Hi George I have had the same solenoid for over 8 years with out all the fancy lights & buzzer And NEVER had a problem.
Maybe you should get away from all the bells & whistles and Double solenoids and go with just One Solenoid it just might be the trick. Simple is better & cheaper. Merry Christmas Al In a time of deceit telling the truth is a revolutionary act. In a time of deceit telling the truth is a revolutionary act. -George Orwell-

