[i have crabs]

i have a few of them but never really had any problems, i assume you have the digital ones?
i would just check all the stttings makeshure you have the mode on auto and it set too run on all 7 days and make shure all 7 days are programed with the right hours, ive accidently got the am and pm mixed up once or twice and 1 day a week the fish did an all nighter