NEFF K6604X8 - Fridge

K6604X8 - Fridge NEFF - Free user manual and instructions

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Product type Built-in refrigerator
Brand Neff
Model K6604X8
Climate category SN (10 °C to 32 °C), N (16 °C to 32 °C), ST (16 °C to 38 °C), T (16 °C to 43 °C)
Adjustable temperature +2 °C to +8 °C (factory setting: +4 °C)
Refrigerant R600a (flammable, environmentally friendly)
Electrical supply 220-240 V ~ 50 Hz, 10-16 A
Protection class I (with earth wire)
Super-refrigeration Can be activated, lasts about 6 hours
Defrosting Automatic (rear wall)
Interior lighting E14 bulb, 220-240 V (same wattage as defective bulb)
Interior equipment Glass shelves, vegetable bin, egg tray, bottle rack, Vario shelf, delicatessen and cheese drawer, OK sticker
Cleaning Warm water and mild detergent; do not use steam cleaner or abrasives
Installation Built-in; minimum distance: 3 cm from cookers, 30 cm from oil/coal heaters
Safety instructions Do not damage the refrigerant circuit; do not use electrical appliances inside; do not store explosive products
After-sales service Contact customer service with the E-Nr. and FD numbers (on the rating plate)

Frequently Asked Questions - K6604X8 NEFF

How to adjust the refrigerator temperature?
Press the temperature adjustment button (Fig. 2/2) until the desired temperature (between +2 °C and +8 °C) is displayed. The factory setting is +4 °C.
What to do if the interior lighting does not work?
Turn off and unplug the appliance. Replace the defective bulb with an E14 bulb of 220-240 V (same wattage). Also check the light switch (Fig. 12/A).
How to activate super-refrigeration?
Press the 'super' button (Fig. 2/4). The indicator lights up. Super-refrigeration lasts about 6 hours, then the appliance returns to the previously set temperature.
Why does water accumulate at the bottom of the refrigerator?
The defrost water drain is probably clogged. Clean it with a cotton swab (see Fig. 11).
How to clean the interior of the refrigerator?
Turn off and unplug the appliance. Use a soft cloth with warm water and mild detergent. Do not use steam cleaner, abrasives, or acidic products. Dry the door seal thoroughly.
The refrigerator makes a gurgling noise, is that normal?
Yes, that noise is normal. It comes from the circulation of refrigerant in the pipes. Other normal noises include the hum of the motor and clicks when switching on.
What to do if the displayed temperature flashes?
This indicates that the set temperature has not yet been reached. This can happen if you open the door frequently, store large quantities of food, or if the ventilation openings are blocked. Activate super-refrigeration if necessary.
Can I store alcoholic beverages in the refrigerator?
Yes, but only strongly alcoholic beverages upright and in tightly closed containers to avoid any risk.
How to store the appliance if not used for a long time?
Turn off the appliance, unplug it, clean it thoroughly, and leave the door open to prevent mold.
Where to find the serial number and manufacturing number?
They are located on the rating plate inside the appliance (Fig. 13). Note down the E-Nr. and FD numbers before contacting customer service.

User questions about K6604X8 NEFF

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What is the daily energy consumption of the Neff K6604X8?
Frequently Asked Questions - 23/05/2026
Response Notice-Facile

The technical manual for the Neff K6604X8 does not directly specify the annual energy consumption in kWh. However, the refrigerator is rated in class A++, indicating very high energy efficiency.

The precise annual consumption is listed on the nameplate of your appliance (usually located inside, on the side or back wall of the compartment). To find out your daily consumption, simply divide this annual value by 365 days.

Technical information for the model:

  • Operating voltage: 220-240 V
  • Frequency: 50 Hz
  • Energy class: A++ (very efficient)
  • Cooling system: Ventilated with automatic defrost

As a guideline, an A++ integrated refrigerator typically consumes between 200 and 300 kWh per year, which is about 0.5 to 0.8 kWh per day. Checking the nameplate remains the most reliable way to obtain the exact consumption of your model.

