Do-it-yourself blender repair: fix the damage

Contents:
  • Types of blenders
  • Principle of operation of the stationary blender
  • Replacing the blender knife
  • Repair of the speed controller
  • Blender stopped and the knife does not spin

The blender is a motor on which shaft a special nozzle is placed. 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 lock engine. After the blender, you can work in pulsed or normal mode by pressing the power button. Household appliance is equipped with a speed controller, cord, plug. A fuse may be included.

Are you sure you can handle the repair of the blender with your own hands? In this article we will explain how to disassemble a blender and how to become almost a professional master of repairing blenders. Like most devices, the blender is easy enough to disassemble, as long as the assembly does not leave extra parts.

Types of blenders

To date, three types of blenders are produced:

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

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

The principle of operation of the stationary blender

Let's consider the structure and principle of operation of the blender. Products are placed in the blender bowl. The device turns on and its knife starts to rotate very quickly. The shape of the knife is made so as to force the products to move along a closed path. The knife of the device is located at the bottom of the bowl and fits in with the engine rotor. High speed and desired shape allow you to quickly grind foods. Blender knife is made in the form of a propeller. This allows him to pull products under cutting, and at the same time throw the already crushed mass onto the walls of the bowl.

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

We have described a process that can be observed in high-quality equipment. Cheaper models may not cope with the task. The lack of power does not allow to create a continuous stream of processed products and the knife begins to cut the air. If you decide to chop the cabbage, then add a little water. This will help the knives deal with this vegetable.

If the blender does not cope with the grinding of products, it does not mean that it broke, maybe it just lacks power. Then add some drinking liquid and try running the blender again. If this does not help, then perhaps you should do the repair yourself:

  1. sharpen or replace the knife;
  2. test switch speeds;
  3. to verify the performance of the engine;
  4. check how the bowl connects with the knife.

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

Tip:

See also: Do-it-yourself iron repair

Replacing a blender knife

Unfortunately, not everyone can sharpen such a knife at home. Therefore, you should not experiment better to buy a new cutting tool for the blender. In the store you can face this development:

  • You have purchased a new blender knife. In this case, you must remove the old one and put in its place a new knife. You can do it yourself with a blender; to do this, turn off the blender from the network, remove the bowl from it. We take a clean towel to avoid injury on the sharp edge and begin to unscrew the knife from the engine spindle. The threaded connection here is not standard, but left, so unscrew in the opposite direction. Sometimes the knife is connected with nuts. In this case, you will come to the aid of wrenches and pliers.
  • There are models in which to replace the knife you need to disassemble the blender bowl. There is no problem in this, but do not forget to change the packing for a new one.
  • And finally, the most inconvenient option is when the bowl cannot be disassembled. In this case, you will have to purchase the entire unit: a bowl and a knife.

Speed ​​Controller Repair

Breaking the speed controller in a submersible blender is one of the most common. If so, then the blender is in danger of disassembly. Fully check the performance of this site can only be in the workshop, where there is the necessary equipment. If you have the necessary knowledge in electrics, then you can independently "ring out" this part. You can determine if there is a problem. The regulator is soldered from the blender and it is checked in all positions. For normal operation, in each position the contacts of the regulator 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 unless a bowl is connected to it. This option is classic, because since the invention of the blender, its creator stressed that the equipment will not turn on if the bowl is not installed.

Tip:

Read also: The microwave does not heat but works - what to do?

Blender stopped and the knife does not spin

You decided to chop the stuffing, and the blender just 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, click on the button and listen. Have a quiet buzz? So the engine is working, but it does not work to roll the knife. Disconnect the bowl and with your fingers or with a small screwdriver press the button that blocks the inclusion of the blender. If everything began to work, then the defect is identified.

If the device does not start if the device is locked, it means the engine, more precisely, its windings. One or two of them burned. In this case, you must replace the engine. If you manage to buy it at an affordable price, then you are lucky. But most often its cost is comparable to the cost of a new, not expensive machine, so it is not economically justified to repair such a blender. Easier to buy a new one!

Tip:

Read also: Do-it-yourself repair of a sewing machine

  • First make sure that the electrical outlet is working. To do this, take any household appliance that works, and plug it into a checked outlet. If it earned, then the socket is working, and you should continue to check.
  • The second stage of the test is an electrical cord. Practice shows that he often frays, or breaks off from the inside. We disassemble the body of the blender. In modern household devices, manufacturers love to use special screws, so you need to stock up on various heads and nozzles before disassembling. Do not use a Phillips screwdriver and a flat screwdriver. The cord inside the blender is mounted on a special block with screws or soldering. With the help of a voltmeter we check the cord for integrity. His resistance should be almost zero. If there is no voltmeter, but take a new cord, put in place the old one and plug it into the network. This will determine the damage.
  • If there is a fuse in the circuit of your blender, it should also be tested. Take it out of the nest. If it fails, the thread inside the case will be broken. Repair the fuse, making the "bug" is not worth it. Typically, such items in the store cost a penny, and homemade can cause a fire. On the body of the fuse will be all its technical parameters, write them down, and better take the part with you to the store. The seller will help you find similar. By the way, the fuse socket contacts are a very convenient place to check the presence of voltage in the network.
  • You put a working fuse, and when you turn on the blender in the network, it immediately burned out again! This suggests 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. Connect the ammeter and check the voltage. It is worth doing everything in this case quickly so that the automatic overload protection device does not work in your house. We substitute the shown value into the formula for calculating the power and estimate this value. If it significantly exceeds the nominal, then the source of the problem is found.
  • If after all these actions you understand that everything is fine with power, you need to inspect the printed circuit boards. Often fail capacitors. Visually, this can be determined by their swelling. If a resistor burns out, it becomes black. Interconnecting tracks on the board must not have breaks and detachments. If you find something similar, then the device does not work due to the fault of the electronic unit. If the engine had a short circuit, then the unit can hardly be repaired. It must be replaced with a new one.

Here is the order of work that needs to be done if you decide to repair the blender yourself. If the device fails during the warranty period, the service center should repair it free of charge. It is better not to disassemble and try to repair expensive blender models yourself, but you need to contact a specialized workshop. To date, the cost of an expensive blender can be considered 3000-3500 rubles.

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