Maytag Neptune but does not spin. Intermittent failure.

[1gregp]

We replaced the R11 resistor, triode and wax motor a few months ago. The washer worked properly after the repair. Recently the washer will complete a cycle without spinning out the water. In all cases the front door is locked (red light is on). This is an intermittent failure that seems to be occurring more frequently. Can you suggest some diagnostics

Model MAH4000

[JWWebster]

clogged pump/slow drain/kinked drain hose