Delivery of large household appliances is always stressful not only for the owner, but also for the unit itself. When the truck finally pulls up to the house, the natural urge is to immediately unpack the box, install the brand new one in the kitchen and start it up to enjoy the chill. However, haste in this matter can be a fatal mistake that can damage expensive equipment long before the end of the warranty period. refrigerator to the kitchen and start it up to enjoy the chill. However, haste in this matter can be a fatal mistake that can damage expensive equipment long before the end of the warranty period.
Many buyers wonder: why can’t you turn on the refrigerator immediately after transportation if everything is in order with it? The answer lies in the physical processes occurring inside the compressor during movement. Tilts, shaking and vibrations that occur during transportation cause displacement of working fluids, and a certain amount of rest time is required for them to return to normal operation. Ignoring this rule often leads to expensive repairs.
In this article we will analyze in detail the physical principles of the compressor, explain the risks of instant start-up and draw up a clear algorithm of actions. You will learn how to properly prepare equipment for the first turn on and why patience in the first hours after delivery can save you significant amounts of money in the future.
Physics of the process: what happens inside the compressor
The heart of any refrigeration unit is a compressor running on refrigerant and special compressor oil. In normal operation, oil is in the compressor crankcase, lubricating the rubbing parts, and the refrigerant circulates through the system in gaseous and liquid states, providing cooling. These two liquids do not mix in certain components and are in a strictly defined balance.
During transportation, especially if the unit was transported in a lying position or strongly tilted, oil inevitably flows from the compressor crankcase into the refrigerant circuit. It may get into the evaporator or condensertubes. If you turn on the power at this moment, the compressor will try to start pumping not gas, but a viscous oil mixture or even pure oil.
Why is oil so dangerous for the system?
Oil trapped in thin tubes capillary, creates a hydraulic jam. The compressor, trying to push through this plug, works with a colossal overload, which can lead to combustion of the motor windings or mechanical destruction of the piston group.
In addition, with a sharp start without preliminary settling, a hydraulic shock occurs. Liquid, unlike gas, is not compressible. An attempt by the piston group to compress the oil that has entered the cylinder leads to an instantaneous and critical increase in pressure. This can puncture gaskets, break valves or damage the motor-compressor itself.
The influence of ambient temperature on the settling time
One of the key factors The determining factor for how long the refrigerator cannot be turned on after transportation is the air temperature. The viscosity of compressor oil directly depends on the temperature. In the cold, the oil thickens, becoming like honey or even grease, and flows back into the crankcase much more slowly than in the heat.
If the delivery was carried out in winter at subzero temperatures, the process of adapting the equipment is delayed. Bringing a frozen unit into a warm room is another stress. A sharp temperature change can cause the formation of condensation inside electrical circuits and on contacts, which can lead to a short circuit during the first start-up.
⚠️ Attention: It is strictly forbidden to turn on a refrigerator brought in from the cold until it is completely warmed up to room temperature. Condensation on the contacts can cause a short circuit, and cold oil will not have time to drain, which will lead to compressor breakdown.
There is an approximate dependence of the settling time on temperature conditions:
- 🌡️ Summer transportation (+20°C and above): the oil is liquid, drains quickly, 2-4 is enough hours.
- 🍂 Off-season (+5°C...+15°C): medium viscosity, exposure from 4 to 8 hours is recommended.
- ❄️ Winter transportation (below 0°C): the oil is very thick, a minimum is required 12-24 hours for complete drainage and warming up.
Differences in requirements for different types of compressors
Not all refrigerators are the same, and the requirements for their operation after transportation may vary depending on the type of compressor installed. Modern models can be equipped with both traditional piston and more modern inverter engines.
Piston compressors are more sensitive to water hammer. In them, oil can easily get into the cylinder, and the risk of mechanical damage when starting “cold” is maximum. For such units, compliance with the settling time intervals is a critical condition for the survival of the equipment.
Inverter compressors, which can often be found in brand models LG, Samsung or Bosch, operate on the soft start principle. They are less susceptible to sudden changes in load, but this does not mean that they do not need rest. Oil in systems with inverters also tends to migrate through the tubes, and its return to the crankcase is necessary to ensure the durability of bearings and rubbing pairs.
| Compressor type | Sensitivity to oil | Recommended settling time | Risk of breakage in a hurry |
|---|---|---|---|
| Piston (regular) | High | 4-8 hours | High (water hammer) |
| Inverter | Average | 2-4 hours | Average (wear of parts) |
| Linear | Medium/High | 4-6 hours | High (damage to valves) |
Consequences of violating the rules of transportation and starting
Ignoring the recommendation “why you can’t turn on the refrigerator right away” leads to chain reaction of breakdowns. The most common and annoying problem is compressor failure. If oil gets into the system, the compressor begins to work with overload, trying to pump incompressible liquid. This leads to overheating of the electric motor windings and their combustion.
