Roughly fifteen minutes into a typical cycle, the detergent door pops open and the real cleaning begins — hot, soapy water sprayed under pressure across every dish in the rack.
The detergent door is held shut by a small latch. Depending on the model, it's released by a wax motor that softens with heat, a bi-metal trigger, or a solenoid fired by the control board.
Timing matters: if the door opens too early the detergent gets washed away during the rinse; if it opens too late the dishes don't get clean.
The circulation pump keeps running and now pushes a mix of hot water and dissolved detergent through the spray arms. Enzymes in modern detergents break down protein and starch residue while surfactants lift grease off surfaces.
On models with a third rack or extra wash zones, a diverter valve sends water to different spray arms at different times to give every rack adequate coverage.
Food chopped off the dishes is either ground up by a chopper blade or caught in a filter at the bottom of the tub so that the same water can be reused throughout the wash without redepositing soil on the dishes.
When the wash time is done, the drain pump empties out the dirty, soapy water in preparation for the final rinse.
Match what you're seeing or hearing to the likely root cause — then give us a call.
Tell us what it's doing — we'll get it sorted, often the same day.