Can you get me the model # XXXXX? It is located inside the door.
When you tried to start it before would the unit make a humming noise or nothing?
Do you think that when you were playing with timer to get it to start before it had an affect on it strarting?
Sorry. I think it would be best the have a tech out to find out if it is the timer or the motor. I feel it will be the timer from what we have gone over but there is a chance that the motor is going bad. If the unit is more than 10 years old it maybe time for a new unit as either of the repairs are not cheep.