Kenmore Dryer Error Code E3

E3 on a Kenmore dryer indicates a keyswitch or software mismatch between the console electronics and the machine control electronics. This code only appears during diagnostic test mode and not during normal dryer operation. It typically means the two control boards installed in the dryer are not compatible with each other, often due to an incorrect replacement part.

Because E3 reflects a hardware or software incompatibility between the two control boards, a simple reset will not permanently resolve the issue. The code will return whenever diagnostic test mode is run as long as the underlying mismatch exists. The correct fix requires confirming and installing the properly matched control components.

Repair costs depend on which component carries the wrong part number. A replacement machine control board typically ranges from around 80 to 200 dollars for the part, while a console electronics assembly can range from 50 to 150 dollars. Adding professional labor will increase the total, generally bringing the repair to somewhere between 150 and 400 dollars depending on the specific parts needed and local labor rates.

If you are comfortable comparing part numbers on control boards, the first step is to verify that both the machine control board and the console electronics assembly carry the correct part numbers for your specific dryer model. If a mismatched part is found, replacing it with the correct component should resolve the error. Further diagnosis per TEST #5 is needed if parts are confirmed correct and the error continues.

Since E3 only appears in diagnostic test mode and not during a normal drying cycle, the dryer may still run loads in the short term. However, a control board mismatch means the machine is not operating with fully verified compatible components, which could affect cycle accuracy or reliability. It is best to address the mismatch before continued regular use.