i didn't mean to be offensive

if i were in your place i would have changed the batteries right away. temperature is vital to the snake, and not being able to monitor it is in my opinion not taking care of the animal.

you came here for help. i am sure i am not the only one that would have told you you need to ditch the dials and get batteries. temperature being off could be the cause of going off feed. you said you had trouble getting the hot side hot, well how are you heating it? are you using a UTH, if so do you have something monitoring it (thermostat, rheostat)? a UTH can fluctuate in temperature, so just cause it was that temp last time you checked doesn't mean it's that temp now.

check out the care sheet and make sure your husbandry is all up to par. going off feed is most likely caused by husbandry being off.