Seven years is the actual design life of all submersible pumps/motors. They can usually take about 7 year of cycling on and off before they are destroyed. When running water outside your pump is probably cycling pretty fast, which is now causing the overload in the motor to trip. These are auto resetting overloads and will cool off and restart the motor in a minute or two. The longer it takes for the motor to come back on, the hotter the overload was when the pump went off.
Stopping the pump from cycling by adding a Cycle Stop Valve will make it last 3-4 times longer than the planned obsolescence time of 7 years. Adding a CSV now will stop the destructive cycling. But it cannot help with the 7 years of damage already on the pump. When the overloads start tripping, it is just a matter of time before it won't reset and water stops coming out of your faucets until you get a new pump.
