The decision to purchase a used refrigerator is often dictated by the desire to save money or find a reliable model that has been discontinued. The secondary market for household appliances is huge, but here it is easy to run into a faulty unit, which will require expensive repairs after just a month of operation.
Unlike new equipment, where you are guaranteed to receive a working device, purchasing used refrigerator requires a thorough diagnosis of all systems. An error in the choice can lead to damage to the products and additional expenses exceeding the cost of the purchase itself.
In this article we will analyze the key aspects of the inspection, starting from external inspection and ending with compressor testing. You will learn how to identify hidden defects and what technical nuances you should pay special attention to before the transaction.
Visual inspection of the case and equipment
The first thing that catches your eye is the appearance. However, scratches on the case are just the tip of the iceberg. Carefully inspect the back wall where condenseris located. If the grille shows traces of rust, blistering paint, or, worst of all, traces of soldering, it is better to refrain from purchasing it. This may indicate a leak freon or poor-quality repairs in the past.
Pay special attention to the doors and sealing rubber bands. The door should open and close with a characteristic bang, but without excessive force. If seal he is cracked, has creases or comes away from the body, the seal of the camera is broken. This will lead to constant operation of the compressor, icing and increased energy consumption.
⚠️ Attention: If, when the door is opened 45-60 degrees, it slams itself and does not smoothly close to the end, it means that the hinge mechanism is worn out or the body of the device is skewed.
Check the interior for cracks, especially in the corners of the plastic chambers. Cracks can become breeding grounds for bacteria and mold, which are almost impossible to get rid of. Also make sure that all shelves, vegetable drawers and egg trays are present, as it can be difficult to find original components for older models.
Pay attention to the condition of the power cord. It should not have creases, traces of melting or signs of interference with the structure. Damaged insulation is a direct risk of a short circuit.
Diagnostics of the compressor and cooling system
The heart of any refrigerator is compressor. When you turn on the device, listen to its operation. The sound should be smooth, monotonous, without knocking, clanging or sharp metal creaks. Only a quiet hum and periodic gurgling of the refrigerant in the tubes is allowed.
After 15-20 minutes of operation after turning on, touch the condenser (black grille on the back) and the side walls (if the model has a foamed condenser). They should heat up evenly. If one part of the pipe is hot and the other cold, or if there is no heating at all, this is a sign bottom of the capillary or a gas leak.
- 🔊 A loud knock or clanging sound when starting indicates destruction of the motor suspension inside the casing.
- 🔊 An intermittent buzzing sound with clicks indicates a faulty start relay.
- 🔊 A complete lack of sound while the light inside is on may mean an open circuit or a burned out compressor.
It is important to check how often the unit turns on. If the refrigerator runs continuously and does not turn off for more than 40 minutes without reaching the set temperature, this is an alarming signal. The tightness of the circuit may be broken or the thermostat has failed.
Why can the compressor heat up?
The compressor can heat up to 90 degrees, this is normal during active operation. However, if it is hot to the touch, but the refrigerator does not freeze, most likely there is a violation of the freon circulation.
Checking the defrosting system and evaporator
In modern models and middle-aged units, the No Frost or Low Frost system is often found. When purchasing such a device, be sure to look into the freezer. There should be no thick layer of ice or “fur coat” on the walls. The presence of ice in the No Frost system indicates a malfunction of the defrost heating element, timer or sensor.
If you are considering a classic drip system, inspect the back wall of the main chamber. It should be evenly covered with frost or droplets of moisture (depending on the cycle), but not have huge ice build-ups in one corner. This may indicate a misalignment of the device or problems with condensate drainage.
Check the water drainage hole (drain) at the bottom of the rear wall of the refrigerator compartment. It must be clean. A clogged drain will cause water to pool at the bottom of the refrigerator and leak out.
Electronics, controls and additional functions
Modern refrigerators are equipped with electronic control modules, displays and sensors. When inspecting, turn on all available modes. Check the operation of indicators, buttons and rotary controls. If errors appear on the display (for example, flashing temperature symbols), this may indicate a malfunction of the sensors or control board.
Pay special attention to the system air circulation in models with No Frost. Blow your hand on the openings of the air ducts - cold air should come out of them. If the fan is humming, but there is no airflow, the evaporator may be frozen or the impeller is broken.
