Flame, you can send the timer back to TH, and they'll test it for you. If you decide to go with another timer, make sure it can control both motors. Since it's only spinning one plate, I'm not sure a timer on a corn feeder will work.
First thing I would do is replace the battery, and if you have a solar charger, be sure and disconnect it from the timer also. The second thing I would do is make sure the throw wheel isn't binding. Food dust accumulates between the wheel and the housing, and it can drain a battery in a few days. I had a TH feeder that worked intermittently because of the dust.
