The F90 error code indicates that the maximum oven door unlock time was exceeded. The control applied voltage to the oven door lock assembly motor to unlock the oven door but a component failure or mechanical problem prevented the door from unlocking.
You could have a bad door lock assembly, a wiring failure or a problem with the electronic oven control board that prevented the oven from unlocking. You can
unplug the range
and check the wiring connections on the control board and the door lock assembly using the information shown in the images below. To access these components (with the range
), remove the back panels of the range. Check the wire harness connections between the electronic oven control board in the console and the door lock assembly on the back of the range (wires are traced in colors on the diagram below). If you find no wiring problems, I recommend that you replace the door lock assembly. The part number for the door lock assembly is 316464300. Here is a direct link to that part on the Sears PartsDirect.com website:
If you replace the door latch assembly and have the same problem, then the electronic oven control board (part 316462853) will probably need to be replaced.
These tips should help you fix this problem. If you need more assistance, reply with additional details.
If you do not feel confident repairing this problem yourself, then you can have it repaired by a Sears technician. Here is a link that will provide the nearest drop-off locations:
Sears Home Services