DIY kitchen hood engine repair

In detail: do-it-yourself kitchen hood motor repair from a real master for the site my.housecope.com.

A working hood must absorb all vapors and odors

Hood malfunctions in the kitchen deprive the inhabitants of a house or apartment of their usual comfort - unwanted odors are carried through the rooms, condensation accumulates on the walls and windows, and the air itself becomes harmful to health.

In the event of a breakdown of the kitchen ventilation system, many immediately turn to workshops and service centers, which, for a considerable fee, repair kitchen hoods. But, this kitchen equipment, even with additional functions, is not too complicated, and it is quite possible to repair it with your own hands.

The primary function of any hood is to remove air saturated with vapors and odors from the room. Therefore, the kitchen owners suspect poor-quality ventilation when condensation appears on the windows. An increased cooking odor also indicates that the kitchen exhaust ventilation equipment is not doing its job, although the motor is running.

The accumulation of condensation on the kitchen windows indicates poor performance of the hood.

In this case, there are two possible reasons for the poor-quality operation of the hood:

Hood filter and grease trap clogged;
The exhaust duct is clogged.

Filter cleaning and other maintenance work should be described in the manufacturer's instructions. Since there are many different hood designs, it is not possible to give a universal description of this process.

But, having carefully studied the instructions, almost any user will be able to do a simple filter cleaning with his own hands, as shown in the video:

Video (click to play).

Users often complain: “We bought a high-quality Cata hood, installed it, everything works, but there is little condensation on the windows, too.” If the hood is installed for the first time, be sure to check the draft of the exhaust duct - if there is no air circulation in it, then no matter how powerful the fan is, it will not be able to blow out water vapor and odors from the kitchen.

Air duct without visible traces of clogging

Checking the draft is done with a lighter (the flame should be deflected by the air flow) or by applying a sheet of paper to the ventilation grill. If the exhaust duct in a private house is clogged, then it can be cleaned with your own hands, and in an apartment building, most likely, you will have to contact the appropriate services.

Checking the ventilation draft by deflecting the flame

If for some reason it is impossible to clean the ventilation duct, then in order for the hood to function, its outlet pipe must be brought out in another way - for example, by making a hole in the wall, or changing the window frame.

Checking the traction with paper - the sheet should press against the grate

If the exhaust fan does not work at all, then the following reasons are possible:

Poor contact in the socket, plug, the power cord is broken or there is no voltage;
Blown fuse;
The connection terminals inside the hood casing are loose, or the wires are unsoldered;
Malfunction in buttons or switches;
If the hood has an electronic control interface, there may be breakdowns in the electrical board, relays, sensors, etc.
Fan motor defective.

When starting to repair the hood, you need to look for malfunctions, excluding the possible causes indicated above, alternately going through the points.

Troubleshooting inside the hood

Initial diagnostics of the hood is made by turning on the built-in light bulb.But, due to overvoltage, all components of the hood may fail, or at best, the fuse may blow. Checking the wiring and fuse, measuring voltage and repairing the outlet are described in detail in other articles of this resource.

To get to the internal connection terminals, you need to disassemble the hood casing, having previously disconnected the power cord from the outlet. Due to the vibration of the fan, the terminal bolts may loosen and the contact will disappear. If checking and tightening the bolts fails, proceed to the next step.

Check the reliability of the connection terminals of the exhaust fan

You can check the buttons and speed switches with an ohmmeter (tester, multimeter in continuity mode) or a probe (factory or homemade). Since the motor windings connected to the switches have low resistance, when tested with a probe, they can affect the false operation of the indicator, so the terminals should be disconnected first.

At home, without skills and tools, repairing an electric motor is impossible, so you will have to look for an identical or suitable replacement.

As a rule, capacitor single-phase electric motors are used in hoods, to familiarize yourself with the principle of their operation and test methods, follow the link provided. The electric motor for the hood has several taps from the windings, which are switched to change the fan speed.

