Modern DEXP refrigerator is a reliable household appliance, but even high-quality equipment can fail over time. If your device stops freezing, makes strange sounds, or ice freezes, do not immediately panic or call a technician. In many cases troubleshooting it is possible to do it yourself, having basic skills in working with tools and an understanding of the principles of operation of refrigeration equipment.
The first thing that needs to be done before starting any work is completely disconnect the power aggregate. Unplug the power cord from the outlet and gain access to the back of the device. A careful visual inspection often reveals obvious problems, such as a damaged wire, a burnt-out lamp, or obvious traces of freon leakage in the form of oily spots. Safety is the number one priority when working with electrical appliances.
Next we will look at the main components that most often require the owner’s attention. Understanding how drip defrost works in your model will help you get to the root of the problem faster. In this article, we will analyze step-by-step algorithms for diagnosing and replacing key components so that you can return the refrigerator to working order. No Frost system or drip defrosting in your model will help you quickly find the root of the problem. In this article, we will analyze step-by-step algorithms for diagnosing and replacing key components so that you can return your refrigerator to working order.
Diagnostics of major faults
Before disassembling the unit, you must clearly determine the nature of the breakdown. Refrigerator compartment can work normal, while the freezer will stop cooling, or the device will hum, but not cool at all. Often the problem lies in a violation of the tightness of the circuit or failure of the control electronics. Accurate diagnosis saves time and money.
Pay attention to the behavior of the compressor. If it turns on for a few seconds and turns off with a characteristic click, this may indicate problems with the start relay or the motor itself. In the case where compressor works continuously, but the temperature does not drop, there is likely a refrigerant leak or a clogged capillary tube. It’s also worth checking to see if the defrost button is stuck (if your model has one).
⚠️ Attention: If you hear a hissing sound when the device is turned off or see oily spots on the floor, this is a sure sign of depressurization of the system. Self-refilling with freon requires special equipment and skills; it is better to turn to professionals.
It is also important to analyze exactly when the problem appeared. If after a long defrosting the refrigerator does not turn on, moisture may have entered the contacts of the thermostat. If the failure occurred after a power surge, the control could be damaged. electronic board management.
Checking and replacing the thermostat
One of the most common reasons why DEXP refrigerator stops supporting the desired temperature is a faulty thermostat (thermostat). This element is responsible for turning the compressor on and off depending on the temperature inside the chambers. If it is “stuck,” the compressor may either not start at all, or work without stopping, causing freezing products.
To check the thermostat, it must be removed. It is usually located inside the refrigerator compartment or behind a plastic panel. Test the contacts with a multimeter: when the temperature of the sensor changes, the resistance should change and the contacts should open and close. If the device shows a break or short circuit, the part must be replaced.
When installing a new thermostat, it is important to position the sensing tube correctly. It should fit tightly to the evaporator or fit into a special socket, as it was in the original design. Incorrect installation will lead to incorrect operation of the cooling system.
The replacement process takes a little time, but requires care when removing the plastic latches Old plastic pieces can be brittle, so avoid sudden movements. After replacement, check the operation of the unit in test mode.
Repair of the defrost system and heating element
In models with the system No Frost the proper operation of the defrost system is critically important. If you notice that a “coat” of ice is growing on the back wall of the freezer, and the fan is humming or touching the ice crust, the problem is most likely in the defrost heating element, defrost sensor or timer. Without regular defrosting of the evaporator, cold will stop flowing into the chambers.
For diagnostics, you need to remove the back panel in the freezer. Visually inspect the heating element (heating element) for breaks in the filament. Test it with a multimeter: a working heating element should show resistance within normal limits (usually 200–500 Ohms). Also check defrost sensorwhich controls the temperature of the evaporator.
| Component | Fault symptom | Check method | Solution |
|---|---|---|---|
| Defrost heating element | Ice build-up on the evaporator | Break test | Replacing the heating element |
| Sensor defrost | The heating element does not turn on or constantly heats | Resistance measurement | Replacing the sensor |
| Defrost timer | Violation of work cycles | Checking contacts | Replacing the timer |
| Fan | Noise, lack of circulation | Visual inspection, scrolling | Lubrication or replacement |
If all elements of the circuit are working, but the system does not work, the problem may be in the control board, which does not supply voltage to the heating element. In some models DEXP the thermal protection fuse of the heating element burns out, which also requires replacement.
