Dirty brushes will do that every time, since the pump's outside all summer in the elements, dirt and moisture is a common factor, after winter storage, likely some oxidation buildup happened on the brushes and when you first fire it up, it doesn't allow for the startup current needed to pass through since they are somewhat insulated by the buildup and oxidation.
What your husband did is the right thing to get it going, this will likely happen every spring, once it runs for a bit the contacts will clean off again and you should not have any issues over the summer, just remember it for next spring.
After 4 years, you probably should check the brush condition, they could be getting low, and replacing them before total wearing could save you a few $ in other repairs or complete pump replacement - brushes are cheap and really easy to do.