Another scenario is blockage of the capillary tube. The oil, frozen in a narrow channel, blocks the circulation of the refrigerant. As a result, the refrigerator stops cooling, although the compressor may hum. Eliminating such a malfunction requires a complex procedure for pressing the system or its complete replacement, which is technically difficult and expensive.
⚠️ Attention: In the event of a breakdown due to violation of transportation and starting rules, service centers have every right to refuse warranty repairs. An examination will easily reveal traces of oil in the circuit or hydraulic shock.
Problems with thermostat and the starting relay are also possible. If the compressor cannot start due to hydraulic resistance, the start relay begins to click endlessly, trying to start the engine, and eventually burns itself out. This is the lesser of two evils, but replacing the relay and calling a technician is an extra expense and a waste of time.
Can I correct the situation if I have already turned on the refrigerator?
If you turned on the refrigerator immediately and it works fine, you are lucky. But if there are any extraneous sounds, knocking or lack of cold, immediately unplug the device from the outlet. Let it sit for a day. Sometimes this helps the oil return to its place, but there are no guarantees.
Step-by-step instructions: how to properly put the refrigerator into operation
To avoid problems and enjoy your purchase, you must follow a clear procedure after delivery. Proper installation and preparation will not take much time, but will ensure a long life of the appliance.
First, you must carefully unpack the unit, remove all shipping tape and protective film. Pay special attention to internal fixation: in many models, shelves and drawers are secured with tape, and the compressor can be fixed with transport bolts (although in modern refrigerators this is less common, check the instructions User Guide is necessary).
☑️ Preparation checklist refrigerator
Next you should install the refrigerator in a permanent place. It is important to level it horizontally and vertically using the adjustable feet. Using a building level will not be superfluous here. Incorrect installation can lead to distortion of the doors and noise during operation.
After installation, the most important stage begins - waiting. Do not plug in the device immediately. Let it sit for as long as your conditions require (see temperature section). Only after this time has expired can you connect the cable to the outlet.
It is better to do the first start without products. Let the refrigerator run idle for 2-3 hours until it reaches the required temperature and turns off. This will confirm that the thermostat and cooling system are working properly. Only after the first automatic shutdown can you load products.
Frequent errors during installation and operation
Even knowing the theory, users often make mistakes in practice. One of the most common is to install the refrigerator close to the wall. For normal air circulation around condenser (usually a grille at the back or on the sides), a gap of at least 5-10 cm is required. Violation of heat exchange will lead to overheating of the compressor and increased energy consumption.
Another mistake is installing the unit next to heat sources, such as radiators, ovens or in direct sunlight. This forces the compressor to work almost without interruption, trying to compensate for external heat, which drastically reduces its resource.
Some users try to speed up the process of “resting” the refrigerator by installing it near a heater or turning on a hairdryer. Do this absolutely not. Uneven heating can damage plastic body parts, door seals and electronic control boards. Natural heating is the only safe option.
Specifics of transportation in a lying position
The question “why can’t you turn on the refrigerator after transportation” becomes especially relevant if the equipment was transported lying down. Manufacturers strongly recommend transporting refrigerators only vertically. However, if there was no other way out, and the unit was transported on its side, the settling time should be increased.
When transported in a lying position, the oil is guaranteed to flow deep into the system, including the evaporator. In a vertical position, it drains faster under the influence of gravity. In the horizontal position of the tubes, the oil can be retained in the bends.
If your refrigerator was running lying down, the minimum standing time should be at least 12-24 hours, regardless of the time of year. It’s better to play it safe and wait a day than to change the compressor in a week. Also, after recumbent transportation, it is recommended to visually inspect the case for dents that could damage the internal tubes.
Is it possible to transport the refrigerator only in a vertical position?
The ideal option is vertical. But if horizontal transportation is unavoidable, keep the tilt angle to no more than 40 degrees and be sure to increase the standing time to 24 hours.
What to do if the refrigerator makes a lot of noise after turning on?
A slight hum is normal. But if you hear knocking, clanging or whistling, turn off the device immediately. These are signs of oil getting into the system or mechanical damage. A technician's diagnostics is required.
Is it necessary to wash the refrigerator before turning it on for the first time?
Yes, definitely. There may be industrial dust or the smell of plastic or packaging left inside. Wipe the chambers with warm water and a mild detergent and wipe dry.
How long does it take the refrigerator to reach temperature for the first time?
Usually this takes from 2 to 6 hours depending on the volume of the chambers and the ambient temperature. Complete stabilization of the temperature of the food may take up to 24 hours.
Is the smell of plastic dangerous when you first turn it on?
A slight smell of new plastic is acceptable in the first hours of operation. If the smell is sharp, chemical or similar to burnt wiring, turn off the device and contact service.