Do not use the motor as a drain-unblocking tool. First establish whether water is being intentionally held by a stopper or is failing to leave an open drain.
What the observation tells you
A blocked sink can conceal the disposer opening and any objects inside. Starting the unit may add movement without giving the water anywhere to go. Follow the manufacturer's ordinary sink-draining sequence only when you know the appliance and drain are clear and correctly arranged.
A useful next step
If water has accumulated unexpectedly, keep the disposer off, stop adding water and describe the blockage to the person assessing the drainage. Avoid chemical drain treatments.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.