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Download the instructions for your Fridge in PDF format for free! Find your manual K6604X8 - NEFF and take your electronic device back in hand. On this page are published all the documents necessary for the use of your device. K6604X8 by NEFF.

USER MANUAL K6604X8 NEFF

natural_image Woman in red dress arranging fresh vegetables on a wooden crate (no text or symbols visible)

Kühlgerät

Refrigerator

Réfrigérateur

Frigorifero

Koelapparaat

Safety and warning information ..... 17

Information concerning disposal ..... 18

Scope of delivery 19

Ambient temperature

and ventilation 19

Installation location 19

Connecting the appliance 20

Getting to know your appliance ..... 20

Switching the appliance on 21

Setting the temperature 21

Usable capacity 21

Refrigerator compartment 22

Super cooling 22

Interior fittings 22

Sticker "OK" 23

Switching off and disconnecting

the appliance 23

Defrosting 24

Cleaning the appliance 24

Tips for saving energy 25

Operating noises 25

Eliminating minor faults yourself ..... 26

Customer service 27

Safety and warning information

Before you switch ON the appliance

Please read the operating and installation instructions carefully! They contain important information on how to install, use and maintain the appliance.

The manufacturer is not liable if you fail to comply with the instructions and warnings. Retain all documents for subsequent use or for the next owner.

Technical safety

This appliance contains a small quantity of environmentally-friendly but flammable R600a refrigerant. Ensure that the tubing of the refrigerant circuit is not damaged during transportation and installation. Leaking refrigerant may cause eye injuries or ignite.

If damage has occurred

  • Keep naked flames and/or ignition sources away from the appliance,
    ■ thoroughly ventilate the room for several minutes,
    ■ switch off the appliance and pull out the mains plug,
    ■ inform customer service.

The more refrigerant an appliance contains, the larger the room must be in which the appliance is situated. Leaking refrigerant can form a flammable gas-air mixture in rooms which are too small. The room must be at least 1 m ^3 per 8 g of refrigerant. The amount of refrigerant in your appliance is indicated on the rating plate inside the appliance. If the power cord of this appliance is damaged, it must be replaced by the manufacturer, customer service or a similarly qualified person. Improper installations and repairs may put the user at considerable risk.

Repairs may be performed by the manufacturer, customer service or a similarly qualified person only.

Only original parts supplied by the manufacturer may be used. The manufacturer guarantees that only these parts satisfy the safety requirements.

A extension cable may be purchased from customer service only.

Important information when using the appliance

■ Never use electrical appliances inside the appliance (e.g. heater, electric ice maker, etc.). Risk of explosion!
- Never use a steam cleaner to defrost or clean the appliance! The steam may penetrate electrical parts and cause a short-circuit. Risk of electric shock!
- Do not use pointed or sharp-edged implements to remove frost or layers of ice. You could damage the refrigerant tubing. Leaking refrigerant may ignite or cause eye injuries.
- Do not store products which contain flammable propellants (e.g. spray cans) or explosive substances in the appliance. Risk of explosion!
- Do not stand or support yourself on the base, drawers or doors, etc.
■ Before defrosting and cleaning the appliance, pull out the mains plug or switch off the fuse. Do not pull out the mains plug by tugging the cable.

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■ Bottles which contain a high percentage of alcohol must be sealed and stored in an upright position.
- Keep plastic parts and the door seal free of oil and grease. Otherwise, parts and door seal will become porous.
■ Never cover or block the ventilation openings for the appliance.
■ People (children incl.) who have limited physical, sensory or mental abilities or inadequate knowledge must not use this appliance unless they are supervised or given meticulous instructions.

Children in the household

  • Keep children away from packaging and its parts.
    Danger of suffocation from folding cartons and plastic film!
  • Do not allow children to play with the appliance!
    If the appliance features a lock: keep the key out of the reach of children!

