Maytag Electronic Clock and Oven control

The electronic clock and oven control on my maytag electric range is acting up. When I try to set the oven temp, broiler temp,clock or timer the settings jump e.g. I set the oven to 350 and the display jumps from 350 to 345 to 355 and then will lock on, but not usually at the exact temp I want. Everything else on the range works fine. Do I need to replace the control or could it just be dirty? Is it hard or expensive to replace? Thanks for the hlep!

Frank