On models with ice makers or a fresh zone, check the operation of these options. Mechanical "Super Freeze" switches should shift smoothly without sticking. Electronic settings must be reset and installed correctly.
| Type of malfunction | External sign | Probable cause |
|---|---|---|
| Not freezing | The compressor is working, there is no cold | Freon leak, capillary blockage |
| Constant cold | Food freezes in the refrigerator compartment | Faulty thermostat or sensor |
| Noise and vibration | Loud hum, rattling | Compressor wear, misalignment, ventilation |
| Water on the floor | Puddles around the device | Drainage clogged, tray displaced |
If the refrigerator is equipped with an inverter compressor, it should operate almost silently, gradually picking up speed. Sharp jumps in sound are uncharacteristic for such equipment and require diagnostics.
Transportation and installation at a new location
After a successful purchase, the question of delivery arises. It is strictly forbidden to tilt the refrigerator over a sharp corner or place it on its side without following the rules. If the inclination is more than 40 degrees, oil from the compressor may flow into the refrigerant circulation circuit, which will lead to water hammer and breakdown of the unit upon first start-up.
If transportation in a vertical position is not possible, lay the refrigerator on its side opposite the outlet of the pipes from the compressor (usually this is indicated in the instructions or can be seen by the location of the pipes). After delivery, the device must stand in a vertical position for at least 4-8 hours (or better yet, a day) before turning it on.
⚠️ Attention: Never turn on the refrigerator immediately after transportation, especially in the cold season. Condensation inside the electronics and congealed oil can damage the equipment. Let it warm up to room temperature.
When installing, make sure that there is a gap of at least 5-7 cm between the back wall of the refrigerator and the wall of the room for normal ventilation of the condenser. Lack of clearance will lead to overheating and shortened service life.
Typical buyer mistakes and hidden risks
One of the main mistakes is buying “from hand” without checking the work. Sellers often turn on the refrigerator 10 minutes before the buyer arrives so that it starts freezing. However, it is impossible to identify a real problem with cyclical operation or leakage in such a time.
Another risk is the purchase of very old models (15-20 years) of supposedly “indestructible” quality. Even if they work, their energy efficiency is extremely low (class C, D, E), and the wear of rubber seals and insulation reaches critical levels. Savings on the purchase can be completely eaten up by electricity bills.
- 🚫 Purchase without a receipt or warranty card (if the period has not yet expired).
- 🚫 Ignoring the smell inside the chambers is a sign of mold or burnt wiring.
- 🚫 The belief that “you just need to replace the freon” is a complex procedure that requires vacuuming and finding leaks.
You should also be wary of models in which the compressor was replaced with a universal Chinese analogue. The quality of such a replacement often leaves much to be desired, and the service life of such a motor rarely exceeds a couple of years.
Inspection checklist before payment
To systematize the inspection process, use the following algorithm of actions. Do not hesitate to ask the seller to demonstrate the operation of the equipment - this is your guarantee.
☑️ Checking a used refrigerator
Go through each item on the list. If you cannot get a confident answer to at least one point or you observe a defect, weigh the risks again. Remember that refrigerator repair is an expensive procedure, often comparable to 50-70% of the cost of a used unit.
In conclusion, buying a used refrigerator can be a great deal if you approach it with a cool head and attention to detail. A technically competent inspection will allow you to weed out faulty items and find a reliable assistant in the kitchen.
FAQ: Frequently asked questions
How long should the refrigerator sit after transportation?
If the refrigerator was transported in a vertical position, 2-3 hours is enough. If in horizontal mode - at least 8 hours, and preferably 24 hours. In winter, the settling time increases to a day so that the oil and condensate return to normal.
Is it possible to replace the sealing gum yourself?
Yes, this is possible. New rubber bands are sold at parts stores. Before installing, it is recommended to keep the new rubber band in warm water so that it becomes more elastic, and to warm up the already installed rubber band with a hairdryer for a better fit.
Why does the refrigerator click but does not turn on?
Most often this indicates a malfunction of the compressor start relay or an attempt to start a jammed motor. Diagnostics by an electrician is required.
Is it normal that the side walls of the refrigerator are hot?
Yes, this is normal for many modern models where the condenser is built into the side walls. They heat up during operation to release heat.