Exhaust motor connection diagram with outputs for speed switching

It is also possible that the starting capacitor, relay or electronic control unit malfunction. Sometimes, if a complex electronic circuit cannot be repaired, it can be replaced with a simpler solution based on reliable mechanical switches, as shown below:

So that there is no need to repair the hood in the kitchen with your own hands, you should purchase equipment from reliable manufacturers. Cheap goods from China are very often short-lived in operation, create a lot of noise and, at the same time, are ineffective with significant energy consumption.One of the leaders in the production of kitchen equipment is Cata. The specialists of this Spanish company produce not only kitchen hoods, but also a wide range of kitchen electrical appliances - ovens, hobs, microwave ovens that work properly all over the world.One of the classic Cata range hoodsBuying such high-quality equipment as from Cata, Elica, Electrolux, Krona, etc., will allow the user not to worry about the health of the cooker hood for a long time. But nevertheless, sometimes due to the reverse thrust, the fan itself becomes clogged or other unforeseen circumstances occur.Therefore, from time to time, you will have to clean the filter with your own hands, change the light bulbs, do a routine inspection of the hood, as shown in the video:

Read also: Do-it-yourself grundfos pump

For most people, the kitchen has long ceased to be a utility room where food is prepared, food is cleaned, and dishes are washed. The family often gathers here.

It's one thing if your cooker hood is already a dozen years old and has been weakly drawing air lately. Here it is already possible not to think about repairs, it is easier to buy new equipment. But what if the purchase has not served you for a year, and the fan is no longer able to cope or is completely out of order? The first step is to find out the cause of the malfunction, and then fix it on your own. The main "culprits" of breakdowns can be:

All these reasons can lead to failure and further repairs, so take into account all the points for the future so that this situation does not arise again!

Now we will proceed as follows: we will list all existing faults in turn and provide instructions on how to repair a hood in the kitchen with our own hands under each one. Breakdowns will be listed from most common to least likely to occur and harder to repair at home.

Very often, the exhaust panel is used to illuminate the work area in the kitchen. This is really convenient and is a smart approach, because in modern technology, powerful LED lamps or halogens are installed.

If your lighting does not work, you must take the following repair measures:

Check the light bulb itself, it may have burned out.
Turn on the fan to see if it works. If the blades are not spinning either, we will talk about how to repair the system a little below. The engine is running - we are looking for the malfunction further.
Check the voltage at the outlet with an indicator screwdriver. Immediately look at the switchboard, possibly knocked out a machine gun. Is the socket working? If so, you need to check the integrity of the electrical cord, then ring the backlight switch and the rest of the circuit with a multimeter. Thus, by elimination, you will find the cause of the malfunction and you will be able to proceed to repairing the hood in the kitchen with your own hands. Usually, hands do not reach this point, tk. most often the light bulb burns out or the socket fails.

The second most popular malfunction of a kitchen hood is that the fan does not pull out well. Not sure what to do in this case? Things are easier here. First of all, check if the filters and grease trap are dirty. Most often, these two components are responsible for the fact that the hood does not draw air into ventilation or does not ventilate well.

In order to repair the hood with your own hands, you need to clean the filters and re-enable. You can see how to properly clean in this video lesson:

Another possible situation is the occurrence of a vacuum in a room with closed windows. As a result, the hood will pull weakly or stop drawing air at all.In this case, the repair consists in the fact that you yourself need to open the vents and ventilate the kitchen in a natural way.

Another reason that the hood pulls poorly is the lack of draft in the ventilation duct of the house. In this case, you can check the presence of traction with an ordinary lighter - light a fire and bring it to the ventilation hole in the wall, as shown in the photo. If the flame does not suck into the ventilation hole, it will be necessary to make forced ventilation, which we will talk about below.

If nothing happens when you turn on the button on the panel, it will be much more difficult to repair the hood in the kitchen yourself. This is exactly the case that we talked about above - and the fan does not turn and the light does not turn on. First you need, again, to check the electrical cord, the voltage at the outlet and the machine in the dashboard. If everything works, take a multimeter in your hands and go to the "continuity" of the circuit. First of all, you need to test the switch on the panel, perhaps one of the contacts has burned out (usually the first one). Then look at the diagram where the fuse is located, which burns out at least often.

Is the fuse in working order? Check the capacitor, if its resistance is normal and does not seem to swell, most likely the engine does not work. We talked about how to check a capacitor in a separate article. The motor windings need to ring and if the malfunction lies in an open circuit in the motor area, it is better to throw it out and buy a new one, because it will be very difficult and impractical to repair the part.

If the cooker hood hums when it is turned on, it may be due to poor manufacturing quality. A lot of negative reviews about the increased noise level can be found on the Internet. The answer to the question why the system is noisy is quite simple - poor-quality assembly of the product, which in this case cannot be repaired by hand. For example, at such firms as Cata, Kronasteel and Elikor, the rumble during operation is practically inaudible even at maximum speed. We recommend that you immediately familiarize yourself with how to choose the right range hood for your home in order to know the names of the best manufacturers of kitchen appliances!

