Seven major causes of dishwasher Malfunctions and Their solutions

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Dishwashers are prone to malfunction during use, which not only affects usage but also leaves people helpless. Here I have compiled the causes of seven common malfunctions and simple solutions to help you fix the problem quickly.

1. Drainage system failure

Cause of failure: Clogged drain pipes are often caused by the accumulation of food residue and grease; Drainage pump failures usually result from aging of the motor coil, jamming of the impeller, or entanglement of foreign objects; Fouling of the filter is due to long-term lack of cleaning, where scale mixes with food debris to form a blockage.

Solution: To clean the drain pipe, remove the end bend and use a pipe unclogging tool to clear the blockage inside; Drainage pump maintenance requires disassembling the pump body after disconnecting the power supply, clearing foreign objects from the impeller and testing the resistance value of the motor (normal range 50-200Ω); The filter is recommended to be soaked in citric acid solution for descaling every month, and the filter screen holes should be cleaned with a soft-bristled brush.

2. Inadequate cleaning results

Cause of failure: Clogging of spray arm holes is often caused by scale crystallization or food particles; An insufficient amount of detergent directly affects surfactant concentration; A malfunction of the heating element causes the water temperature to fail to reach above 60 ° C, which affects the emulsification effect of the oil.

Solution: For cleaning the spray arm, use a fine needle to unclog each spray hole and use a special descaling agent for monthly circulation cleaning; Detergent should be added strictly in accordance with the instructions to avoid excessive foam residue; The heating element should be tested with a multimeter to measure the resistance value. The normal value should be 20-50Ω. If it is abnormal, the heating tube should be replaced.

3. Abnormal noise

Cause of failure: Motor bearing wear or blade deformation can cause vibration during operation; When the spray arm installation is loose, high-speed rotation will strike the inner wall; Improper placement of cutlery such as with the bowl mouth facing up or overlapping cutlery can cause collision noise.

Solution: Motor maintenance requires professional disassembly, replacement of worn bearings or alignment of blades; Check the tightness of the screws when fixing the spray arm to ensure smooth rotation without shaking; Tableware should be placed in accordance with the principle of "large items facing down and the rim of the bowl tilted at 45°" to avoid direct contact between tableware.

4. Leakage issues

Cause of failure: The aging of the door seal strip is manifested as rubber hardening and cracking, resulting in seal failure; The aging of the inlet pipe is manifested as embrittlement and cracking of the pipe wall; A displacement or aging of the sealing ring at the connection of the drain pipe can cause leakage.

Solution: Replace the door seal with the original factory model and apply special sealant during installation; It is recommended to replace the inlet pipe every two years and check the pipe body for cracks on a daily basis; Retighten the clamps at the drain pipe connection and replace the aged seals.

5. Unable to start

Cause of failure: Power failures include poor socket contact, blown fuses; Failure of the door lock microswitch can cause the safety circuit to break; Control panel failure may involve damage to the program chip or oxidation of key contacts.

Solution: For power supply inspection, test the socket voltage (220V±10%) and replace the fuse of the same specification. For door lock inspection, use a multimeter to test the on-off status of the microswitch and replace it if it is abnormal; To restart the control panel, try power-off for 30 seconds and then power-on again. If it still doesn't work, contact after-sales for system reset or motherboard replacement.

6. The door seal has failed

Cause of failure: The aging of the door seal is related to the high temperature and high humidity environment, and the rubber material will gradually harden and lose elasticity; Improper installation causes the door seal to twist and deform, affecting the sealing effect; Door body deformation is often caused by external impact or uneven force over a long period of time.

Solution: Use neutral detergent to clean the door seal and avoid using strong acids or strong alkalis; Make sure the door seal fits the door frame evenly without any local lifting during installation and adjustment; If the door body is deformed, contact a professional for inspection. If necessary, calibrate the door frame or replace the door body components.

7. Unpleasant smell inside

Cause of malfunction: Food residue remaining in the inner cavity can breed bacteria and produce a putrid smell; Water at the bend of the drainpipe can breed mold; If the filter is not cleaned for a long time, it will cause oil to accumulate and ferment.

Solution: The inner cavity should be cleaned with a dedicated cleaner and a deep cleaning should be done monthly; The end of the drain pipe needs to be cleaned regularly to keep the drainage unobstructed; The filter should be cleaned by soaking it in baking soda water weekly, using a soft-bristled brush to remove grease, and then reinstalling it after drying.

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