Thermos doesn't keep warm

Progress does not stand still and today an impressive number of devices have been invented that can significantly make a person’s life easier. One such device is a thermos.

The market offers a wide range of different devices, differing from each other in general characteristics, volume, price and quality.

It is very important not to get lost in all this variety of brands and make the right choice. But what if the thermos, which served faithfully, suddenly stopped keeping warm? Let's take a deeper look at this issue and try to find ways to solve the problem.

Why doesn't a thermos keep warm?

There is quite a bit of information on the Internet about why the thermos suddenly stopped keeping warm - just assumptions and reasoning.

A large number of people note that at first the product did an excellent job of its direct responsibilities, but then suddenly stopped retaining heat. Why is this happening? There may be several reasons for this.

• A failed plug. The most common cause of device malfunction. Either the cork was initially of mediocre quality, or it was twisted too much, which caused deformation and cracks. It is very easy to check how tight the lid is.It is enough to turn it over and see if liquid leaks through the closed lid.
• As for dishes with a glass flask, the cause may be poor-quality silver plating. In most cases, this is a manufacturing defect, since it is quite difficult to scratch due to its location. The silver coating is located on the outside of the inner cylinder and is protected by a vacuum and a housing.
• No vacuum. If you look at the issue in more detail, then underneath the outer bottom there is also an inner one. At the inner bottom there is a thin copper tube with a rather flattened end. It is through this hole that air is pumped out of the thermos in production using a special pump.

What causes a thermos to lose its heat-saving properties?

This dishware is very delicate and requires careful handling. During operation, it is strictly forbidden to drop the device or allow strong impacts on other surfaces. This is especially true for dishes with a glass flask, which can burst if used improperly.

In addition, you should remember that you should not immediately pour hot drinks into a thermos brought from the cold. It is necessary to let the cookware warm up and only then use it. The manufacturer, as a rule, prescribes this nuance in the instructions for the cookware.

Is it worth repairing?

In most cases, the owner of a broken thermos does not think about repairing it and purchases a new one. It would seem, well, how can you repair it?

Depending on the breakdown, you can find a way to restore the thermos and use it further. If the problem is in the lid, then it will be enough to select a suitable stopper for the dish.This will not be difficult to do, since many people sell their faulty thermoses for a purely symbolic price.

If the thermos does not function due to broken vacuum, it can be restored by contacting a refrigerator repair service. The technician will pump out the accumulated air through a copper tube, and the tip will be sealed. But this method is best used if the thermos was expensive. As for cheaper models, it is better to think about buying new cookware. Otherwise, repairs risk costing more than the original cost of the device.

Important! If the silver coating on a glass container is damaged, then it is advisable to think about buying a new thermos. The thing is that this breakdown most likely cannot be eliminated.

Buying Tips

It is impossible to check the dishes before purchasing. Here you should rely on the brand of the thermos and its price. A more expensive sample will most likely be of higher quality than cheaper analogues. Therefore, it is better to give preference to a well-known brand that has proven itself well.

• You should carefully inspect the product before purchasing. Check how tightly the lid fits and whether the dishes are making any extraneous sounds.
• Smell it, a high-quality thermos will not have an unpleasant odor.
• You should pay attention to the quality of the material from which the dishes are made. If the material is in doubt, looks unreliable and fragile, it is better to refuse the purchase.
• For long trips, it is recommended to choose a large capacity container. It retains heat much longer.
• Models in the form of a siphon have one significant disadvantage. They retain heat less well due to the characteristics of the cork. It is not completely sealed.
• It is better to give preference to models made of stainless steel. They retain heat better than analogues made from inexpensive plastic.
• The material of the flask plays an important role. Thermal glass cools down more slowly due to the silver coating.

Tips for use

Before filling with hot liquid, it needs to be prepared. To do this, take a small amount of hot water, pour it inside and leave for a few minutes.

This procedure is done to warm up the welds, in order to avoid a strong temperature difference inside the flask. Even a metal thermos should not be thrown or hit. Nothing in it will break, unlike a glass flask. But from an impact, the welds can develop a microcrack, which can lead to a violation of the vacuum inside the cookware.

Attention! Under no circumstances buy a thermos from hand or on the subway. The chance of buying low-quality dishes is quite high, and no one will be held responsible for the quality of the product.

In custody

Choosing a good product is quite simple; you just need to follow the basic recommendations described in this article. There is no need to save money and choose a cheaper option.

It is better to purchase a more expensive thermos that will last for many years. And of course, no one has canceled the rules for using this type of cookware. The more carefully you handle it, following the instructions, the longer it will remain operational and will not cease to maintain the desired temperature of liquids.