How to Troubleshoot Odors in a Bosch Washing Machine

BoschBosch Washing MachineModerate⏱ 1 - 2 hours

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Use this guide to clean a Bosch front-loading washing machine with the Drum Clean cycle. The cycle uses very hot water and a washing machine cleaner to clean the drum, detergent dispenser area, and internal pipework. Run it every few months or about every 30 wash cycles to reduce bacteria, mold, and stale odors, especially if you often use cold, 30 °C, or 40 °C washes. This procedure applies to Bosch washers with a Drum Clean option, but some models may use a Service option or a manually selected 90 °C wash instead.

🧰 Tools

Washing machine cleaner

ШагиSteps

Prepare for a hot cleaning cycle

Keep children and pets away from the washer while the Drum Clean cycle runs.
The cycle heats water to 90 °C, and the front door glass can get hot enough to burn skin.
Run this cleaning routine every few months or about every 30 wash cycles.
Use it sooner if the washer smells stale or if you mostly wash with cold, 30 °C, or 40 °C cycles.
Make sure the drum is empty.

Clean common buildup areas

If possible, inspect, remove, and clean the pump filter before running Drum Clean.
Clean the detergent dispenser drawer and the area inside the drawer opening.
You can run Drum Clean without these extra tasks, but they help remove smells from common buildup areas.
If you open the pump filter, unplug the washer first and keep the plug dry.

Add the washing machine cleaner

Use one dose of a washing machine cleaner made for front-loading washers.
Dr. Beckmann Service-it Deep Clean Washing Machine Cleaner powder is one suitable option, and one dose helps kill up to 99.9% of bacteria.
Other washing machine cleaner brands are available.
Follow the cleaner label if it gives different dosing instructions.
Pour the cleaner powder directly into the washing machine drum.
Close the washer door.

Select a hot cleaning program

Select the Drum Clean option on the control panel.
If the washer doesn't have Drum Clean, select the Service option.
If neither option is available, choose any wash program that lets you set 90 °C.
The Bosch washer used for this guide automatically selects 90 °C and shows a run time of one hour and 10 minutes.
Turn on the child lock if the washer has one.

Run the Drum Clean cycle

Start the cycle.
Let the cycle run without opening the door or touching the door glass.
Expect the drum to get very soapy during the cleaning portion.
That soapiness is normal.
The cycle cleans the dispenser drawer area, drum, and internal pipework.
It helps kill bacteria and remove mold.
Near the end, the washer rinses with very hot water and runs a spin.

Finish the cycle

Wait until the program ends and the door lock releases.
Turn off the child lock if you turned it on.
Switch off the washer.
Open the door.
Check that the drum looks clean and smells fresh.

Ventilate the washer

After any wash program, leave the detergent dispenser drawer slightly ajar.
Leave the main drum door slightly ajar.
This airflow helps stop odors and mold from building up.

Check persistent odors

If odors remain after Drum Clean, inspect the pump filter for a blockage.
Check the drainage hose for a blockage if the washer still smells.
Clean the dispenser drawer and drawer opening if you didn't clean them before the cycle.
Clear any blockage before repeating the hot cleaning cycle.
If the washer still smells, get drainage troubleshooting help before assuming the Drum Clean cycle failed.

Run this cleaning routine every few months or about every 30 wash cycles, and keep the door and dispenser drawer ajar after washes so the machine can dry. If odors come back after cleaning the pump filter, dispenser drawer, and drain path, the washer may need additional drainage troubleshooting. Repair didn't go as planned? Ask our Answers community for help.

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