40278 Water Softener !free!: Full

If the float is stuck in the "up" position or is damaged, it may send a false signal to the control board that the tank is full, or it may fail to shut off the incoming flow during the fill cycle. How to Fix the 40278 Error Step 1: Manual Inspection

Before diving into the "full" status, let’s look at why the 40278 model is a best-seller in the home water treatment market.

: 27,000 grain removal capacity, ideal for small to medium families. Hardness & Iron

: Maintenance kits under this designation typically focus on high-wear elastomer materials. According to DICHTOMATIK , these parts use NBR (Acrylonitrile butadiene rubber) or FPM, which can withstand temperatures from -40∘Cnegative 40 raised to the composed with power C up to +120∘Cpositive 120 raised to the composed with power C .

The injector is a small component inside the valve head that creates suction to draw the brine into the main tank. 40278 water softener full

Unscrew the cap carefully, making sure not to lose the internal gaskets, screen, and tiny plastic parts.

If you’ve walked past your water softener lately and noticed the brine tank (the one with the salt) looks like it’s overflowing, you’re not alone. It’s one of the most common service calls homeowners make. Seeing water where there should mostly be salt—or seeing water sitting higher than usual—can be alarming.

every four months helps remove iron and scale buildup from the resin bed, extending the parts warranty up to 5 years. Troubleshooting "Full" Tank Issues

To prevent issues with your 40278 water softener and ensure optimal performance: If the float is stuck in the "up"

If your water suddenly feels hard again and the display says "FULL," here is how to fix it.

The system's digital control valve monitors water usage and initiates an automatic regeneration cycle when needed. This cycle performs several key functions:

For the 40278, set the hardness 2-3 grains higher than your test result to account for iron. (Example: If you have 15 gpg hardness, set the unit to 18 gpg).

This comprehensive troubleshooting guide will explain why your water softener tank is filling to capacity, provide step-by-step DIY repair solutions, and clarify when you need to purchase replacement parts from Sears PartsDirect . Understanding the Brine Tank Water Level Hardness & Iron : Maintenance kits under this

An error code like or a "full" brine tank status typically indicates that your water softener has failed to drain properly during its regeneration cycle. This often leads to standing water that covers the salt entirely, preventing the system from producing soft water. Quick Troubleshooting Guide

Morton Ultra 27,000 Grain Water Softener (Model M27) , often identified by its part or reference numbers like

You should also periodically use a water softener cleaner or resin cleaner. This helps remove any organic or iron build-up on the resin beads, which can reduce the system's softening efficiency over time. It is generally recommended to use a resin cleaner at least three times a year.