If you are sure of the quality of the selected product and you probably know that something else is wrong, we recommend that you check the quality of the fixing of the case to the wall / kitchen set. Even a small vibration gap can cause knocking, rustling, ringing. To prevent the equipment from making noise, it is necessary to do the following - tighten all the fasteners or put a piece of foam rubber in the problem area, which will eliminate the knocking.

If the engine hums but won't start, the most likely cause of the problem is the fuse. Do-it-yourself hood repair in this case is quite simple - you need to replace the fuse with a new one.

Everything is obvious here - the button in the control unit does not function. You must remove the protective shield and visually inspect the button as maybe the contact just burned out. After that, look at the tracks on the board and ring the circuit with a multimeter.

In addition, the cause of the malfunction may be the starting capacitor, which is burned out. In this case, repairing the hood with your own hands is quite simple - you just need to replace the capacitor yourself.

Backlight repair instructions are provided in the video:

In apartment buildings, especially on the last floors, homeowners are faced with such a problem when the hood does not blow out, but blows in, that is, it works in the opposite direction. What to do in this case? The nuisance is that the air blows from the ventilation hole not only in the kitchen, but also from the toilet and bathroom. There are reviews on thematic forums that the easiest way is to take and drown out natural ventilation, but such repairs do not need to be done.In order to repair the central ventilation yourself, which does not suck in, but blows, it is necessary to create forced air intake by installing electric exhaust fans, like Vents. Their cost is relatively low, but the malfunction will be overcome.

So we have provided a list of possible malfunctions of the hood. We hope you have found the answer to your question and now you know how to repair a cooker hood in the kitchen with your own hands!

Related materials:

Repairing kitchen hoods is almost always justified from a financial point of view; every home craftsman can easily fix several minor faults with his own hands.

Before you start repairing the hood with your own hands, you should understand its device. Such a technique can be of the exhaust (exhaust) or recirculation type (air is cleaned and released back), but in both types the main working element is always an asynchronous motor (8).

In addition, in this technique, there will necessarily be a fan (2), which may be axial or tangential. The axial blade is a blade that "draws" the air inward. The air flow will flow along the axis of rotation of the engine. Fans of tangential type are blades-blades evenly spaced around a circle. Such a fan is preferable - its principle of operation provides increased efficiency.

There will definitely be filters in the hood. For example, a budget carbon filter (9) is put on a round motor inlet window, and a more expensive filtering structure with carbon granules will be one that has a rectangular shape and is installed immediately behind the fat filter. The grease filter, in turn, is located just behind the work surface (12). There are also fabric filters and impregnated paper products (disposable), but now the most common are reusable mesh metal grease traps.

As for the control panel, it can be of the touch or mechanical type, but it will always be a common unit, as shown in the photo below.

If the device provides for a change in speeds, then a circuit that generates a control voltage is mandatory. The design is also complemented by lighting. These can be incandescent, halogen or LED bulbs.

It is not difficult to repair the hood with your own hands if you follow a certain algorithm. It is clear that first you need to decide on the problem.

In the event that the hood breaks down and does not turn on, it is imperative to check the functionality of the built-in lighting. Thus, the integrity of the power circuit is monitored, the correct connection to the outlet. If the bulbs work, then the problem lies in the engine or control system, in which case you need to buy new parts that fit your hood model and are approved by the manufacturer.

Spare parts for cooker hoods are sold in specialized stores of spare parts for household appliances and in online stores.

Disconnect the power supply to the hood.
Remove the filters by pulling on the tab. Unscrew the lower panel of the cooker hood while supporting it from below so that it does not fall.
Disconnect the backlight wire connectors so you disconnect both panels from each other.
Remove or remove the hood from the cabinet by unscrewing the screws and place it neatly on the floor. Attention, the hood is heavy, so it is advisable to remove it with a partner.
Remove the fan from the motor by releasing the spring clip or other fastener.

Now you need to remove the engine. To do this, disconnect the green ground wire from the screw on the hood housing, and then cut the wires connected to the motor. Remove the 3 screws from the mounting plate as shown in the photo below, remove this plate and pull the fan motor out of the hood.
Connect the new motor to the mounting plate, then place it in the hood body, ground wire back.

Reinstall the fan blades by securing the spring clip. Install or insert the hood in its place, fasten back all the panels of the case and, having connected the power supply, check the operation of the new motor.

If the motor runs all the time, but does not change speed, then in 92% of cases the problem lies in the control panel. It is better and easier in this case to just buy a new one and replace it, it is quite difficult to repair the board with your own hands.

Now let's consider possible minor malfunctions of the hood.

