The purpose of alarm off on a Bosch refrigerator
The indication is triggered when the temperature in the refrigerator or freezer compartment rises. The alarm warns the owner of the equipment about a breakdown and indicates the risk of damage to stored products. The translation of the English word alarm into Russian means “alarm.” Simultaneously with the light reminder, the alarm buzzer sounds. The warning also lights up when the temperature drops below the permissible limit.
Depending on the design of the refrigerator, the error is displayed:
- warning message alarm or alarm off on the display, shown in red, orange or dark letters (depending on the model);
- red LED located in the control panel, which flashes in time with the sound.
Problems that you can solve yourself
Reasons for activating the alarm icon on working Bosch refrigeration equipment:
- It is normal for the indicator to be activated when a new refrigerator is turned on for the first time or when equipment is put into operation after washing or repair. After the chambers have cooled down, the alarm turns off automatically.
- When loading a large amount of food, the refrigerator compartment warms up, which causes the signal to activate. After cooling, the alarm turns off; to speed up the freezing process, you can enable the accelerated temperature reduction function (Super mode).
- If the door is not tightly closed, warm air enters the chamber. Remove the foreign object and close the lid tightly.
- The formation of a layer of ice on refrigerators without a No Frost system prevents the normal operation of the compressor and evaporator. An additional sign is the prolonged operation of the engine, which is trying to cool the chambers. The repair consists of defrosting the refrigerator.
Door not closed or seal worn out
A common cause of extraneous sounds is a door that is not tightly closed. Obstructions can be caused by the handles of the pan or a large amount of food in the chamber. A more difficult situation arises when the refrigerator is located on an uneven surface, which contributes to the appearance of a slope, or its legs are not adjusted correctly. In this case, it is necessary to move the unit to a level area of the room. An alternative option is to adjust the legs, but in this case you should always check the position of the unit.
Different devices have different functions. Thus, there are models of refrigerators whose alarm goes off if the door is open for no longer than 30 seconds. This is not always convenient, for example, when loading a large amount of food or when you have to open the refrigerator frequently. For many units, the temperature indicator alarm goes off after 2 minutes of inactivity.
Malfunctions requiring repair
Common breakdowns that cause the alarm indication to turn on on Bosch brand refrigerators:
- destruction of the rubber seal;
- misalignment or wear of the hinges;
- lack of tightness of the cooling circuit, leading to freon leakage;
- contamination of the capillary channels by deposits of oil present in the refrigerant;
- breakdown of the sensor that determines the temperature in the refrigerator and controls the operation of the compressors;
- failure of components of the No Frost automatic deicing system;
- failure of electronics or breakage of electrical wiring harnesses inside the refrigerator;
- jamming of the distribution valve responsible for supplying cold air.
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The freezer seal is worn out or damaged.
There is a rubber edging along the perimeter of the door that prevents warm air from entering the freezer or refrigerator compartment.
If tears are detected, the seal should be replaced. Otherwise, the compressor operates with overload, which leads to damage to the electric motor or piston group.
The hinges are loose
Refrigerator doors are installed on adjustable hinges; if the settings are not adjusted, gaps form between the seal and the body.
To check contact at home, use a sheet of paper, which should be tightly clamped with a rubber edge.
The owner needs to adjust the position of the door by adjusting the reach of the supports and moving the hinges. If the defect cannot be eliminated, the hinges must be replaced.
Common compressor failure
Bosch refrigerators are equipped with a common cooling circuit with a single compressor. There are models with separate units for the freezer and refrigerator compartment. If a common unit breaks down, the temperature rises in both compartments.
If one of the electric motors fails, the problem is observed in the upper or lower chamber. The drive fails due to short circuit or breakage of the windings or destruction of the piston group. The compressor cannot be repaired; a new unit must be installed and the circuit must be recharged with refrigerant.
Freon leak
The compressor circulates the refrigerant through the tubes; in the event of a leak, the temperature in the chambers increases, which causes the indicator to turn on.
To restore integrity, it is necessary to determine the location of the leak, and then solder the cracks or disconnect part of the circuit.
For example, craftsmen often cut off the heating pipe around the perimeter of the freezer. The damaged evaporator radiator is replaced entirely, and repair work is carried out in a service center. On refrigerators with 2 compressors, if freon leaks from one circuit, the second remains operational.
