or preventing water displacement.