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:
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 40278 water softener full
Open the small plastic tube inside the salt tank (the brine well). Pull the float assembly up. Ensure the float moves freely and isn't weighed down by salt buildup or debris. If the float is stuck, the system won't know when to stop filling. If you've cleaned the venturi and checked the
This is the most common fix for "full" tanks. Turn off the water supply. Pull the float assembly up
If the water is or if it's just a digital error The age of your unit
If the tank is physically overflowing with water, you need to remove the excess before the system can reset:
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.