I recall this old sci fi movie where a android is looking for its' "father", it will self destruct if not found in 7 days. The father knows how to defuse the H-bomb in it. Then it goes on to save humanity
Probable duplicate of this question; Film about alien/android that molds facial features. The Questor Tapes, created by Gene Rodenberry. Robert Foxworth stars as the android, who needs to find his father/creator, who can defuse his nuclear generator before it overloads and explodes.He becomes the current guardian of humanity
On the off chance you're confused about details (or someone else is looking for a film about an android looking for their creator while they have a bomb in them), I'm going to propose Eve of Destruction, a 1991 film about a gynoid named EVE VIII designed for military operations and looking identical to her creator, Dr. Eve Simmons. EVE is damaged during a bank robbery, which triggers embedded memories from her creator, and a desire to seek out Dr. Simmons's father, who was abusive to her as a child. EVE indeed does have a nuclear bomb in her, which must be disarmed, triggered to go off within 24 hours after she gets into a car crash.
Areas where it doesn't match up are a later time frame, possibly a different gender for the android, and that the father and creator are different people. Also, EVE doesn't go to save humanity, but defeating her does save a significant part of the population around her.