Aquarium pump no longer pulls water after last tank cleaning. Why?

I have a Marineland System 3 aquarium... After the last water change/cleaning, the pump refuses to pull up any water. It makes noise, but refuses to pull water. Anyone know why? or how to fix this?Aquarium pump no longer pulls water after last tank cleaning. Why?It may need to be primed. You might need to get something to fill the pump with water. Get a cup and take water from the tank and pour it into the pump. If it keeps running and it isn't primed, it could burn the motor out. It could be dirty. Did you clean it? It could be the impeller needs to be given a jump start. You can do this by getting something and slightly hitting it. I usually use a pipette and just poke it a bit. The impeller spins like a windmill, but sideways, and sometimes it stops spinning so it needs something to tap it so it starts again. I use something plastic or wooden so there's no chance of getting shocked.Aquarium pump no longer pulls water after last tank cleaning. Why?sometimes you need to take the powerhead apart and clean the impeller. check it to make sure its not broken and put it back together. I hold mine in a bowl of water sometimes to make sure it works. sometimes it needs a tap because mine is missing a paddle. Make sure you fill the filter with water and check that the intake pipe is in tightly so suction isn't lost.