General regulations

The appliance is suitable for refrigerating food.

This appliance is intended for use in the home and the home environment.

The appliance is suppressed according to EU Directive 2004/108/EC.

The refrigeration circuit has been checked for leaks.

This product complies with the relevant safety regulations for electrical appliances (EN 60335-2-24).

Information concerning disposal

Disposal of packaging

The packaging protects your appliance from damage during transit. All utilised materials are environmentally safe and recyclable. Please help us by disposing of the packaging in an environmentally friendly manner.

Please ask your dealer or inquire at your local authority about current means of disposal.

Disposal of your old appliance

Old appliances are not worthless rubbish! Valuable raw materials can be reclaimed by recycling old appliances.

NEFF K6604X8 - Disposal of your old appliance - 1

This appliance is identified according to the European guideline 2002/96/EC on waste electrical and electronic equipment – WEEE. The directive specifies the framework for an EU-wide valid return and re-use of old appliances.

Warning

Redundant appliances

  1. Pull out the mains plug.
  2. Cut off the power cord and discard with the mains plug.
  3. Do not take out the trays and receptacles: children are therefore prevented from climbing in!
  4. Do not allow children to play with the appliance once it has spent its useful life. Danger of suffocation!

Refrigerators contain refrigerant and gases in the insulation. Refrigerant and gases must be disposed of professionally. Ensure that tubing of the refrigerant circuit is not damaged prior to proper disposal.

Scope of delivery

After unpacking all parts, check for any damage in transit.

If you have any complaints, please contact the dealer from whom you purchased the appliance or our customer service.

The delivery consists of the following parts:

■ Built-in appliance
■ Interior fittings (depending on model)
■ Bag containing installation materials
- Operating instructions
■ Installation manual
■ Customer service booklet
■ Warranty enclosure
■ Information on the energy consumption and noises

Ambient temperature and ventilation

Ambient temperature

The appliance is designed for a specific climate class. Depending on the climate class, the appliance can be operated at the following temperatures.

The climate class can be found on the rating plate. Fig. 13

Climate class Permitted ambient temperature
SN +10 °C to 32 °C
N +16 °C to 32 °C
ST +16 °C to 38 °C
T +16 °C to 43 °C

Note

The appliance is fully functional within the room temperature limits of the indicated climatic class. If an appliance of climatic class SN is operated at colder room temperatures, the appliance will not be damaged up to a temperature of +5 °C.

Ventilation

The air on the rear panel of the appliance heats up. Conduction of the heated air must not be obstructed. Otherwise, the refrigeration unit must work harder. This increases power consumption.

Therefore: Never cover or block the ventilation openings!

Installation location

Install the appliance in a dry, well ventilated room. The installation location should neither be exposed to direct sunlight nor near a heat source, e.g. a cooker, radiator, etc. If installation next to a heat source is unavoidable, use a suitable insulating plate or observe the following minimum distances to a heat source:

■ 3 cm to electric or gas cookers.
■ 30 cm to an oil or coal-fired cooker.

Connecting the appliance

After installing the appliance, wait at least 1 hour until the appliance is switched on. During transportation the oil in the compressor may have flowed into the refrigeration system.

Before switching on the appliance for the first time, clean the interior of the appliance (see chapter “Cleaning the appliance”).

Electrical connection

The socket must be near the appliance and also freely accessible following installation of the appliance.

The appliance complies with the protection class I. Connect the appliance to 220-240 V/50 Hz alternating current via a correctly installed socket with protective conductor. The socket must be fused with a 10 to 16 A fuse.

For appliances operated in non-European countries, check whether the stated voltage and current type match the values of your mains supply match the values of the mains supply. This information can be found on the rating plate. Fig. 13

NEFF K6604X8 - Electrical connection - 1

Warning

Never connect the appliance to electronic energy saver plugs.

