Owners of refrigerators Bosch with separate cooling zones are often faced with the need to defrost only the freezer compartment without affecting the main compartment. This is relevant when there is ice on the walls, a decrease in freezing efficiency, or before general cleaning. However, not everyone knows that modern models Bosch (for example, series KGE36, KGN39, KGN33**) support isolated defrosting a procedure that saves time and keeps food in the refrigerator compartment fresh.
In this article we will analyze three official methods defrosting the freezer Bosch without turning off the entire unit: through the control panel, manually for systems NoFrost and in the classic way for drip models. You will also learn how to speed up the process, avoid mistakes and properly prepare the camera for restart. We will pay special attention to the nuances for models with VitaFresh and MultiAirflow —their circulation systems require a specific approach.
Why does a Bosch freezer need to be defrosted separately?
Freezers Cameras Bosch even with technology NoFrost accumulate ice over time - this is due to moisture entering when opening the door or a malfunction of the seal. A thick layer of ice (from 5 mm) impairs heat transfer, causing the compressor to wear out. By defrosting only the freezer, you:
- 🔹 Save energy — the refrigerator compartment continues to cool the food without requiring the temperature to be set again.
- 🔹 Prevent food spoilage — a stable microclimate is maintained in the main chamber (usually +4...+7°C).
- 🔹 Simplify care —there is no need to unload all the products and wash both compartments.
- 🔹 Extend service life —regular defrosting (every 6-12 months) reduces the load on the compressor.
Important: models with NoFrost (for example, Bosch KAN92VI30R) require defrosting less often - once every 1-2 years, while drip systems (series KGN33**) need the procedure every 6 months. Neglect of this rule leads to formation of a “snow coat” on the evaporator, which can cause fan malfunction and breakdown.
⚠️ Attention: If ice forms in the freezer faster than 3 months, check Bosch ice forms faster than 3 months, check door seal for tightness and room temperature (optimally +16...+25°C). At a value below +10°C, the system NoFrost may not work correctly.
Preparation for defrosting: what needs to be done in advance
Improper preparation can lead to flooding of the kitchen or damage to equipment. Follow the checklist:
Place all food in a thermal bag or a second refrigerator
Turn off the water supply (if the model has an ice maker)
Put a tray to collect melt water
Prepare rags and towels
Check the temperature in the refrigerator compartment (should be +4...+7°C)
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To speed up the process, use:
- 🧊 Plastic spatulas (not metal!) to carefully remove ice.
- 💨 Fan - direct the air flow into the freezer (but do not use a hairdryer - it's dangerous!).
- 🧂 Saline solution (1 tbsp salt per 1 liter of water) - accelerates the melting of ice when wiping the walls.
If there are foods in the freezer that cannot be moved (for example, a large carcass), wrap them in newspaper or a towel - this will slow down thawing. The temperature in the refrigerator compartment is maintained automatically while defrosting the freezer, but do not open its door unless necessary.
Once every 3 months
Once every 6 months
Once a year
Only when ice forms
Never defrosted-->
Method 1: Defrosting through the control panel (for models with NoFrost)
Most modern refrigerators Bosch (series KAN, KIN, KGN** from 2018) support the function isolated shutdown of the freezer. This option allows you to defrost only the bottom compartment without affecting the refrigerator compartment. Instructions:
- Press the button
SuperFreezing(if active) and hold for 3 seconds to turn off. - Press the buttons simultaneously
Fridge(refrigerator) andFreezer(freezer) for 5 seconds until the indicatorOffon the freezer display lights up. - Leave the freezer door open and close the refrigerator compartment.
- After 1–2 hours the ice will begin to melt. To speed up the process, use rubber bulbto remove water from the drainage hole (located at the bottom of the back wall).
After the ice has completely melted:
- Wipe the walls with a solution of vinegar (1:1 with water) to disinfection.
- Turn the freezer back on: press
Freezeruntil the indicator appearsOn. - Activate
SuperFreezingfor 6 hours to restore the temperature.
| Bosch model | Does it support isolated defrosting? | Defrosting time (at +20°C indoors) |
|---|---|---|
| KAN92VI30R | Yes (via the panel) | 1.5–2 hours |
| KGN39VL30R | Yes (buttons Fridge/Freezer) |
2–3 hours |
| KGE36AL30R | No (complete shutdown only) | 3–4 hours |
| KIN86AF30R | Yes (touch display) | 1–1.5 hours |
⚠️ Attention: If after turning on the freezer Bosch the indicator blinks Alarm, check whether the drainage hole is blocked. Use a wire or a special brush for cleaning.
Method 2: Manual defrosting for drip systems
Old ones models Bosch (until 2017) and refrigerators with a drip system (series KGE36, KGV36) do not support isolated shutdown of the freezer. In this case, you will have to defrost it manually, but with minimal impact on the refrigerator compartment. Algorithm:
- Set the freezer temperature regulator to. position
0(orOff, if available). - Open the freezer door and secure it (for example, with a wooden stick).
- Place a container of hot water (not boiling water!) in the chamber - this will speed up the melting. Change the water. every 20 minutes.
- Every 30 minutes, remove melt water with a sponge so that it does not get on the electronics.
For models with VitaFresh (fresh zone), it is important to ensure that water does not get into the compartment - this can damage the humidity control system. defrosting:
- Dry the chamber for 1 hour with the door open.
