If your dishwasher is new or recently installed, check the disposal inlet. There is often a plastic knockout plug left inside the disposal where the hose connects. If you see a hole but the hose won't drain, poke inside the disposal inlet with a screwdriver to ensure that plug isn't blocking the flow.
Unplug the dishwasher or turn off the power at the circuit breaker. You will be dealing with water and electrical components, so this step is non-negotiable. how to clean dishwasher drain hose
If your dishwasher is new or recently installed, check the disposal inlet. There is often a plastic knockout plug left inside the disposal where the hose connects. If you see a hole but the hose won't drain, poke inside the disposal inlet with a screwdriver to ensure that plug isn't blocking the flow.
Unplug the dishwasher or turn off the power at the circuit breaker. You will be dealing with water and electrical components, so this step is non-negotiable.