Our appliances can be used with mains and sine-controlled inverters. Mains-controlled inverters are used for photovoltaic systems which are connected directly to the national grid. Sine-controlled inverters must be used for isolated applications (e.g. on ships or in mountain lodges) which are not connected directly to the national grid.

Getting to know your appliance

Illustration showing a hand holding an open document with text blocks and a curved arrow pointing to a grid-like diagram, indicating transformation or mapping.

Please fold out the illustrated last page. These operating instructions refer to several models.

The features of the models may vary. The diagrams may differ.

Fig. 1

* Not all models.

1-4 Controls/light
5 Light switch
6 Main On/Off switch
8 Vegetable container
9 Butter and cheese compartment *
10 Egg rack
11 Shelf for tubes and small tins
12 Shelf for large bottles

7 G I a s s s h

Controls

Fig. 2

1 Main On/Off switch

Serves to switch the whole appliance on and off.

2 Temperature selection button

Press this button to set the temperature.

3 Temperature display refrigerator compartment

The numbers next to the temperature display lights correspond to refrigerator compartment temperatures in °C. The lit lamp indicates the selected temperature.

4 "super" button

Is used to switch on the super cooling (see chapter entitled "Super cooling").

Switching the appliance on

Switch on the appliance with the main On/Off switch. Fig. 2/1

The temperature display, Fig. 2/3, flashes until the appliance has reached the set temperature.

The appliance starts to cool, the light is switched on when the door is open.

When the appliance has been switched on, it may take several hours until the set temperature has been reached. Do not put any food in the appliance beforehand.

Operating tips

The refrigerator compartment temperature rises:

■ if the appliance door is opened frequently,
■ if large quantities of food are placed in the refrigerator compartment,
■ if the ambient temperature is high.

Setting the temperature

Fig. 2

Refrigerator compartment

The temperature can be set from +2 °C to +8 °C.

Keep pressing temperature setting button 2 until the required refrigerator compartment temperature is set.

The value last selected is saved. The set temperature is indicated on temperature display 3.

We recommend a factory setting of +4 °C in the refrigerator compartment.

Perishable food should not be stored above +4 °C.

Usable capacity

Information on the usable capacity can be found inside your appliance on the rating plate. Fig. 13

Refrigerator compartment

The refrigerator compartment is the ideal storage location for ready meals, cakes and pastries, preserved food, condensed milk, hard cheese, fruit and vegetables sensitive to cold as well as tropical fruit.

Note when loading products

Wrap or cover food before placing in the appliance. This will retain the aroma, colour and freshness of the food. In addition, flavours will not be transferred between foods and the plastic parts will not become discoloured.

Note

Avoid contact between food and rear panel. Otherwise the air circulation will be impaired.

Food or packaging could freeze to the rear panel.

Note the chill zones in the refrigerator compartment

The air circulation in the refrigerator compartment creates different chill zones:

- Coldest zone is between the arrow stamped on the side and the glass shelf situated below. Fig. 3

Note

Store perishable food (e.g. fish, sausage, meat) in the coldest zones.

■ Warmest zone is at the very top of the door.

Note

Store e.g. cheese and butter in the warmest zone. When served, the cheese will not have lost its flavour and the butter will be easy to spread.

Super cooling

Super cooling sets the refrigerator temperature to the coldest temperature setting for approx. 6 hours. Then the appliance automatically switches to the temperature set prior to super cooling mode.

Switch on super cooling mode, e.g.

■ before placing large quantities of food in the refrigerator compartment.
■ for the fast cooling of drinks.

Switching on and off

Fig. 2

Press "super" button 4.

The button is lit when super cooling is switched on.

Interior fittings

You can reposition the shelves inside the appliance and the door shelves as required:

■ Pull shelf forwards, lower and swing out to the side. Fig. 4
■ Raise the door shelf and remove. Fig. 5

Special features

(not all models)

Vario shelf

Fig. 6

To facilitate the storage of tall items (e.g. cans or bottles), the front part of the Vario shelf can be taken out and pushed under the rear part.

