Why Your Washing Machine Smells and What to Do About It in Andover

Published September 2026 | washing machine smells bad how to clean it

Pulling clean washing out of the machine only to find it smells musty or even rotten is deeply unpleasant - and if you've never dealt with it before, it's natural to wonder whether something is seriously wrong with your appliance or whether you've caused the problem. You haven't. This is one of the most common issues our engineers hear about across Andover and the wider Hampshire area, and in the majority of cases it's completely fixable - often without needing a professional visit at all. Let's walk through what's going on and what you can do about it.

What Is Actually Happening - The Basics Explained Simply

A smelly washing machine is almost always caused by a build-up of bacteria and mould inside the appliance. Here's why it happens.

Modern washing machines are built for energy efficiency, which means they use lower water temperatures for most cycles - commonly 30 or 40 degrees Celsius. The problem is that bacteria and mould thrive at those temperatures. Over time, soap residue, fabric softener, fluff, and debris accumulate inside the drum, the rubber door seal, the detergent drawer, and the pump filter. Hampshire has moderately hard water in many areas, which also accelerates limescale build-up on the heating element. That mix of residue, limescale, and damp warmth creates the perfect environment for bacteria to grow - and the smell you're noticing is the result.

Front-loading machines from brands like Bosch, Samsung, LG, Hotpoint, and Beko are particularly vulnerable. The rubber door seal has deep folds that trap moisture and grime, and the drum rarely dries out fully between washes. Top-loading machines drain more naturally and tend to suffer less, but they're not immune either.

The type of smell gives you useful clues. A musty or damp smell points to mould. A rotten egg or sulphurous smell suggests bacteria in the drum or drain hose. A sewage-like smell from behind the machine might actually be your plumbing rather than the appliance itself. Pay attention to what you're smelling before you start, because it shapes what you check first.

Is This an Emergency or Can It Wait?

In most cases, a smelly washing machine is not an emergency. It's a maintenance issue that has built up gradually and won't cause immediate harm to you or your home. That said, a few situations need faster action.

Get in touch with an engineer promptly if:

• The smell is accompanied by water not draining properly - this suggests a blocked filter or a failing pump
• Clothes are coming out with black or brown marks on them, which indicates mould is transferring from inside the drum
• There is a burning smell - this is very different from a mildew smell and could point to an electrical or motor fault
• You can see mould spreading into the drum itself, not just on the visible surface of the seal

If it is simply an odour with no other symptoms, you have time to work through the checks below. Most people in Andover who tackle the basic cleaning steps find the smell resolves completely without needing a professional visit.

What You Can Safely Check Yourself (With Zero Experience)

You don't need any technical knowledge to do these checks. Work through them in order and give each one proper attention.

1. Clean the door seal
Pull back the rubber gasket around the door opening and look inside the fold. This is the number one culprit for washing machine smells. You'll often find black mould, built-up grime, and standing water sitting in there. Wipe it out thoroughly with a damp cloth and a little washing up liquid. For stubborn mould, a solution of equal parts white vinegar and water works well. This should become a monthly habit.

2. Clean the detergent drawer
On most machines, the detergent drawer slides out completely. Remove it and rinse it under the tap. You'll likely find hardened detergent and possibly mould in the compartments. Use an old toothbrush to scrub them clean, and also clean the cavity the drawer sits in - mould in that recess is easily missed and frequently part of the problem.

3. Clean the pump filter
This is the thing most people don't know exists. On front-loaders, there's usually a small access panel at the bottom front of the machine. Behind it is a filter that catches fluff, coins, and debris before they reach the pump. If it has never been cleaned, it will smell terrible. Put a towel on the floor, unscrew the filter slowly - water will come out - and rinse it thoroughly under the tap. Check your machine's manual for the exact location, or search your model number online if you can't find the manual.

4. Run a drum clean programme or hot wash
Many modern machines from Bosch, Hotpoint, and Samsung have a dedicated drum clean programme. If yours has one, run it. If not, run the longest, hottest cycle available - typically 90 degrees - with the drum empty. Add a washing machine cleaner tablet, or pour 500ml of white vinegar directly into the drum. This kills bacteria and flushes residue from the heating element and internal hoses.

