
The BOSCH WAN28266CS Serie 4 is a front-loading washing machine with an 8kg capacity and a spin speed of up to 1400rpm, combining economical operation with features for more convenient laundry care. The steam programme helps reduce creasing, the A energy rating saves on consumption, and Active Water Plus technology adjusts the amount of water to the current load. For faster washing, the Speed Perfect function is available, and the practical Reload feature lets you add forgotten items even after the cycle has started. The Eco Silence Drive motor ensures quiet operation and a long service life.
Energy class A:
save energy with the most efficient A energy class
Steam treatment:
a smart steam treatment that smoothes laundry by up to 50%
Active Water Plus:
highly efficient water management for smaller loads – saving up to 50% water
Reload function:
forgot to add a dirty t-shirt to the wash? Now you can simply add it during the cycle
Speed Perfect:
perfectly clean laundry while reducing washing time by up to 65%
Cottons
For washing durable textiles made of cotton, linen or blended fabrics. Also suitable as a short programme for normally soiled laundry with the Speed Perfect function activated.
Eco 40-60
A programme that achieves energy efficiency. The washing machine chooses the most suitable water temperature itself. Suitable for cotton, linen and blended textiles.
Easy-care
For washing textiles made from synthetics and blended fabrics.
Quick/Mix
A mixed load with cotton and synthetic fabrics.
Delicates/Silk
For washing delicate textiles made of silk, viscose or synthetics.
Wool/Hand wash
For washing textiles made of wool or with a wool content that are suitable for hand and machine washing.
Shirts/Blouses
This programme is designed for washing non-iron shirts and blouses made of cotton, linen and synthetic materials.
Hygiene Plus
For washing durable textiles made of cotton, linen and blended fabrics. Suitable for allergy sufferers and for enhanced hygiene requirements.
Sportswear
For washing sportswear and leisurewear made from synthetics, microfibres and fleece.
Steam Treat
A programme to remove odours and reduce creasing. Suitable for textiles that don't need frequent washing.
Dark Wash
For washing dark and intensely coloured textiles made from cotton and easy-care fabrics, such as jeans.
Drum Clean
Suitable before first use, when washing frequently at 30°C or lower, and when the washing machine has not been used for a long time.
Quick 15'/30'
For washing textiles made from cotton, synthetics and mixed fabrics. A short programme for small, lightly soiled items.
Spin/Drain & Rinse
Select the rinse, spin and drain options as needed.
The BOSCH WAN28266CS Serie 4 washing machine uses a Steam Treat function, which gives your laundry an extra steam treatment to smooth it out, or even replace ironing. You can have your clothes steam-treated for a great look and reduced creasing.
Thanks to their energy management system, Bosch washing machines achieve the highest energy class A and ensure efficient laundry washing.
Our ActiveWater Plus technology delivers perfect results while using only the necessary amount of water for each wash. Thanks to its highly efficient water management technology, the exact load is automatically detected and the water consumption is adjusted accordingly. Save up to 50% of water when washing smaller loads.
The BOSCH WAN28266CS Serie 4 washing machine features SpeedPerfect, a special function designed for situations where time is of the essence. It lets you significantly reduce the washing time without compromising on quality. The function can be used in combination with most programmes, all load sizes and types of textiles. For example, by selecting the Mix programme in combination with the SpeedPerfect function, you can wash up to 4 kilograms of mixed load in just 46 minutes.
When was the last time you loaded the washing machine, started the cycle, and then realised you'd forgotten a baby's sock or a t-shirt? The Reload function on the BOSCH WAN28266CS Serie 4 washing machine lets you easily add forgotten clothes or remove laundry even during a wash cycle.* Simply pause the running programme and open the door to add the forgotten items to the drum, and then continue washing. (*Adding items is not possible if the suds temperature is higher than 50°C or the water level in the drum is too high.)
The efficient and quiet brushless motor's design reduces noise, vibration and heat during operation. By limiting friction, it also contributes to the appliance's long-term high performance. The quality of the motor is confirmed by a 10-year warranty.
You'll also appreciate the hygienic washing programme, which effectively kills 99.99% of germs even at 40°C.
The unique, patented VarioDrum system washes all types of clothing gently and efficiently, distributing water evenly without stretching, creasing or damaging your favourite garments. The teardrop-shaped perforations of the drum and the asymmetrical paddles of the BOSCH WAN28266CS Serie 4 washing machine gently turn your laundry towards the centre, regardless of the direction of rotation. This not only ensures an intensive wash for heavily soiled laundry, but also a faster and more thorough wash cycle.
The LED display with touch control provides a clear overview of the programme, temperature and other settings. The controls are designed to be quick and easy to understand, without complex menu navigation. This makes it easy to monitor the washing progress and adjust the settings as needed.
Stop your dark clothes from fading after just a few washes! A special programme for dark clothing preserves its colour and vibrancy, keeping it looking like new for longer. You'll never have to worry about your favourite black t-shirt turning grey again!
After a certain period of operation, the washing machine will automatically remind you that the drum needs to be cleaned. If approximately 20 cycles are run at temperatures below 40°C, a recommendation to run the drum clean programme will be displayed. This promotes the hygienic condition of the appliance and ensures stable performance over the long term.
The innovative design of the side walls is not only visually appealing, but it also provides high stability, reduces vibrations and significantly minimises noise levels. This makes Bosch washing machines very quiet, even during the spin cycle.
Choose a time within a 24-hour window for the wash to be completed.
You no longer need to worry about washing your sportswear. Just choose the specially adapted Sport/Fitness programme with low washing temperatures, from 'cold' to 40°C. A short spin cycle and brief rinse reduces creasing.
