Your washer won’t drain? There are several reasons for this very common issue.
The washer drains out the water, but does it very slowly, then goes dead.
The washing cycle breaks at a spin and drain cycle, and the water stops draining.
The washer does drain out the water, but not at each washing cycle.
The water is drained out only during the washing cycle, but not during the rinse cycle.
The washer goes dead after the water is drained out.

The drain pump filter is clogged.
The sump hose is clogged (the hose connecting tub with the pump).
There is an obstruction inside the pump, the impeller got jammed.
The pump failure.
The drain hose is clogged.
The interceptor or waste pipe is clogged.