Drawer for sausage and cheese

Fig. 7

The drawer can be removed for adding and removing food. Lift the drawer and pull out. The drawer holder can be adjusted.

Bottle shelf

Fig. 8 A/B

Bottles can be stored securely on the bottle shelf. The holder can be adjusted.

Temperature and humidity regulator for vegetable container

Fig. 9

For long-term storage of vegetables, salads and fruit, slide the regulator all the way to the right – ventilation opening is open – temperature drops.

For short-term storage slide the regulator to the left. Ventilation opening is closed – high air humidity – temperature rises.

Bottle holder

Fig. 10

The bottle holder prevents bottles from falling over when the door is opened and closed.

Sticker "OK"

(not all models)

The “OK” temperature monitor can be used to determine temperatures below +4 °C. Gradually reduce the temperature if the sticker does not indicate “OK”.

Note

When the appliance is switched on, it may take 12 hours until the temperature is reached.

NEFF K6604X8 - Note - 1

Correct setting

Switching off and disconnecting the appliance

Switching the appliance off

Fig. 2

Press the main On/Off switch 1 (red circle becomes visible).

Temperature display goes out. Fridge and light are switched off.

Disconnecting the appliance

If you do not use the appliance for a prolonged period:

  1. Switch off the appliance.
  2. Pull out mains plug or switch off fuse.
  3. Clean the appliance.
  4. Leave the appliance door open.

Defrosting

Refrigerator compartment defrosts fully automatically

While the refrigerating unit is running, beads of condensation or hoarfrost form at the back of the refrigerator compartment. This is quite normal. It is not necessary to wipe off the condensation or frost. The rear panel defrosts automatically. The condensation runs into the condensation channel, Fig. 11. and is conveyed to the refrigerating unit where it evaporates.

Note

Keep the condensation channel and drainage hole clean, so that the condensation can run out.

Cleaning the appliance

NEFF K6604X8 - Cleaning the appliance - 1

Caution

  • Do not use abrasive, chloride or acidic cleaning agents or solvents.
  • Do not use scouring or abrasive sponges. The metallic surfaces could corrode.
    ■ Never clean shelves and containers in the dishwasher. The parts may become deformed!

Proceed as follows:

  1. Before cleaning: Switch the appliance off.
  2. Pull out the mains plug or switch off the fuse.
  3. Clean the appliance with a soft cloth, lukewarm water and a little pH neutral washing-up liquid. The rinsing water must not run into the light.
  4. Wipe the door seal with clear water only and then wipe dry thoroughly.
  5. Rinsing water must not run through the drainage hole into the evaporation area.
  6. After cleaning reconnect and switch the appliance back on.

Interior fittings

All variable parts of the appliance can be taken out for cleaning.

Take out glass shelves

Fig. 4

Lift the glass shelves, pull forwards, lower and swivel out to the side.

Condensation channel

Fig. 11

Regularly clean the condensation channel and drainage hole with a cotton bud or similar implement to ensure that the condensation can drain.

Take out shelves in the door

Fig. 5

Lift shelves upwards and take out.

Tips for saving energy

- Install the appliance in a dry, well ventilated room! The appliance should not be installed in direct sunlight or near a heat source (e.g. radiator, cooker). If required, use an insulating plate.

  • Allow warm food and drinks to cool down before placing in the appliance.
    ■ Thaw frozen food in the refrigerator compartment and use the low temperature of the frozen food to cool refrigerated food.
  • Open the appliance as briefly as possible.
    ■ Occasionally clean the rear of the appliance to prevent an increased power consumption.

Operating noises

Quite normal noises

Droning

Motors are running (e.g. refrigerating units, fan).

Bubbling, humming or gurgling noises

Refrigerant is flowing through the tubing.

