The situation when the owner discovers that the refrigerator body heats upoften causes panic and fear for the safety of the products. This is a completely understandable reaction, because a household unit should cool, not heat. However, intense heat does not always indicate a breakdown or critical malfunction of the system. In most cases, especially with modern models, this is the normal operating mode provided by engineers during the design.
Brand equipment Dexp, like many modern refrigerators, is equipped with systems that can significantly increase the temperature of external surfaces. Understanding the physics of the processes occurring inside the circuit will help you distinguish the norm from a real breakdown. If this is your first time encountering the problem the side walls of the Dexp refrigerator have heated up to 40-50 degrees, do not rush to call a specialist, but carefully study further recommendations.
In this article we will analyze in detail the heat transfer mechanisms, consider typical operating errors and point out symptoms that require immediate intervention specialists. Proper diagnostics will save time and money, and will also extend the life of your equipment. It is important to learn to distinguish between operating heating and overheating caused by a malfunction compressor or blockage of the system.
The principle of operation of the heat removal system
To understand why the sidewalls heat up, you need to turn to the basic principles of thermodynamics, on which the operation of any refrigeration unit is built. The refrigerator does not produce cold, it only transfers thermal energy from the internal chamber to the external environment. This process is carried out using a refrigerant that circulates in a closed circuit, changing its state of aggregation.
In older models of refrigerators, the evaporator was often located inside the freezer, and the condenser (radiator) hung on the back wall in the form of a black grill. Modern models, including many lines Dexp, use hidden capacitor technology. The circuit tubes are mounted directly into the side walls of the housing or into the space between the inner and outer sheet of metal. This is why the surface becomes hot when the compressor operates.
The heating intensity directly depends on the load on the system. If you have just loaded a large amount of warm food into the chamber or frequently open the door, the compressor begins to work in increased mode. At this time refrigerant actively releases heat through the walls of the case. This is a normal situation, and you should only worry if the heating is accompanied by other alarming symptoms.
⚠️ Attention: If the body of the refrigerator is so hot that it is impossible to touch it with your hand for more than 2-3 seconds, or you smell the smell of burnt wiring, immediately disconnect the device from the network and contact a professional service.
It is also worth noting that the efficiency of heat transfer depends on the ambient temperature. In the summer, when the room is hot, the temperature difference between the condenser and the environment is smaller, so the system has to work harder to release heat. During such periods heating of the walls may be more pronounced than in winter.
Natural causes of heating of the body
There are a number of situations when heating the refrigerator Dexp is an absolutely normal reaction to external or internal factors. In these cases, the equipment works properly, it simply performs its function of cooling the products. Knowing these reasons will help you avoid false alarms.
One of the most common reasons is the “Super Freeze” mode or simply active work after a long period of inactivity. If you turned on a freshly defrosted refrigerator or brought it from the store, it will work at its maximum capacity until it reaches the set temperature. During this period condenser, built into the walls, can be very hot.
- 🔥 Loading a large volume of products at room temperature, which requires intensive cooling.
- 🚪 Frequent opening of doors, leading to the entry of warm, humid air inside the chambers.
- ☀️ High ambient temperature in the room (above +25°C), complicating heat exchange.
- 🧊 Operation in fast freezing mode, when the compressor operates without stopping.
Another important aspect is the location of the unit. If the refrigerator is located close to the wall or in a niche where air circulation is impaired, the heat simply has nowhere to go. It accumulates around the body, creating the feeling that the refrigerator itself is heating up more than usual. In fact, this is simply local overheating due to poor ventilation.
Many users notice that areas around the doorway or vertical racks heat up the most. This is also normal, since tubes often pass there anti-condensation protection. They prevent the formation of mold and moisture on the seals by slightly heating them.
Technical faults and their symptoms
If you have ruled out natural causes, and the refrigerator continues to heat up unnaturally, it may be a technical fault. Unlike standard heating, which is evenly distributed or localized in certain areas, breakdowns often result in asymmetry or extreme temperatures.
One common problem is a clogged capillary tube or filter drier. In this case compressor continues to pump freon, but the circulation in the system is disrupted. The pressure at the outlet of the compressor increases, which leads to its overheating and strong heating of the condenser in the initial part. In this case, the refrigerator itself may not freeze well.
Another reason is a malfunction of the compressor itself. If the motor windings are damaged or seals are compromised, the unit may be overloaded. This can be determined by the characteristic hum, vibration and the fact that the motor does not turn off for a long time. In such cases, professional diagnostics using a pressure manifold are required.
It is also worth checking the ventilation system if we are talking about models with No Frost. If the condenser fan (often located at the bottom of the compressor) is faulty or clogged with dust, heat will not be removed effectively. This will lead to the fact that all equipment will work inefficiently and overheat.
Problems with installation and ventilation
Often the reason that the Dexp refrigerator heats up lies not in the device itself, but in the conditions of its operation. Correct installation is the key to long life of the equipment. Many users neglect the instructions by installing the unit close to furniture, which is strictly prohibited by manufacturers.
For normal operation, the refrigerator requires a constant flow of cold air and an outflow of hot air. If the gap between the back wall and the furniture is less than 5-7 cm, or if the side walls are covered with cabinets, a “heat bag” effect occurs. Hot air circulates around the body, heating it even more and reducing operating efficiency.
