Have a look behind and check that no hose is kinked. Other than that, when was the last time you checked the filter? On most front loader, the filter is down the bottom on the front panel ‘s right hand side, on most top loader, it’s at the back near the drain hose’s connection. Open the plastic cover, unscrew the cup and remove anything blocking the water flow. You’ll be surprised to find a wide range of unexpected items such as hair pins, coins, nails, lint, etc.