Situations when it is necessary to turn off the power household appliancesoccur regularly: be it general cleaning, moving to a new apartment or planned defrosting of the No Frost system. It would seem that what could be easier than just unplugging the cord from the outlet? However, hasty actions often lead to damage compressor or failure of the control electronics.
Many owners do not know that refrigerant under pressure circulates inside the refrigeration circuit, and in oil system Compressor undergoes complex physical and chemical processes that require time to stabilize after stopping. Ignoring these nuances can shorten the service life of the unit.
In this article we will analyze not only the mechanics of the shutdown process, but also explain why timing plays a critical role. You will learn how to prepare equipment for long downtime and what absolutely cannot be done in the first minutes after removing the plug from the socket.
⚠️ Attention: If you plan to turn off the refrigerator due to a malfunction (extraneous noise, burning smell, sparking), do not try to immediately turn it on again. In such cases, diagnostics by a specialist is required.
Physics of the process: why you can’t turn it on right away
To understand the algorithm of the correct actions, you need to look inside of the refrigeration unit. The compressor operates on the principle of a pump that pumps refrigerant and oil. During operation, the oil is in motion, partially mixing with freon and distributed through the pipeline system.
When you suddenly turn off the power to the device, the pressure in the circuit remains high, and the oil does not have time to completely drain into the compressor crankcase. If at this moment, even after a few seconds, the power is applied again, water hammer may damage the valves or the piston itself.
What is water hammer in a compressor?
Water hammer occurs when liquid refrigerant or excess oil enter the piston compression chamber. Since the liquid is not compressed like a gas, this leads to a sharp jump in pressure, which can break the connecting rod or valve group.
In addition, electric motor the compressor at the moment of startup consumes a starting current that significantly exceeds the operating current. If the motor has not yet cooled down or is under a load of residual pressure, the starting winding may burn out, which will lead to expensive repairs.
Modern inverter models, such as LG Linear or Siemens hyperFreshare equipped with complex electronics, which also require time for correct completion of cycles and resetting errors in the controller memory.
Step-by-step instructions: how to safely de-energize the device
The shutdown process must be sequential. First you need to empty the chambers of food. This will not only prevent food spoilage, but will also reduce the heat load on the evaporator, allowing the system to quickly reach temperature balance before stopping.
☑️ Preparing to turn off
After unloading the chambers, find the moment when the compressor is running. Let it complete the cooling cycle and turn off on its own (you will hear a characteristic click of the relay and there will be silence). Only after this, when the engine has stopped naturally, can you remove cord plug from the socket.
If your refrigerator is connected through a surge protector or extension cord, make sure that the button on the filter is turned off before removing the cord itself. This minimizes the risk of a spark arc occurring in the contacts For models with displays and “smart” controls ( in contacts.
For models with displays and smart controls (Smart Home), it is recommended to first press the off button on the control panel, if such a function is provided by the design, and wait 1-2 minutes before extinguishing screen.
How long to wait before turning it on again
This is the most important question that is often ignored. The minimum waiting time before restarting is 10-15 minutes. During this time, the oil has time to drain into the crankcase, and the pressure in the system is equalized.
However, if the refrigerator was turned off for defrosting or transportation, the downtime should be much longer. In the case of transportation in a horizontal position, the unit must be left in a vertical position for at least 4-6 hours (or better yet, a day) before turning on for the first time.
| Shutdown situation | Minimum waiting time | Recommended time |
|---|---|---|
| Short-term shutdown (light surge) | 1-2 minutes | 5 minutes |
| Scheduled defrost | 30 minutes | 2-3 hours |
| Transportation (vertical) | 2 hours | 4 hours |
| Transportation (lying down) | 6 hours | 24 hours |
Violation of this rule is the most common cause of failure start-up relay. If you hear a hum, but the refrigerator does not start, immediately unplug it and let it sit longer.
Preparation for long downtime and moving
If you plan not to use the equipment for a long time (for example, when moving or repairing), simply turn it off from the network is not enough. Moisture may remain inside the chambers, which will lead to the appearance of mold an unpleasant odor.
After defrosting and removing the water, thoroughly wipe all surfaces with a dry cloth. The doors must be left ajar. To fix the position, use special stops or simply place a rolled towel between the door and the body to ensure air circulation.
It is not recommended to tightly seal the cracks with tape, since glue residues are difficult to remove, and complete sealing can preserve moisture. It is better to use soft latches.
⚠️ Attention: When transporting, never leave drawers and shelves inside the chambers without fixation. Vibration during movement can break glass shelves or damage plastic guides.
It is better to secure the power cord with tape on the back wall so that it does not dangle and interfere with movement. Make sure that the wire is not frayed and the insulation is intact.
Features of different types of refrigerators
Different cooling technologies dictate their own nuances. Older models with a drip system require manual defrosting. They cannot be turned off while there is ice in the evaporator, otherwise when melting water will flow into the housing, which can cause corrosion or short circuit.
Systems No Frost and Total No Frost have a more complex condensate drainage system. When turning off such models, it is important to clean the drainage hole so that during defrosting the water does not overflow over the edge of the tray.
Wine cabinets and two-compressor models (where there is one for each chamber unit) require an individual approach. In dual-circuit systems, turning off one compressor does not stop the second, so it is important to wait for silence in both chambers.
Modern “smart” refrigerators may have a function Vacation Mode (Vacation mode). During a short-term absence (up to 2-3 weeks), sometimes it is more advisable not to turn off the device completely, but to activate this mode, which maintains a minimum temperature and prevents the appearance of odor, while saving electricity.
Frequent errors when disconnecting
The most common mistake is pulling the cord by the wire itself, and not by the plug body. This leads to broken contacts inside the insulation, which can cause short circuit or heating of the wiring in the future.
- ❌ Trying to turn on the device immediately after rearrangement. This is a guaranteed way to kill the compressor.
- ❌ Using wet hands when removing the plug from the socket, especially if the floor in the room is wet.
- ❌ Ignoring the condition of the socket. If, when disconnected, you smell burning plastic or see sparks, you cannot operate this power grid power supply
It is also a mistake to store the refrigerator with the doors closed immediately after washing. Even if it seems dry on the outside, moisture remains in the seals, which will become an ideal breeding ground for bacteria.
Is it possible to turn off the refrigerator while it is humming?
Technically, you can pull out the cord at any time, but doing this is highly undesirable. Stopping under load places stress on the compressor mechanics. It’s better to wait for the relay to click and the motor to stop.
What to do if, after turning on, the refrigerator does not freeze?
If you have passed the standstill time, but there is no cold, check if the light inside is on. If there is no light, the problem is in the outlet or cord. If there is light, but there is no cold within 2-3 hours of operation, there may be a freon leak or a compressor failure.
Do you need to defrost the refrigerator before each shutdown?
Yes, if you turn it off for more than an hour. When the remaining ice melts, it will turn into water, which can leak onto the floor or inside technical components. The exception is very short shutdowns to replace the plug or check the socket.