Kenmore Waterheater Error Codes

All Kenmore waterheater error codes with step-by-step troubleshooting, multimeter specs, and OEM part numbers.

5 error codes

Code	Meaning	Severity	Difficulty
ERR 01	When Err 01 fires, the control board timed out waiting for the position switch to confirm the valve motor moved to its home position. It gives the motor about three minutes. No signal comes back, it throws the code and stops the regeneration cycle dead in its tracks. moderateintermediate	moderate	intermediate
ERR 01	The control board commanded the valve motor to rotate to its home position, but the position microswitch never confirmed it got there. Basically the board's waiting on a signal that never came, so it throws the code and shuts down the cycle. moderateintermediate	moderate	intermediate
Err 03	The control board sent a command to rotate the valve motor but didn't get the confirmation signal back from the position microswitch in time. It can't verify where the valve is sitting, so it stops everything and throws Err 03 to prevent running a cycle in the wrong position. highintermediate	high	intermediate
Error 3	Error 3 means the control board sent the valve motor on a mission and never got confirmation it arrived. The cam gear is supposed to trip a small microswitch at a specific position, sending a signal back to the board. That signal never came. Board waits a few minutes, gives up, throws the code. moderateintermediate	moderate	intermediate
NOT-SOFTENING	The resin bed isn't regenerating properly, so hard minerals like calcium and magnesium are passing straight through to your taps. Usually it's because the system can't draw brine up from the salt tank, either from a blockage or a broken mechanical part in the valve head. moderateeasy	moderate	easy