I have a Kenmore Elite oasis dryer,I went to start dryer up and F40 came popped up and keep flashing

Broken belt?

Check lint filter, check vent outlet at dryer, and continue on through vent checking for lint to the exit area of the vent. Keeping the vent lint free saves energy and reduces drying time.

go to google and you can find out if there are any recalls

Kenmore Elite HE3T DLF or Error Code Fix Washer Front Load

Sears Kenmore Elite oasis dryer error YouTube

Press and hold the "Start" button to restart the dryer cycle if the "PF" (power failure) error code appears. This code often appears when a cycle is interrupted before it completes. You may also check the breaker or household fuse, and ensure the machine has not come unplugged.


Read more: How to Repair Kenmore Elite Oasis Dryer Error Codes ' eHow.com http://www.ehow.com/how_7703883_repair-oasis-dryer-error-codes.html#ixzz1u

F40 is a error that appears between the machine control and the motor control when communication becomes lost. I had this same issue. My dryer would run and heat up but then stop and give me the f40. I measured all thermisters and everything was in range. The tech sheet stated that I needed to buy a new control board and I did. Same problem.
The solution was a loose connection on for p4. I took needle nose pliers and squeezed the connector to make it fit tight on the board and everything is working now.
Bottom line, expensive dryer with cheap connectors.

F40 = thermal fuse blown.
If the fuse is OK the error points to a communication problem between the machine control board and motor control board (check connectors).

Get the model number and go to:

http://www.searspartsdirect.com/partsdirect/modelHelp.pd?pop=flush&modelNumberId=18

The F40 code can mean a thermal interrupt or a loss of connection between the control circuit board and the motor circuit board.

Perito posted this on askmehelpdesk.com:

I found two possibilities for an F40 code.

1) Error Code F40 is that the thermal fuse has blown.
2) The F40 error code is a communication problem between the machine control board and motor control board. A bad connection might or might not cause this.

If you post your model number, or download the owner's manual from the above link, you'll probably find out what it means, at least.

repl/ main control board reason for error code F 1 ,,,nothing else

If it's not listed in the rear of your manual??? Then you will need a Technician. Let me know if you find the solution in your book.