A dishwasher that smells unpleasant is one of those domestic nuisances that tends to build gradually — a faint odour after one cycle, something more noticeable the next, until eventually opening the door becomes an unwelcome experience. The good news is that most dishwasher smells have identifiable causes and are either resolvable at home or through a professional repair. Appliance Repair Men provide appliance repair in Ormskirk and across the surrounding service area, and dishwasher repair is a core part of what they do.
What Is Causing the Smell in Your Dishwasher?
Dishwasher odours are almost always caused by organic matter decomposing somewhere inside the machine, by a drainage fault that is allowing water to stagnate, or by build-up in components that are not cleaned as part of the regular wash cycle. Identifying which of these is the source will tell you whether a clean is likely to help or whether a fault is contributing to the problem.
Food Debris in the Filter
The dishwasher filter is designed to trap food particles so they do not recirculate through the spray arms during the wash. If the filter is not cleaned regularly, the trapped food debris begins to decompose and produces a distinctly unpleasant smell that intensifies every time the machine runs. On most dishwashers the filter is located at the bottom of the machine beneath the lower spray arm and is straightforward to remove, rinse under running water, and replace. This should be done every two to four weeks depending on how heavily the machine is used. If you cannot remember the last time you cleaned the filter, that is almost certainly where the smell is coming from.
The Spray Arms
The spray arms have small holes through which water is forced during the wash cycle. Over time these holes can become partially blocked with mineral deposits and small food particles, preventing the arm from rotating and distributing water effectively. Standing water inside a spray arm between cycles can also become stagnant and contribute to odours. Most spray arms on domestic dishwashers can be removed without tools and rinsed under running water — a thin piece of wire or a cocktail stick can be used to clear individual blocked holes. If the spray arms are cracked or heavily fouled, replacement is straightforward on most models.
A Drainage Issue Allowing Water to Stagnate
If the machine is not draining completely at the end of each cycle, a small pool of water sits at the bottom of the machine between uses. This stagnant water quickly develops a foul smell, and because it is heated and cooled repeatedly with each subsequent cycle, the odour compounds over time. A partial drainage problem may not be immediately obvious — the machine may appear to complete its cycles normally — but if the smell is particularly bad and accompanied by a small amount of standing water at the bottom of the machine after a cycle, drainage is very likely involved. Residents in Maghull dealing with a smelly dishwasher alongside drainage issues can arrange dishwasher repair Maghull for a professional inspection.
The Door Seal and Hinge Area
The rubber door seal creates a watertight closure around the door opening, and its inner folds can trap food residue, detergent deposits, and moisture. This area is frequently overlooked during routine cleaning because it is not as visually obvious as the filter. Wiping the door seal thoroughly with a damp cloth — paying attention to the folds and the bottom edge where residue collects — is a simple but effective maintenance step that makes a noticeable difference to dishwasher odours. The hinge mechanism at the bottom of the door can also collect debris and moisture, so giving this area a wipe as part of a regular clean helps keep odours under control.
Running a Hot Cleaning Cycle
Running the dishwasher empty on its hottest programme with a dedicated dishwasher cleaning product once a month is one of the most effective ways to prevent odour build-up. The combination of high temperature water and a cleaning agent flushes through all the internal components and helps remove grease, detergent residue, and bacterial build-up that accumulates with regular use. This is a particularly important habit if the machine is used frequently or if the household produces a lot of fatty or protein-rich food waste that goes into the machine.
When the Smell Points to a Fault That Needs an Engineer
If you have thoroughly cleaned the filter, spray arms, and door seal, run a hot cleaning cycle, and the smell persists — particularly if it has a sewage or rotten quality — there may be a fault with the drainage that is allowing contaminated water to remain in the pump housing or the internal hoses. This is not something that can be addressed with cleaning alone and requires a professional inspection. To book a dishwasher check anywhere across the service area, call 01695 768 738 or visit the get in touch page.