Clogged capillary line
The capillary channels are not designed to allow oil particles to enter, which form dense deposits on the walls and block the cross-section. If a problem occurs, the compressor does not maintain the set temperature. Service is carried out in a service center.
If it is not possible to rinse the capillary channels with a solvent and blow them with compressed air, then the tubes will need to be replaced. Under domestic conditions, it is impossible to remove oil from pipelines.
The temperature sensor has failed
There are sensors in the freezer and refrigerator compartments that monitor the temperature and control the operation of the compressor. If the sensor breaks down, the electric motor runs constantly or does not turn on. It is necessary to diagnose the equipment and install new sensors. The work is carried out in a service center. The reaction to a breakdown is determined by the design of the refrigerator; with 2 compressors, the temperature background in the freezer increases; in products with 1 pumping device, when the sensor fails, the ice melts in both chambers.
The No Frost defrost system is faulty
If the No Frost system in Bosch refrigerators breaks down, an alarm goes off and the temperature in both chambers or only the freezer increases (for models with 1 and 2 compressors, respectively).
The owner can reset the error by disconnecting the equipment from the power supply for a few minutes. But after some time, the malfunction occurs again, and the compressor stops pumping refrigerant into the circuits. Repairing No Frost system components is difficult and expensive; many owners prefer to purchase a new refrigerator.
Failure of the electronic unit or its elements
If the electronic controller malfunctions, neither the chamber is cooled, but the backlight or compressor may work. The cause of the defect is oxidation of the tracks or breakage of the wiring harnesses.
The problem also occurs after a voltage surge in the power circuit.
Repair consists of carrying out diagnostics in a service center, determining a list of failed parts and replacing or restoring elements. The cost reaches half the price of new equipment; some components are not supplied to the spare parts market, but are removed from decommissioned refrigerators.
Cold air damper jammed
The design of refrigerators uses a damper that regulates the flow of cold air depending on operating conditions. When the valve jams, the temperature rises, which is detected by a sensor that triggers an alarm. To fix the problem yourself, turn off the power for 8-12 hours and defrost the equipment. The procedure allows you to remove the layer of frost that impedes the movement of the damper. If there is mechanical damage to the valve, you must call a technician who will identify the defect and repair the unit.
Guarantee
The minimum warranty for services is 3 months, the maximum period is 3 years. The exact numbers are announced after the specialist has the diagnostic data in his hands. The duration is affected by the nature of the malfunction and the type of parts being replaced. The manufacturer is responsible for the quality of spare parts. The engineer will definitely write down the terms of cooperation in the contract.
Documentation
Upon completion of the repair work, our service engineer issues a BSO form and leaves you a copy, which indicates the work performed, spare parts installed, cost and warranty period.
Reasons why the refrigerator beeps when the door is closed
The main reasons for the activation of the indication when the camera doors are closed:
- Overloading the refrigeration compartment with products or turning on the equipment after a long period of inactivity. The sensor detects an increased temperature and indicates to the owner a malfunction. A correctly operating compressor cools the air to the set threshold, and the alarm turns off automatically.
- Insufficient compressor performance or freon leak. This causes the alarm to sound, but the refrigerator may operate normally when the temperature is set to a higher value. It is necessary to carry out diagnostics and eliminate the breakdowns, since with further operation the pump may fail due to overheating.
- The capillary block is filled with oil when transporting or storing the refrigerator on its side. After delivery, the equipment must stand in an upright position for at least a day, and then you can turn on the compressor and set the required temperature. Otherwise, the piston group, operating without lubrication, will quickly wear out. Oil that gets into the capillaries disrupts the normal working process of the refrigerant moving into the evaporation chamber.
- Any electronic failure that affects the operation of the cooling circuit. If the equipment is unable to maintain the set temperature or the sensor inside the chamber transmits an incorrect signal, the control unit automatically triggers an alarm. The problem can also occur if the sash is held open for a long time. The air from the room warms up the chamber; after locking, the sensor detects the increased temperature and activates the alarm.
When the alarm signal turns on, the owner of a Bosch refrigerator should check the operating parameters and make sure that the compressor is working and that there are no cracks along the door contour. If the problem cannot be resolved, it is recommended to contact a service center. Self-repair may result in parts breaking and voiding the warranty. It is possible to turn off the sound.