☑️ Diagnostics of the No Frost system
Replacing the compressor start relay
If, when you turn on the refrigerator, you hear a quiet hum that lasts 5-10 seconds, followed by a click and silence, this is a classic sign of a faulty start relay. The start relay is responsible for starting the compressor motor. Over time, the contacts inside it burn out, or the bimetallic plate loses its properties.
Replacing this part is one of the simplest repair operations. The relay is usually mounted on the side of the compressor and snaps into place with plastic clips. Carefully remove it, after photographing the position of the wires. Shake the relay near your ear: if you hear a ringing inside (as if from a broken ceramic core), the part definitely requires replacement.
The new relay must exactly match the compressor model. Install it in the vertical position (usually with the arrow pointing up) as set by the manufacturer. Incorrect orientation can result in rapid failure of the new part. After installation, turn on the refrigerator and listen: the compressor should start smoothly and operate without periodic clicks.
⚠️ Attention: Before replacing the relay, make sure that the compressor itself is not jammed. If after replacing the relay the situation repeats and the compressor hums but does not start, a more serious repair of the motor may be required.
Fixing problems with the fan
In DEXP refrigerators with the system No Frost The fan is responsible for circulating cold air. If you hear a loud noise, crackling or humming noise coming from your freezer, the problem is most likely in the fan. It may get stuck in the ice crust, or its bearings may have worn out.
To repair, remove the back cover in the freezer. Check if the fan blade rotates freely. If ice interferes, defrost the unit within 24 hours. If there are no mechanical obstacles, but the noise persists, or the fan does not spin at all, it must be replaced. Lubricant The bushing often gives only a temporary effect.
Why does the fan hum?
Often the cause of the hum lies in the misalignment of the fan housing or contact of the wire with the blades. Before replacing, make sure that all the wires inside the freezer are securely fastened and are not loose.
When purchasing a new fan, pay attention to the supply voltage (usually 220V or 12V) and the geometric dimensions of the seat. An incorrectly selected fan may not create the required air pressure, which will lead to deterioration cooling quality products.
Replacing sealing rubber
A poorly fitting door is a common cause of ice freezing and increased consumption electricity. Sealing rubber Over time, it loses elasticity, cracks or deforms. Check the tightness of the door using a sheet of paper: clamp it between the door and the body around the perimeter. If the sheet is removed too easily, the tightness is broken.
You can restore old rubber by heating it with a hairdryer or pouring boiling water into the deformed areas, but this is a temporary measure. For high-quality repairs, it is better to purchase a new seal specifically for your model DEXP. Installation requires care: the rubber is inserted into a special groove around the perimeter of the door.
Before installing a new seal, it is recommended to warm it in warm water so that it becomes softer and fits into place more easily. After installation, the door may close a little tightly - this is normal; after a couple of days the rubber will “sit down” and wear out. Regular cleaning the seal will extend its service life.
Frequently asked questions (FAQ)
Why does the DEXP refrigerator make gurgling sounds?
Gurgling is a normal sound of refrigerant circulating through the system pipes, especially immediately after the compressor stops. If the sound is not accompanied by a lack of cold, there is nothing to worry about.
How often should you defrost a No Frost refrigerator?
The No Frost system does not require manual defrosting to remove ice, but it is recommended to turn off the device once every 6-12 months for general cleaning and disinfection. general cleaning and disinfection.
Is it possible to replace the compressor yourself?
Replacing the compressor requires evacuation of the system and charging with freon. This requires special equipment. Without skills and tools, it is better to entrust this work to a service center.
What to do if the refrigerator smells like plastic?
A new smell of plastic in the first days of operation is acceptable. If the smell appears sharply in the old appliance, check the wiring for melting and make sure that the products do not touch the hot parts of the condenser.