Fix a broken water pump in a pond for healthy fish and a healthy water pond. The pond also looks beautiful because the pump removes dirt and debris from the water and circulates clean water that is better for the pond and its denizens. A malfunctioning pump can be diagnosed by following a few tips, which helps you determine whether the pump is fixable or if you need a new one.
Look for the source of the power supply to your pond pump. Check the circuit breaker to see if it is in the "On" position. If not, flip it on.
Check the pond pump to see if it is submerged correctly. There is a thermostat that forces the unit to shut down when it gets too hot, which it does if it is not submerged sufficiently.