There are several possible malfunctions here:

The device may not be connected to the electrical network. It is necessary to check both the fact of connection and the presence of voltage in the outlet.
The performance of the circuit breaker is checked by a tester. If this element does not "ring out", it must be replaced.
It may turn out that there is a problem with the power supply. They can occur due to a breakdown of the machine or the failure of fuses.
The power plug may also be damaged. By the way, the plug may contain a built-in fuse, which may blow out - in this case, it will need to be replaced.
Internal wiring of the device can also provoke malfunctions. It must be checked with a tester, and found bad contacts are eliminated by tightening the screws or crimping the tips with pliers.
But electric motor malfunctions require major repairs and professional intervention.

If, when the hood is working, there are still extraneous odors in the kitchen, then most likely the matter is in the filter. The efficiency of the hood decreases if it is not replaced (cleaned) in time. For example, the charcoal filter located just behind the intake grille must be replaced approximately every 3 months. A filter of this type can be collapsible, then only coal granules are changed in it (photo on the left).

Disposable grease filters (paper and fabric) must also be replaced. They cannot be restored and cannot be erased. But the metal mesh structures need regular cleaning (they can even be washed in the dishwasher - about once a month).

If you are convinced that the problem is not in the filter, then you can solve the problem as follows - increase the operating time of the device, turning it on a few minutes before turning on the burners and turning it off a quarter of an hour after the stove is free.

If the illumination of the hood does not work, then everything can be repaired with your own hands according to the following algorithm:

In the case when the fan rotates without interruption, but the lighting does not turn on in any way, the light bulb is simply replaced with a new one.
When replacing the light bulb did not help solve the problem, it is worth checking the operation of the light switch, most likely the wire just came off in it.

In order for your hood to work for as long as possible, you should change and clean filters in it in time. Modern models are equipped with special sensors (buzzer or light) that indicate the need for replacement;
To exclude overheating (breakdown) of the engine, it is necessary to prevent the operation of the device when the gas burners are working without dishes;
In addition, the minimum mounting height of the working surface of the hood must be maintained - 70-75 cm above the gas stove, and 65-70 above the hob.

Read also:

A little about the repair of the exhaust fan motor. And the main question is how and how to lubricate the engine: the shaft and bushings, so as not to disassemble the fan every month.

Today we will repair the fan from the hood. The fan, ordinary, household, in principle, the company does not play a role, they are all the same type. It hung in our bathroom, worked for quite a long time, but the high humidity, dirt from the ventilation did their job.

Now, when working, an extraneous sound is heard, either a squeak, or a crackle.The reason is the fastest - dirt on the bushings, or some other reason, now we will analyze it together and repair the engine.

We will lubricate the engine bushings with Ate universal grease. At the end of the video, there is a small video showing how the hood motor works, treated with such a lubricant a couple of months ago.

Channel link:
Playlist link:

What is called STOCK here is nothing more than a SHAFT! Felt pads are located close to the ball-shaped bushing (you can see it in the video). For what? - for impregnation with two drops of LIQUID oil! No tubes! at the end of the assembly, I recommend lightly hitting the shafts from the side to self-center them!

it is necessary to saturate the “felt” with grease around the self-lubricating bush-bearing.

It costs a penny, you can also a new one

Great video! The question is, is it possible to keep such an engine on with bare hands? Right behind the iron hull?

From a security point of view, it is impossible. But the chances of a damaged winding piercing the case are small.

Such fans hum not only because of the lubricant, but also the felt washer wears out, damping the axial runout - this creates the main noise. Install new washers to prevent the shaft from jumping up and down and soak them with oil. ‘Do it right’

I applaud while standing! The only adequate comment. Everything on the video is for a couple of weeks. And lubrication from wear, oxidation and sticking of brake pads is generally out of place here. It will gobble up the bushings completely to the end.

And what have you lubricated several times before that the engine almost jammed? Is it this tube?

I didn’t make an ombudsman. I disassembled the engine several times, only I used this lubricant the last two times, the previous one and for shooting. The engine growled a week ago, now I will do the preventive maintenance again. The engine was running out for over a year.

Vladimir Rustemov, that's just it, that the author praised his magic tube and at the same time let slip that this is not the first time he has been disassembling this engine. And judging by the way he growls, doubts arise about the quality of this lubricant. I lubricate such motors with the 158th grease.

Video (click to play).

Ignat Zybin Take Vaseline at the pharmacy, or whether they can even be mixed and lubricated, you can also add a little salidol to the Vaseline or grease with pure Vaseline Cho the author of the video powders the brains of nothing really did not tell everything around

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