2004 trailblazer dual climate control issues

I have a 2004 Trailblazer with the dual climate control knobs and the digital temp readout for both sides. When turning the knobs to adjust the temperature settings the digital readout jumps around. Usually I am trying to turn up the temp and its keeps going backwards. It does this for both sides. Any suggestions?

Welcome to AF, the control head could be bad, it need to be scanned with a Tech11 type scanner that can get into the bcm.