5. Leave the door ajar after each wash
This is the simplest and most effective preventive measure. Leaving the door open a few centimetres after each wash lets the drum dry out and stops mould from establishing itself. If the machine is in a cupboard that needs to stay shut, try leaving the detergent drawer slightly open instead.

If the smell is still there after working through all of the above, it's time to bring in an engineer. Something deeper in the system - a deteriorating hose, a failing pump, or heavy limescale on the element - won't respond to surface cleaning alone.

How to Find a Trustworthy Engineer in Andover

Finding a reliable appliance engineer in Andover is mostly a case of knowing what to look for.

First, confirm the engineer works on your specific brand. Not everyone covers every make, and fault patterns differ significantly between an LG and a Beko. A specialist will diagnose the issue faster and is more likely to have the right parts available without a lengthy wait.

Second, look at local reviews. Google reviews and local Facebook community groups are solid starting points. Word of mouth carries real weight in a town the size of Andover, and consistent recommendations from people in your area tell you more than a polished website ever will.

Third, consider using a platform that vets its tradespeople. Voltrade's GoFIX diagnostic tool lets you describe your problem in plain language, matches you with experienced local engineers who have the right knowledge for your specific fault, and provides a ballpark estimate before anyone visits your home. No cold calling, no uncertainty on cost.

Be cautious of any engineer who won't give a rough estimate before visiting or who requests a large upfront cash payment. Reputable engineers will tell you what they intend to check and give you a realistic cost range before beginning any work.

What a Repair Visit Looks Like (So You Know What to Expect)

If this is your first time having an appliance engineer come out, knowing what the visit involves takes a lot of the uncertainty away.

Initial conversation: The engineer will ask about the problem. Be specific - when the smell started, what it smells like, whether you've noticed drainage issues or unusual sounds. The more detail you give, the faster they can identify the likely cause.

Visual inspection: They'll check the door seal, detergent drawer, pump filter, and drum. Most engineers will also pull the machine away from the wall to inspect the drain hose connection at the back, which is a common source of both odour and drainage problems.

Diagnostic checks: Depending on what they find, they may run a test cycle to check drainage and listen for mechanical issues. Many engineers carry equipment that reads error codes stored in the machine's control board - these can point directly to a failing component even when the machine appears to be running normally.

Findings and options: A good engineer will explain what they've found in plain language, tell you whether it can be fixed on the day or whether parts need ordering, and confirm the total cost before doing anything further. You're never obligated to commit on the spot.

Most call-outs in Andover take between 45 minutes and an hour and a half, depending on complexity. If parts need to be sourced, a return visit is typically arranged within a few days.

Typical Costs - So You Are Not Caught Off Guard

Here is a realistic breakdown of appliance repair costs in Andover and Hampshire in 2026.

Call-out or diagnostic fee: Typically between 50 and 90 pounds. This covers the visit and inspection regardless of whether any repair goes ahead.

Basic service and clean: If no parts are required, a professional clean and service commonly runs between 60 and 120 pounds all in, including descaling, filter cleaning, and a test run.

Pump replacement: A failing drain pump is a common cause of both persistent smells and poor drainage. Parts and labour typically cost between 90 and 160 pounds.

Door seal replacement: When the rubber gasket is too contaminated to clean, replacing it typically costs between 80 and 150 pounds including parts and labour.

More complex repairs: Drum bearings and control board faults sit at the higher end, typically 150 to 300 pounds. At that level, ask your engineer directly whether the repair makes financial sense given the machine's age and condition.

As a general guide, if a repair quote comes to more than half the price of a comparable new machine, it's worth considering a replacement. Budget to mid-range washing machines in the UK commonly cost between 250 and 550 pounds new.

Questions You Should Ask Your Engineer

Any engineer worth using will be happy to answer these before or during the visit.

