40278 Water - Softener Patched Full

40278 Water - Softener Patched Full

Troubleshooting the "40278 Water Softener Full" Error: A Complete Guide

Installation

  1. Location: Install on the main cold-water line after the pressure tank (well systems) or main shutoff, before the water heater. Keep near a drain and an electrical outlet if needed.
  2. Space: Allow clearance for service and salt refills; typically 18–24 inches around and 24–36 inches above the brine tank.
  3. Bypass valve: Install a bypass to allow water while servicing the softener.
  4. Drain line: Run an air-gap protected drain to a floor drain, standpipe, or utility sink. Keep drain lines short and downhill where possible.
  5. Brine line and overflow: Ensure brine tank overflow plumbing is directed to a safe drain.
  6. Electrical: Plug controller into a grounded outlet; install battery if recommended for clock backup.

Monthly Checks

  • Inspect the salt level. Keep the tank at least half full, but never fill it to the brim (leave 6 inches of clearance).
  • Use the right salt. High-purity evaporated salt pellets (with less than 1% insoluble matter) prevent your resin from fouling.
  • Clean the brine tank annually. Once a year, empty all old salt, scrub the inside with bleach water, and refill.

The Importance of Water Softeners: What to Do When Your 40278 Water Softener is Full 40278 water softener full

What is a Water Softener?

Keep Salt Levels Lower: 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. Troubleshooting the "40278 Water Softener Full" Error: A

For the Kenmore 40278 Water Softener (part of the 350 series), a "full" tank usually refers to one of two things: either your salt level is at its maximum recommended capacity, or you have a "Full of Water" malfunction. Salt Level Recommendations Location: Install on the main cold-water line after

If your 40278 water softener is full, you may notice several signs, including:

The Cons (Honest Reality Check)

❌ Physical Footprint: The brine tank plus the 40” tall mineral tank will take up about 4-6 square feet of floor space. It won’t fit in a small utility closet.
❌ Installation Weight: A “full” tank weighs over 100 lbs when filled with wet resin. You’ll need a dolly and two people to move it.
❌ Cost: Expect to pay $800–$1,500 for a quality Fleck-based 40278 full system (cheaper off-brands exist, but avoid them).
❌ Overkill for Small Homes: If you have 2 people and moderately hard water, this unit would be inefficient (salt can harden into a bridge between regenerations).