Operating old household appliances requires a special approach, especially when we are talking about procedures that modern models perform automatically. Soviet refrigerator is a reliable unit created in an era when energy efficiency gave way to maintainability and durability. However, the absence of a No Frost system imposes on the owner the obligation to regularly manually defrost the freezer.
Incorrect actions when removing ice can lead to damage evaporator or failure of the compressor, which for equipment of the 60-80s will mean the impossibility of further repairs. In this article we will analyze all the nuances of the process, starting from preparation and ending with the first start after service.
Many owners make the mistake of trying to speed up the process by mechanically chipping ice or using hair dryers at maximum power. It is critically important to understand that the aluminum evaporator tubes in older models are extremely thin and can easily be pierced by a sharp object. Compliance with technology will preserve the functionality of your ZIL or Biryusa for many years.
Preparing for the defrosting procedure
The first step is to completely empty the internal space of food. You need to plan in advance the time when the equipment will be unplugged, since the entire process can take from 4 to 12 hours depending on the thickness of the ice crust. All perishable foods should be transferred to another cold place or use thermal containers with ice.
Next you need to find a temperature regulator. In most Soviet models, it is a rotary knob with numbers or a TAM-type thermostat. Set the knob to the “0” or “Off” position, then remove the plug from the socket. Defrosting should only be carried out when the unit is completely de-energized.
Prepare a container to collect melt water. Since old refrigerators often do not have a special gutter for draining water outside the body, you will need:
- 🧽 Absorbent rags or floor towels
- 🥣 A wide basin or several deep bowls
- 🧹 A mop for quickly removing water from floor
- 🧤 Rubber gloves to protect your hands from the cold
⚠️ Attention: Before starting work, make sure that the floor around the refrigerator is protected from water, as moisture can damage the laminate or cause swelling of the parquet.
Natural defrosting: the safest method
The most gentle way for technology is natural thawing. After turning off the power, leave the freezer and refrigerator doors open. The circulation of warm air will start the process of melting the ice. Depending on the room temperature, complete thawing may take up to a day.
A large amount of water may form inside the chambers. If your model ZIL-63 or an analogue does not have a drain hole, the water will have to be scooped out with a ladle or removed with a sponge as it accumulates. Do not allow water to overflow over the edge of the freezer onto the shelves of the lower compartment.
To speed up the process without the risk of damage, you can use the convection method. Place a bowl of hot water (not boiling water!) in the freezer. Change the water as it cools. Warm steam will gently warm the inner walls, accelerating the separation of ice from the metal body metal case.
Accelerating the process: acceptable and prohibited methods
Sometimes there is no time to wait for natural thawing, and owners are looking for ways to speed up the procedure. There are several methods, the use of which requires extreme caution. The main rule is to avoid sudden changes in temperature, which can cause deformation of the metal or cracks in the plastic.
It is strictly forbidden to use sharp objects (knives, chisels, screwdrivers) to chip ice. The aluminum evaporator in older models is located directly under the ice layer, and a breakdown of the tube will lead to an instant release of refrigerant. Repairing such a malfunction is often not economically feasible.
It is permissible to use a hair dryer, but only at a minimum temperature and from a distance of at least 30-40 cm from the ice surface. Direct the air flow not to one point, but move the nozzle over the entire area. Overheating of a local area can lead to paint peeling or deformation of the plastic.
Comparison of defrosting methods:
| Method | Safety | Speed | Risk of damage |
|---|---|---|---|
| Natural melting | High | Low (6-12 hours) | None |
| Bowl with hot water | High | Medium (2-4 hours) | Minimum |
| Hairdryer (warm air) | Medium | High (30-60 min) | Average (overheating) |
| Mechanical chipping | Low | High | Critical (breakdown) |
Cleaning internal surfaces after defrosting
After all the ice has melted and the water has been removed, you need to thoroughly wash the internal chambers. During operation, bacteria may have settled inside or an unpleasant odor may have appeared, which has been absorbed into the rubber seals and plastic.
Use a weak solution of baking soda (1 tablespoon per liter of water) or a special product for cleaning refrigerators. Avoid using aggressive chemicals, abrasive powders or chlorine-containing products that can damage the coating.
Pay special attention to the rubber seals on the doors. Wipe them with a damp cloth, removing all dirt from the folds. If the seal is contaminated with grease, use a mild dishwashing detergent. The cleanliness of the seal directly affects tightness the fit of the door.
☑️ Check after washing
Drying and first start-up of equipment
The refrigerator must be completely dry before turning it on. Moisture that gets into electrical contacts or the thermostat can cause short circuits or corrosion. Leave the doors open for another 30-60 minutes after completing wet cleaning.
Make sure that the area around the cabinet, especially the back where the condenser is located (black grill), is dry and clean. Dust on the radiator reduces the efficiency of heat transfer, causing compressor to work with overload. If necessary, carefully vacuum the back wall.
After turning on, let the unit run empty for 1-2 hours. During this time, it will reach the required temperature, and the thermostat will turn off the motor. Only after reaching the operating mode can you add food.
⚠️ Attention: Do not load the refrigerator with food immediately after turning it on. A sharp increase in thermal load will force the compressor to work without stopping, which can lead to its breakdown.
Why does the refrigerator hum after defrosting?
Sometimes after a long defrost and the first start, the refrigerator may hum louder than usual. This is due to the fact that the oil in the compressor may have drained into the system, or the position of the unit on the floor has changed. If the humming is not accompanied by knocking and vibration, it should go away after a few hours of operation.
Frequent errors and precautions
Owners of vintage equipment often forget about the specifics of old refrigerants. Soviet refrigerators used freon, which is safe for humans, but can form toxic compounds when in contact with an open flame (for example, if you decide to heat the wall with a blowtorch).
Another common mistake is ignoring the condition of the electrical cable. Before turning it on after defrosting, carefully inspect the wire for cracks and creases. The old insulation may have cracked due to time and temperature changes.
Follow the following safety rules:
- 🔌 Never plug in a wet refrigerator
- 🔥 Do not use open fire to speed up defrosting
- 🧊 Do not pour boiling water directly onto the shelves and walls
- 🛠 Do not try to repair the wiring yourself without skills
⚠️ Attention: If after defrosting and turning on the refrigerator does not cool, but the compressor is working, it is possible that an ice plug has formed in the circulation system or a freon leak has occurred due to microcracks. Diagnostics by a specialist is required.
Questions and answers for operation
How often should a Soviet refrigerator be defrosted?
The optimal defrosting frequency depends on the humidity in the room and the frequency of door opening. On average, the procedure is recommended to be carried out once every 3-4 months, or when the thickness of the ice crust reaches 5-7 mm. More frequent defrosting is not required and may even be harmful for old seals.
Is it possible to leave the refrigerator to defrost overnight?
Yes, this is even the preferred option. Natural defrosting overnight (8-10 hours) is guaranteed to remove all ice without the risk of damaging the evaporator. Just make sure that the doors are securely locked in the open position and the water from the tray will not spill onto the floor.
What to do if a strong odor appears after defrosting?
If simple washing does not help, use activated carbon or special odor absorbers. Place the charcoal tablets on saucers inside the chambers for a day. Ventilation with the doors open during the day also helps effectively.
Why does the refrigerator not turn off for a long time after defrosting?
When first started after defrosting, the compressor may work longer than usual, since it needs to cool not only the air, but also the heated walls of the chamber. If the operating mode does not return to normal after 3-4 hours, check the integrity of the door seals and the position of the thermostat.