• What exactly is causing the smell, and can you show me? Ask them to point out the problem directly so you can see it for yourself.
• Is this repair worth doing given the machine's age? A reliable engineer will give you an honest view rather than pushing for a repair that doesn't add up financially.
• Are the replacement parts original manufacturer parts or compatible alternatives? Both can work well, but you should know which you're getting.
• Does the repair come with a guarantee? Many reputable engineers offer a 30 to 90 day guarantee on parts and labour.
• What can I do to stop this happening again? How thoroughly they answer this tells you a lot about the quality of service you're receiving.

First-Timer Questions

Why does my machine still smell even though I clean it regularly?

There are spots that are easy to overlook. The pump filter is one of the most commonly missed - if it has never been cleaned, it can hold months of trapped debris and bacteria regardless of how clean the rest of the machine looks. The cavity behind the detergent drawer is another frequent blind spot. Add a drum clean tablet to your routine once a month, make sure you're cleaning inside the seal fold rather than just the visible surface, and check the filter every couple of months. If the smell continues after covering all of that, the problem is likely inside the hose or pump and needs an engineer.

Is it safe to keep using a smelly washing machine?

In most cases, yes. A musty or mouldy smell is unpleasant but won't make your clothes harmful to wear. The more practical concern is that mould and bacteria can transfer to fabrics during the wash, which matters more if anyone in your household has allergies or a weakened immune system. The clear exception is a burning smell - that means you should unplug the machine immediately and call an engineer, as it could indicate a serious electrical fault.

Can I use bleach to clean my washing machine?

You can, but use it carefully. Around 100ml of household bleach added to the drum and run on a hot empty cycle is effective at killing mould and bacteria. Don't use it too frequently though - bleach can degrade rubber door seals over time. Never mix bleach and white vinegar; the combination produces harmful fumes. For monthly maintenance, dedicated washing machine cleaners like Dettol Washing Machine Cleaner or Calgon are the better choice, as they're formulated to be safe for all internal components.

My machine is less than two years old. Why does it already smell?

Age isn't really the main factor here - habits are. The most common causes in newer machines are consistently low-temperature washes and using too much detergent. Modern concentrated detergents are designed for smaller doses than older formulas, and excess detergent leaves residue that feeds bacteria. Run a hot drum clean cycle with a cleaning tablet to reset things. Going forward, mix in a 60-degree wash at least once a fortnight, and measure your detergent rather than estimating - most dosing lines suggest more than you actually need.

How often should a washing machine be professionally serviced?

Most appliance engineers suggest a service every two to three years as a preventive measure. For most households in Andover, a solid monthly cleaning routine keeps things running well between professional visits. If you're running the machine daily for a large family, annual check-ups can catch wear on bearings and seals before they become costly faults. Machines from brands like Bosch and LG tend to be built to tighter tolerances and may need less frequent professional attention, though every machine benefits from regular filter cleaning regardless of make.

FAQ

Can a smelly washing machine make your clothes smell too?

Yes, it can. Mould and bacteria inside the drum, door seal, or hoses can transfer to fabrics during a wash cycle. You might notice clothes smelling musty straight out of the machine, or only after they've been left to dry. Running a hot drum clean cycle and thoroughly cleaning the inside of the door seal fold usually clears this within a wash or two.

What does the white vinegar cleaning method actually do?

White vinegar is mildly acidic, which makes it effective at breaking down limescale, soap scum, and certain bacteria. Pour around 500ml directly into the drum - not the detergent drawer - and run the hottest available cycle with the drum empty. It's a safe, low-cost option for regular maintenance and won't damage seals or internal components at normal use quantities.

How do I know if the smell is from my plumbing rather than the machine itself?

If the smell is strongest near the back of the machine where the drain hose connects to the wall, and the machine itself is clean, your household plumbing may be the source. A dried-out U-bend or a poorly fitted drain connection can let sewer gases back into the room. An engineer can check the hose connection, but persistent smells from a clean machine are worth asking a plumber to look at too.

Do I need to descale my washing machine in Andover?

Yes, it is worth doing. Andover sits in a moderately hard water zone, which means limescale builds up on the heating element over time, reducing efficiency and contributing to odours. Using a dedicated descaler like Calgon monthly, or running a periodic vinegar cycle, keeps this under control. If your machine has never been descaled, starting that routine now will make a noticeable difference to both the smell and overall running performance.