I have a Hayward prowerflow matrix 1.5 horsepower pump for an above ground pool. It is taking in air as the basket doesn't completely fill with water. The motor also seems to be running a little hot. Not sure what the problem is.
More than likely you have a suction side air leak. Your next best option right now would be to check everything listed on the TFP Pool School - Suction Side Air Leaks page, paying particular attention to the pump strainer basket lid's O-ring. The pump basket should be full of water when running well.
If this is new since starting-up after winter, also ensure all valves are open, water level is high enough in the pool, and that you don't have any obstructions in your suction line(s).