- Set the temperature to
-18°Cand turn onSuperFreezingfor 12 hours.
Method 3: Emergency defrosting in case of breakdown (without turning off the refrigerator)
If the freezer Bosch stops freezing due to icing of the fan (typical for NoFrost), and the refrigerator compartment is working normally, you can defrost only the problematic compartment without completely shutting it down. This method is suitable for models with two compressors (for example, Bosch KAN90VI20R).
Instructions:
- Find on the back wall of the refrigerator safety valve (metal tube with red cap).
- Carefully pull the valve down - this will shut off the refrigerant supply to the freezer, but leave the refrigerator compartment working.
- Leave the freezer door open for 2-3 hours. The ice should melt naturally. way.
- Return the valve to its original position and turn on
SuperFreezing.
If there is no valve (single-compressor models), use alternative method:
- Unplug the refrigerator for 1 minute, then turn it back on.
- Immediately press
Freezerand hold for 10 seconds - the freezer will turn off, but the refrigerator will remain working.
⚠️ Attention: Emergency defrosting through the valve or power reset may reset the settings. After the procedure, check the temperature in both compartments after 6 hours - it should stabilize at +4°C. (refrigerator) and -18°C (freezer).
Common mistakes and how to avoid them
Even experienced users make mistakes when defrosting, which lead to breakdowns. The most common:
- 🚫 Use of sharp objects for chipping ice - this breaks the evaporator, and freon comes out. system. Repair will cost 8–15 thousand rubles.
- 🚫 Closing the door during defrosting - moisture condenses on the seal, which leads to its deformation.
- 🚫 Ignoring the drainage hole - clogged drain causes accumulation of water and corrosion of the bottom.
- 🚫 Turning on the freezer immediately after washing —remaining moisture freezes, forming new ice.
Pay special attention sealing rubber: after defrosting, wipe it with a soda solution (1 teaspoon per glass of water) and lubricate it with silicone grease. This will prevent cracking and loss of elasticity.
What to do if after defrosting the freezer does not turn on?
If the freezer Bosch does not start after defrosting, check:
1. Power —the machine on the control panel may have triggered.
2. Door —in some models the locking is triggered when open door.
3. Display —if an error flashes (for example, E22), this indicates a sensor malfunction. Diagnostics by a technician is required.
4. Compressor —press. ear to the back wall: if you hear a humming sound, but the cold does not come out, there may be a freon leak.
How to care for a Bosch freezer after defrosting
So that the next defrosting is required no earlier than in 6-12 months, follow rules:
- 🧼 Wash the chamber a solution of vinegar or citric acid (2 tablespoons per 1 liter of water) every 3 months.
- 📦 Store food in containers - this reduces humidity and frost formation.
- 🔄 Check the seal once a month: place a sheet of paper between the door and the body. If it falls out, the rubber needs to be replaced.
- ❄️ Do not overload freezer - leave a gap of 2-3 cm between the products for air circulation.
For models with NoFrost (Bosch KAN92, KIN86), be sure to clean it once a year ventilation grilles with a vacuum cleaner - clogged channels lead to icing of the evaporator. If the freezer begins to make noise louder than usual, this is a sign of ice on the fan blades.
FAQ: Answers to frequently asked questions
Is it possible to defrost a Bosch freezer without turning off the refrigerator if I have a model with one compressor?
Yes, but only if your model supports isolated shutdown of the freezer through the panel (see instructions for NoFrost above). For single-compressor refrigerators without such a function, you will have to defrost manually, minimizing the opening of the refrigerator door. An alternative is to use thermal insulation screen (for example, a blanket) to keep the cold in the main chamber.
How long does it take to defrost a Bosch freezer at room temperature temperature?
Time depends on the thickness of the ice and the model:
- Thin layer (up to 5 mm): 1–1.5 hours.
- Middle layer (5–10 mm): 2–3 hours.
- Thick “coat” (from 1 cm): 4–6 hours (it is recommended to speed up the process with a fan).
For models with NoFrost defrosting time is usually 30–50% less.
Why, after defrosting, the Bosch freezer does not freeze, but the refrigerator works?
Probable reasons:
- The fan is blocked - check if there is ice left on the blades (typical for NoFrost).
- Temperature sensor failure - a reboot is required (turn off the refrigerator for 5 minutes).
- Freon leak - if the compressor is humming, but the cold is not coming out, you need a master.
- Malfunction of the switching valve (for two-compressor models).
If the problem persists, contact service - independent repairs can aggravate the breakdown.
Can I use a hair dryer to speed up the defrosting of a Bosch freezer?
❌ No! A hair dryer creates a risk:
- Melting of plastic parts (the maximum temperature for ABS plastic is +80°C, and a hair dryer blows hotter).
- Moisture on electronics (can cause a short circuit).
- Overheating of the seal (it will lose elasticity).
Safe alternatives: fan, container with warm water or special defrosters (for example, IceMelt).
How often do you need to defrost a Bosch freezer with the NoFrost system?
Manufacturer recommends defrosting NoFrost every 1-2 years, but in practice the frequency depends on the conditions:
- Ideal conditions (tight seal, room temperature +16...+25°C) - once every 2 years.
- High humidity (kitchen with a stove, frequent opening of the door) - once a year.
- Frequent power outages - once every 6 months.
Signs that defrosting is needed urgently: the appearance of frost on food, increased time freezing, fan noise.