DIY blender repair: fixing breakdowns

The blender is a motor with a special attachment on the shaft. This is a fairly simple device. To start working, a bowl with a knife is attached to the motor shaft. This makes it possible to disable the engine blocking. After the blender, you can work in pulse or normal mode by pressing the power button. The household appliance is completed with a rotational speed regulator, cord, plug. A fuse may also be included.

Are you sure you can handle a DIY blender fix? In this article, we will show you how to disassemble a blender and how to become an almost professional blender repair master. Like most devices, the blender is easy enough to disassemble, the main thing is that there are no unnecessary parts left during assembly.

Types of blenders

Today there are three types of blenders available:

1. Stationary
2. Submersible
3. As an option in a food processor.

In all kinds of blenders, the main component is an electric motor. But the principles of operation of a household appliance are somewhat different. Stationary blenders are almost identical in performance to food processors. They consist of two main components: an electric motor and a cookware with a knife placed inside it.

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The principle of the stationary blender

Let's look at the device and how the blender works. Food is placed in the blender bowl. The device turns on and its knife starts rotating very quickly. The shape of the knife is designed to make the products move in a closed path. The knife of the device is located at the bottom of the bowl and mates with the motor rotor. High speed and the right shape allow you to quickly grind food. The blender blade is shaped like a propeller. This allows him to draw in products for cutting, and at the same time throw the already chopped mass onto the walls of the bowl.

The blender bowl has a special shape that allows movement around the processed products. The walls expand towards the top. In this regard, the resulting mass begins to fill the walls, freeing the center of the mold for not yet cut products. As soon as the number of processed products on the wall reaches a critical weight, they fall back onto the knife and further chopping takes place. In practice, all this happens in a matter of moments.

We have described the process that can be observed with quality equipment. Cheaper models may not cope with the task at hand. Lack of power does not allow creating a continuous flow of processed products and the knife starts to cut the air. If you decide to chop the cabbage, add a little water. This will help the knives handle this vegetable.

If the blender cannot cope with chopping food, this does not mean that it is broken, it may simply not have enough power. Then add some liquid to drink and try starting the blender again. If this does not help, then perhaps you should do the repair yourself:

1. sharpen or replace the knife;
2. test the speed switch;
3. make sure the engine is working properly;
4. check how the bowl connects to the knife.

If you decide to repair the blender with your own hands without involving professionals, then you should start by checking the speed regulator. It's simple. It is necessary to press successively different speeds and determine by ear whether the speed of the rotor is changing. If the speed changes, then the regulator is working and it is worth checking the blender knife.

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Replacing the blender blade

Unfortunately, not everyone can sharpen such a knife at home. Therefore, it is not worth experimenting; it is better to purchase a new cutting tool for a blender. In the store, you may encounter the following development of events:

• You have purchased a new blender knife. In this case, it is necessary to remove the old one and put a new knife in its place. You can disassemble the blender with your own hands, for this we disconnect the blender from the network, remove the bowl from it. We take a clean towel so as not to injure ourselves on the sharp edge and begin to unscrew the knife from the motor spindle. The threaded connection here is not standard, but left, so we unscrew it in the opposite direction. Sometimes the knife is connected with nuts. In this case, wrenches and pliers will come to your aid.
• There are models in which you need to disassemble the blender bowl to replace the knife. This is not a problem, but remember to change the oil seal here.
• And finally, the most inconvenient option when the bowl cannot be disassembled. In this case, you will have to purchase the entire block: a bowl and a knife.

Speed ​​regulator repair

Failure of the speed regulator on a hand blender is one of the most common. If so, then the blender is in danger of being disassembled. It is possible to fully check the performance of this unit only in a workshop where the necessary equipment is available. If you have the necessary knowledge in electrical engineering, then you can independently "ring" this part. You will be able to determine if the problem is here. The regulator is fed from the blender and is tested in all positions. For normal operation, in each position the regulator contacts are normally closed.

But before disassembling a household appliance, it is worth listening to whether the speed of rotation of the knife changes when switching speeds.

It should be remembered that in most models, the blender cannot be turned on if the bowl is not connected to it. This option is classic, because since the invention of the blender, its creator has emphasized that the equipment will not turn on if the bowl is not installed.

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The blender has stopped and the knife is not spinning

You decided to grind the minced meat, and the blender simply does not turn on! Don't panic right away! This trouble can be solved even easier than if the device worked, but did everything badly.

First, press the button and listen. Is there a quiet hum? So the engine is running, but it cannot turn the knife. Disconnect the bowl and with your fingers or a small screwdriver squeeze the button that blocks the inclusion of the blender. If everything starts working, then the defect has been identified.

If the device does not start even when the blocking is off, then the matter is in the engine, more precisely, in its windings. One or two of them burned down. In this case, the engine must be replaced. If you can manage to buy it at a reasonable price, then you are in luck. But most often its cost is comparable to the cost of a new, not expensive device, so it is not economically justified to repair such a blender. It's easier to buy a new one!

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If, when the button is pressed, you do not hear the operation of the engine, to make repairs, you need to examine the power supply circuit:

• First, make sure the electrical outlet is working. To do this, take any household appliance that works for sure and plug it into the tested outlet.If it works, then the outlet is working, and you should continue checking.
• The second stage of the check is the electrical cord. Practice shows that it is often frayed, or breaks off from the inside. We disassemble the blender body. In modern household devices, manufacturers are very fond of using special screws, so it is required to stock up on various heads and nozzles before disassembling. You cannot do with a Phillips and flathead screwdriver. The cord inside the blender is attached to a special block with screws or soldering. Using a voltmeter, we check the cord for integrity. Its resistance should be almost zero. If there is no voltmeter, but take a new cord, replace the old one and plug it in. This will identify the breakdown.
• If there is a fuse in your blender circuit, it should also be tested. Remove it from the socket. If it fails, then the thread inside the body will be broken. It is not worth repairing the fuse by making a "bug". Usually such parts in the store cost a penny, and homemade products can lead to a fire. On the fuse body there will be all its technical parameters, write them down, or rather take the part itself with you to the store. The seller will help you find a similar one. By the way, the contacts of the fuse socket are a very convenient place to check the presence of voltage in the network.
• You put on a working fuse, and when you plugged in the blender, it immediately burned out again! This indicates that there is a short circuit inside the blender. The problem is either in the engine or in the control unit. We connect individual units to the electrical network and observe the result. Here it is worth putting a "bug", because a large current can pass through it. We connect the ammeter and check the voltage. In this case, it is worth doing everything quickly so that the overload protection circuit breaker does not work in your house. We substitute the displayed value into the power calculation formula and estimate this value. If it significantly exceeds the nominal value, then the source of the problem has been found.
• If after all these steps you understand that everything is in order with the power supply, you need to inspect the printed circuit boards. Capacitors often fail. Visually, this can be determined by their swelling. If the resistor burns out, then it turns black. The connecting tracks on the board must not have breaks or delamination. If you find something similar, then the device does not work due to the fault of the electronic unit. If the motor has a short circuit, then the unit can hardly be repaired. It must be replaced with a new one.

If you decide to fix the blender yourself, here's the work order. If the device fails during the warranty period, the service center must repair it free of charge. It is better not to disassemble expensive blender models and try to fix it yourself, but you need to contact a specialized workshop. Today, the cost of an expensive blender can be considered 3000-3500 rubles.