While modern Fleck-based systems use codes like "40278" to indicate long periods without regeneration, Kenmore units typically use codes like Err 01 or Err 03 to signal motor or sensor failures. Replacements & Parts Kenmore ® 350 Water Softener
You have three likely culprits:
Soft Water Made Simple: A Guide to the Kenmore 420 (40278) Water Softener 40278 water softener
"Get a workhorse," Cletus had grunted. "Don't get the pretty plastic ones. You got the water of a limestone quarry coming through them pipes. You need iron and grit." While modern Fleck-based systems use codes like "40278"
| Feature | Specification | | :--- | :--- | | | Dual mineral tanks (alternating) | | Control Valve | Hague Quality Water patented microprocessor | | Service Flow Rate | 12–18 GPM (gallons per minute) | | Peak Flow Rate | 22 GPM | | Resin Capacity (Total) | 2.0 – 2.5 cu. ft. (depending on variant) | | Brine Tank Size | 18" x 33" (includes safety float) | | Inlet/Outlet Ports | 1" NPT (female) | | Power Requirement | 110V / 60Hz (low voltage transformer) | | Dimensions (Control head) | 10" W x 12" D x 14" H | You got the water of a limestone quarry
But is it just another appliance, or does it truly solve the hard water problem? Let’s break down the specs, performance, and what real users are saying.