Clicking

Motor, switches or solenoid valves are switching on/off.

Preventing noises

The appliance is not level

Please align the appliance with a spirit level. Use the height-adjustable feet or place packing underneath them.

The appliance is not free-standing

Please move the appliance away from adjacent units or appliances.

Containers or storage areas wobble or stick

Please check the removable parts and re-insert them correctly if required.

Bottles or receptacles are touching each other

Move the bottles or receptacles slightly away from each other.

Eliminating minor faults yourself

Before you call customer service:

Please check whether you can eliminate the fault yourself based on the following information.

Customer service will charge you for advice – even if the appliance is still under guarantee!

Fault Possible cause Remedial action
Temperature differs greatly from the set value.In some cases it is adequate to switch off the appliance for 5 minutes.If the temperature is too high wait a few hours and check whether the temperature has approached the set value.If the temperature is too low check the temperature again the next day.
The light does not work.The bulb is defective.Replace bulb. Fig.12/B1. Switch the appliance off.2. Pull out mains plug or switch off fuse.3. Remove bulb cover from the rear.4. Change the bulb.(Replacement bulb: 220-240 V a.c., E14 bulb holder, see defective bulb for wattage.)
Light switch is jammed.Check whether it can be moved. Fig.12/A
Bottom of the refrigerator compartment is wet.The condensation channel or drainage hole are blocked.Clean the condensation channel and the drainage hole. See chapter Cleaning the appliance. Fig.11
The temperature in the refrigerator compartment is too cold.Temperature has been set too low.Increase the temperature.
The refrigerating unit is switching on more frequently and for longer.Appliance opened frequently.Do not open the appliance unnecessarily.
The ventilation openings have been covered.Remove obstacles.
Temperature display refrigerator compartment is flashing. Fig. 2/3Appliance opened frequently.Do not open the appliance unnecessarily.
Too much food was placed in the compartment.Before placing food in the freezer, press the “super” button.
The ventilation openings have been covered.Remove obstacles.
Appliance has no refrigeration capacity.■ Appliance has been switched off. ■ Power failure. ■ The fuse has been switched off. ■ The mains plug has not been inserted properly.Press main On/Off switch. Fig. 2/1 Check whether the power is on. Check the fuse.

Customer service

Your local customer service can be found in the telephone directory or in the customer-service index. Please provide customer service with the appliance product number (E-Nr.) and production number (FD).

These specifications can be found on the rating plate. Fig. 13

To prevent unnecessary call-outs, please assist customer service by quoting the product and production numbers. This will save you additional costs.

Repair order and advice on faults

Contact information for all countries can be found on the enclosed customer service list.

GB 0844 8928989 Calls from a BT landline will be charged at up to 3 pence per minute. A call set-up fee of up to 6 pence may apply.

IE 01450 2655

natural_image Line drawing of a refrigerator interior with open storage compartments and a window (no text or symbols)

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NEFF K6604X8 - Repair order and advice on faults - 2

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NEFF K6604X8 - Repair order and advice on faults - 3

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NEFF K6604X8 - Repair order and advice on faults - 4

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NEFF K6604X8 - Repair order and advice on faults - 5

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NEFF K6604X8 - Repair order and advice on faults - 6

natural_image Illustration of a bottle partially submerged in water, with no visible text or symbols

8/B 9

NEFF K6604X8 - Repair order and advice on faults - 7

natural_image Diagram of a refrigerator interior showing open and closed compartments with directional arrows indicating movement (no text or symbols)

NEFF K6604X8 - Repair order and advice on faults - 8

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NEFF K6604X8 - Repair order and advice on faults - 9

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10
11

NEFF K6604X8 - Repair order and advice on faults - 10

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B °C 2 4 5 6 8 super

12

E - Nr FD - Nr

13

NEFF K6604X8 - Repair order and advice on faults - 13

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Product information

Brand : NEFF

Model : K6604X8

Category : Fridge