The most manual method but effective for small amounts. Wet/Dry Vac: The fastest way to suck out excess brine.
If your water softener screen is flashing "40278" or showing a "Full" error, you are likely dealing with an overflow or a sensor malfunction. This specific code often appears on models manufactured by brands like Kenmore, Whirlpool, or EcoPure, which share a common internal design.
Clean the small screens and the tiny flow plugs with warm, soapy water. Ensure the pin-sized holes are not blocked. 40278 water softener full
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:
Avoid "rock salt" which contains impurities. Use evaporated salt pellets or solar salt. The most manual method but effective for small amounts
If the tank is physically overflowing with water, you need to remove the excess before the system can reset:
Unscrew the cap on the venturi housing (usually on the top of the valve). This specific code often appears on models manufactured
Ensure the drain hose is not kinked, frozen, or submerged in a floor drain. If the unit cannot "breathe" through the drain line, it cannot pull the brine solution out of the tank. How to Manually Empty the Tank
Understanding the Meaning and Solutions for the "40278 Water Softener Full" Error
This is the most common fix for "full" tanks. Turn off the water supply.