Model Number: KERC608LSS0
Brand: KitchenAid
Age: More than 10 years

My KitchenAid electric range model #KERC608LSS0 touch pad's is dead, but all functions still work. I found two replacement parts: 1) Relay Control Board (#WP9782437), 2) Control Board (#WP9782455). It seems that 2) includes 1) and it is much more expensive. Do you know which of the two parts I need to get to solve my problem? Again, all functions in the touch pad work, it's just it is all black. Tks, Victor