With the Touch Control panel, you'll no longer have to spend ages figuring out how to set your wash cycle. This intuitive design lets you easily adjust your washing machine's settings without needing to go through the user manual. Enjoy the simple controls that make your daily laundry routine easier!

Energy class
A
Spin efficiency
B
Maximum wash capacity
1–8kg
Spin speed
0–1400rpm
Noise level
72dB
Special functions and settings
drum clean with reminder function, Steam treatment, shirts/blouses, Hygiene Plus, jeans/dark laundry, spin/drain, quick/mix, sport/fitness, rinse, super quick 15'/30', delicates/silk, wool/hand wash
The Bosch brand is committed to not disappointing its customers' trust. The price of the product includes a guaranteed 15-year availability of spare parts*, an extensive network of professional service technicians, and both warranty and post-warranty service that 90% of customers would recommend.**
*If the repair is functionally relevant and the parts are storable. Applies to appliances manufactured after 1 January 2023.
**Based on an NPS survey in 2025, where 90% of a total of 3450 respondents in the Czech Republic and Slovakia stated they were satisfied with BSH customer services.
Is it possible to change the door opening direction on the washing machine?
On the vast majority of front-loading washing machines, the door opening direction cannot be reversed, since the door hinge is permanently built into the front panel and tied to the electromagnetic safety lock. Reversible doors are more common on dryers or certain premium models.
Is it possible to remove the top panel?
On modern washing machines, the top panel cannot be removed for undercounter installation, as it provides protection against moisture and electrical hazards. These machines are designed to stand freely or fit under a sufficiently high countertop (85 cm).
The control of the washing machine is locked and the key symbol (child lock) is illuminated.
The child lock is active. To turn it off, press and hold the "Ready in" and "Spin speed" buttons — or the button marked with a key/3s icon — together for about 3 seconds. The machine will beep and the key symbol will go out.
Is it better to have a washing machine with or without i-DOS?
A washing machine with i-DOS (automatic dosing) is the better choice. It detects the load size, fabric type, and soil level, then doses detergent down to the milliliter. This can save up to 38% of water use and a significant amount of detergent each year, while helping prevent stains and residue buildup in the drum.
Can I use powdered detergent with a washing machine with i-DOS?
Yes, powdered detergent can be used, but it can't be dosed automatically. It needs to go manually into the compartment designated for manual dosing in the drawer, while the automatic i-DOS chambers are meant only for liquid detergent and softener.
i-DOS automatic dosing does not dispense detergent (in general).
Check whether the i-DOS function is switched on for that chamber on the control panel (look for the lit icon). Also check that the detergent isn't too thick — it can be diluted slightly with water — and that the drawer's suction valves aren't clogged; it's best to remove the drawer and rinse it thoroughly with warm water.
The washing machine does not dispense fabric softener.
For manual dosing, check whether the cap or siphon in the softener compartment is blocked — remove the drawer and rinse it with warm water. With i-DOS, make sure the chamber is set in the machine's menu to dispense softener (not a second detergent) and that dosing is switched on.
I am having trouble unscrewing the bottom filter for objects.
The filter is often blocked by limescale, lint, or a foreign object such as a coin. Avoid using excessive force, as this can strip the plastic thread. Try gently working it loose by turning it back and forth, or carefully use pliers with a cloth for grip. If the problem persists, it's best to contact authorized service.
How do I drain the water from the washing machine and open the locked door (if the program did not complete and ended with an error)?
Unplug the machine from the power supply. Open the small service panel at the bottom and drain the water into a container using the small emergency drain hose. Then pull the emergency release cord (usually a black or blue plastic tab) downward to mechanically unlock the door so it can be opened.
What are the dimensions of the washing machine?
Standard front-loading washing machines measure roughly 85 cm in height, 60 cm in width, and 55–60 cm in depth.
The washing machine jumps during the spin cycle.
This is most often caused by not removing the transit bolts on the back of the machine after unboxing. If they were removed, check that the machine is properly leveled on its adjustable feet and stands firmly on a stable floor. An overloaded drum or a single bulky item (like a blanket) causing an uneven load can also be the cause.
The laundry doesn't smell fresh after washing.
This usually happens due to bacteria and mold buildup inside the machine from frequent washing at low temperatures (30–40 °C). Run the Drum Clean program or an intensive 90 °C cycle with a washing machine cleaner and no laundry. After each wash, leave the door and detergent drawer slightly open.
What is the duration of each program?
Duration depends on the selected program and load size. Eco 40-60 usually takes the longest, around 3 to 3.5 hours, to maximize energy and water savings. Quick programs (Super 15'/30') take 15 to 30 minutes, while a standard Cotton 40 °C program runs about 2 to 2.5 hours.
Can I place a dryer on top of the washing machine?
Yes, this is possible and a popular space-saving setup. A dryer can be placed on top of a front-loading washing machine that's at least 55 cm deep. For safe installation, it's essential to use an original stacking kit, which may also include a handy pull-out shelf.
Why does the program time lengthen or shorten?
Washing machines are equipped with smart sensors (such as ActiveWater Plus) that monitor load size, fabric absorbency, and foam levels. If a smaller load is detected, the time is shortened dynamically. If there's excess foam or an unbalanced load, the machine adds extra rinses or tries to redistribute the laundry, which extends the time instead.
Can the water and drain connections of the washing machine be extended?
Yes. The AquaStop inlet hose can't be extended with a regular hose — an original extension kit (code WMZ2381 / WMZ20490), 2.5 meters long, must be used instead. The drain hose can be extended using a standard connector and extension hose, up to a maximum total length of 4 meters.
For questions about Bosch large home appliances, you can find all the useful information here.
BSH domácí spotřebiče s.r.o., Radlická 350/107c, 158 00, Praha 8, www.bsh-group.com/cz
Specifications can be changed without notice. Images are for illustrative purposes only.