Need Appliance Repair Help? Ask a Technician for Answers ASAP
F90 is a communication error with the display control board, just order and replace the display board and you'll be good to go again. Below is a link to the part you'll need to order for your model.
CLICK HERE for display board
We are on the honor system here. Please remember to rate my service by selecting a star at the top of the screen before you leave today. If you need anything else, just let me know. You can continue asking follow-up questions at no additional charge after rating my service if you still need assistance.