Dishwasher Repair — Common Problems & Solutions

Dishes Not Getting Clean

When dishes come out of the dishwasher still dirty or with food stuck on them, the wash system is usually not doing its job. Clogged spray arms, weak circulation pumps, low water temperature and incorrect loading can all result in poor cleaning performance. Detergent quality and hard water also play a role in how well the dishwasher can break down and rinse away food residues.

A technician will check spray arm rotation and clogs, measure water temperature and listen to the circulation pump. If the pump is weak or noisy, it may need replacement. In some cases simple cleaning and adjustments restore performance; in others a new circulation pump or updated usage recommendations are required.

White Film or Residue on Dishes

A white film or chalky residue on glasses and dishes can be caused by hard water, too much detergent or poor rinsing. Over time, mineral deposits can build up on the interior surfaces of the dishwasher and on the heating element, further reducing efficiency. Cloudy glassware is a common complaint in areas with higher mineral content in the water.

The technician may recommend specific detergents or rinse aids, verify that the rinse cycles are working properly and check for any issues with water heating. In some cases, descaling the interior and heater helps restore clear results. Adjusting detergent amounts and cycle selection often prevents the residue from returning.

Dishwasher Not Draining

Standing water in the bottom of the dishwasher at the end of the cycle usually means the drain path is blocked or the drain pump is failing. Food particles, glass and other debris can clog filters, pump housings and hoses. A faulty drain solenoid or air gap installation can also interfere with proper draining.

A professional will remove and clean the filters, inspect the sump and pump area, and test the drain pump. The drain hose and garbage disposal connection are checked for blockages. Once the obstruction or failed component is addressed, the dishwasher drains fully at the end of the cycle and is ready for the next load.

Dishwasher Leaking

Water seeping from under the dishwasher, around the door or at the connection points can cause significant damage if left unaddressed. Common sources include worn door gaskets, loose hose clamps, cracked inlet valves or overfilling due to faulty sensors. Sometimes leaks occur only on certain cycles when higher water levels or pressures are used.

The technician will run test cycles, observe where water appears and inspect hoses, valves, the door seal and the tub. Repairs may involve replacing the door gasket, tightening or replacing hoses, fixing inlet valves or addressing issues with the float or level sensors. Timely repair prevents floor and cabinet damage and avoids hidden mold growth.

Dishwasher Not Starting

If the dishwasher will not start, does not respond to buttons or cancels immediately, the cause can range from a faulty door latch or user interface to control board problems. Some models will not run if they detect water in the base pan or if key sensors report an error condition.

A technician will check incoming power, test the door latch and switches, verify control panel operation and look for stored error codes. Depending on the findings, repair may involve replacing the latch assembly, keypad or main control board. Once fixed, the dishwasher can accept cycle selections and run normally.

Loud or Unusual Noise

Grinding, humming or roaring sounds during the wash cycle often indicate worn circulation pumps, foreign objects in the pump housing or failing motors. Buzzing or rattling noises may come from loose panels, spray arms hitting dishes or debris trapped in the filter area.

During service the technician will listen to the machine through different stages, inspect the wash motor and pump, and remove any obstructions. If the circulation or drain pump bearings are worn, the noisy components can be replaced. A quiet, smooth-sounding dishwasher is a sign that all moving parts are working correctly.