- 📏 The minimum distance to the back wall should be at least 7-10 cm.
- 🏠 You cannot build a regular refrigerator into a niche without special ventilation.
- 🚫 It is not recommended to cover the top of the refrigerator or place it in direct sunlight.
- 🌡️ Avoid installing it near heat sources: radiators, stoves, ovens.
Particular attention should be paid to the base part. In some models Dexp air intake for compressor cooling is carried out from below. If dust, animal hair or a bucket of water has accumulated there, circulation is disrupted. Regular cleaning of the space under the refrigerator is a simple but effective preventative measure.
If your refrigerator is built into a kitchen unit, make sure that the furniture has ventilation holes. It often happens that decorative panels block air access, and the equipment wears out. In such cases, the case can heat up to critical values.
Diagnostics: normal or broken?
To determine for sure whether heating is a problem, you need to run some simple diagnostics. You don't need to be an engineer to assess the condition of the device. It is enough to pay attention to several key indicators of system operation.
First of all, evaluate the uniformity of heating. During normal operation, as a rule, one of the side walls (usually the right one, when viewed from the front) and the area between the chambers heat up. If only the top part is hot and the bottom is cold, or vice versa, this may indicate problems with circulation freon.
The second important criterion is the ability to maintain the temperature. If food inside the refrigerator freezes or, conversely, spoils, and the body is very hot, this is a clear sign of a malfunction. Normal heating should not affect the quality of cooling inside the chambers.
| Parameter | Normal condition | Signs of malfunction |
|---|---|---|
| Wall temperature | 30-45°C (warm/hot) | Above 60°C (burns) |
| Operating mode | Cyclic (on/off) | Works without stopping |
| Cooling inside | Stable as specified | Temperature floats |
| Engine sound | Uniform hum | Knock, clanging, humming |
Also listen to the sounds. The refrigerator emits a smooth, quiet hum. If you hear a gurgling sound that doesn't stop or a metallic clanging sound, it's a cause for concern. The combination of strong heating and extraneous noise almost always indicates a breakdown.
☑️ Diagnostics of overheating
Methods for eliminating overheating
If you determine that heating is caused by external factors, you can eliminate them yourself. First of all, ensure free air circulation. Move the refrigerator away from the wall, remove unnecessary items from under and around it. Sometimes it is enough to simply vacuum the radiator grille at the bottom of the unit.
Check the door seals. If they do not fit tightly, warm air constantly enters the chamber, forcing the compressor to work continuously. Wipe the seals with warm water and soap to remove grease and dirt. If the rubber has lost its elasticity, it is better to replace it.
In the hot season, you can use additional measures to cool the room where the equipment is located. Air conditioning or just an open window (if there is no direct sunlight) will help reduce the load on the system. Also, do not put hot food in the refrigerator - let it cool to room temperature.
⚠️ Warning: Never try to cool a hot refrigerator with a fan pointed directly at the back wall if there are electrical contacts there. Moisture from the air can cause a short circuit.
If you suspect a technical malfunction (clogging, leakage, compressor failure), independent repairs without special equipment and skills are impossible and dangerous. Attempts to independently open the circuit or replace compressor can lead to the final failure of the equipment.
Prevention and proper care
So that your Dexp serves for a long time and does not cause problems with overheating, follow simple operating rules. Defrost your refrigerator regularly if it does not have a No Frost system. A thick layer of ice on the evaporator acts as a heat insulator, interfering with cooling and causing the motor to work longer.
Keep the back of the unit clean. Dust, wool and cobwebs are the main enemies of heat transfer. Carefully move the equipment away and vacuum the area around the engine and radiator. This must be done carefully so as not to damage the tubes and wiring.
Do not overload the refrigerator compartment. If you push food in such a way that the vents inside are blocked, the cold will not circulate. This will lead to local overheating in some zones and insufficient cooling in others, which will force the automation to increase operating power.
Frequently asked questions (FAQ)
Is it normal that only one side wall heats up?
Yes, this is absolutely normal for most modern refrigerators. The design of the circuit often involves passing the condenser tubes along one of the side walls (usually the right one, when looking at the closed doors). The second wall can remain cold or slightly warm.
Can a refrigerator heat up if it is empty?
An empty refrigerator should heat up less, since it does not need to cool food. However, if the room is very hot or ventilation is poor, heating of the walls will still be felt. If the empty unit works non-stop and is very hot, check the thermostat or the tightness of the doors.
How long after switching on should the heating stop?
The heating lasts exactly as long as the compressor is running. In normal mode it turns on and off in cycles. If the refrigerator has just been turned on, it may run for several hours in a row until it reaches temperature. After this, it should turn off and the walls will gradually cool down.
Is it dangerous to touch a hot refrigerator?
It is safe to touch the body if the temperature does not exceed 50-60 degrees (the hand is tolerable, but it is hot). If the metal is heated to the point where it is impossible to touch, this is dangerous not so much due to burns as to the risk of fire in nearby materials or breakdown of the unit itself. In this case, diagnostics are needed.
Does the amount of food affect the heating of the case?
Yes, directly. A large volume of warm products requires active operation of the compressor to remove heat. During this period condenser it will release maximum energy, and the walls will be hotter than usual. As the food cools, the heating will decrease.