A breaker or fuse that won’t hold means one of two things: You have a serious problem such as a short circuited wire, or you overloaded the circuit,to many devices will make the fuse or breaker blow.First try to eliminate electric devices on that circuit. Appliances that draw to many amps are usually the culprit ( space heaters,irons,hair dryers,window air conditioners, ect.) If the breaker or fuse still blows you have a serious problem on that circuit you need to call an electrician.