Thank you for contacting ManageMyLife.com regarding the F40 error code on your Kenmore Elite Oasis dryer. I know error codes can be frustrating and I am happy to help you today.
The F40 error code indicates
the communication between the machine control board and the motor control board is lost.
This a problem I'd recommend having a technician check and repair.
If you wish to try something before calling for service, you can access the controls and check the harness connections on the control board. Pulling and pushing on the connectors might give a better connection. The images below also contains testing information and how to access the controls.
Remember to unplug the dryer first. Parts can be purchased from
If there is no improvement then, I recommend having a technician come out to diagnose and repair this problem. If you do not feel confident repairing this problem yourself, service can be scheduled at the following link:
Sears Home Services
I really hope this information helps you today. Thank you for using ManageMyLife.com.