Quick pump troubleshoot

Start with the power and motor. When it's plugged in is there a noise or vibration? Smoke or burning electronic smell? If there is noise or vibration the pump motor is in working order. If it is still not pumping move to the next step.

Now for the impeller, gently turn it. Did it move? Is the turn rough or sticks? With pumps smaller than 1/8hp you can try carefully turning the impeller while powered on to get it spinning. Larger pumps this is not recommended.

Next check the hose fittings and the pumps seals. Are any fittings lose? Run water around the seams while the pump is running, carefully avoiding the motor and any electronics, if the pump starts to prime as you are running the water you have located the bad seal.