Failure of the stove motor on a classic is one of the common problems of the heating and ventilation system. But, more often than not, car enthusiasts are faced with the fact that the fan motor starts to whistle, squeak, and there is a hum and other strange sounds.
In these cases, it is possible to restore normal operation of the motor for a while. To do this, you should disassemble the engine, wash it from dirt, dust and lubricate the bushings and other rubbing parts with graphite lubricant. Litol-24 lubricant is suitable for bearings.
Note: the heater motor on bearings is more reliable and less noisy compared to a motor on bushings.
You should also make sure that the impeller does not touch the housing (casing). If necessary, sharpen the blades slightly.
Stove motor with impeller VAZ 2101-2107, Oka, Niva
How the stove 2107 works
So, the heating system of the VAZ 2107 includes:
- heater;
- fan;
- heater control unit;
From the outside, air enters through the air intake into the casing of the air intake chamber. The camera is located in the engine compartment (in the area under the windshield). The air is then redirected to the heater, where moisture condensation occurs.
An important element is the heater radiator on the VAZ 2107, which heats up due to the circulation of coolant (coolant) in the engine cooling system. In this case, the air temperature changes due to the opening and closing of a special tap (VAZ heater tap), which reduces or increases the flow of heated coolant entering the heater radiator.
You can control the crane thanks to the presence of a regulator in the cabin, which is connected to the crane using a flexible rod. The air flow into the cabin is supplied by the heater fan, and the intensity of the supply will depend on the rotation speed. The VAZ 2107 heater motor is responsible for the operation of the fan. The fan rotation speed changes due to the use of a resistor.
By the way, if the car is moving at high speed, the heating system can supply air to the cabin even when the VAZ 2107 heater fan is turned off. The fact is that the air flow from outside is capable of creating pressure in the air supply box, due to which heated air penetrates into the cabin.
The heating system itself is simple. Air ducts can direct heated air to the feet, the driver, the windshield and side windows, etc. You can control the stove, change the temperature, and select the blowing direction using the knobs on the dashboard.
The handle at the top is responsible for adjusting the position of the heater tap. By moving the handle as far as possible to the left, the tap closes completely, and to the right will mean full opening.
The middle handle changes the position of the air supply cover, which allows you to adjust the intensity of the hot air supply. The handle on the bottom allows you to control the dampers of the heated glass air ducts. If you move the handle to the right, the air flow goes to the side windows, while the left position allows you to blow the windshield.
Possible stove repair
What can be repaired in a stove radiator? Unfortunately, not in all cases it can be revived, but sometimes self-repair really helps.
- An old-style copper radiator can be soldered if it leaks. This will be faster than looking for a new radiator of the same type. With aluminum everything is much more complicated; welding will be required, but it can still serve if it gets to a good craftsman. However, only metal parts of the radiator have a chance of successful repair; plastic cannot be restored.
- You can wash the inside of the stove yourself. To do this you will need a Karcher, which can supply water under pressure. Water is poured into the radiator until clean water comes out.
- You can also clean the inside of the radiator using citric acid or caustic soda: dissolve it in water and pour it into the radiator for an hour. If the solution is poured out dirty, repeat washing until all contaminants are gone.
Below, in the video, there is an example of how you can clean a stove radiator using citric acid at home.
VAZ 2107 heater fan does not work
Hello. This time I will write about possible reasons why the heater motor on a VAZ 2107 may not work. These reasons can also be attributed to other classic models such as VAZ 2105, 2106, 2101, 2103, 2104.
To check all possible malfunctions, you need to have at least a test lamp, or better yet, a multimeter.
If you find out that it is the heater motor that has broken down, then read the article.
To understand what can break and why the VAZ 2107 heater fan may not spin, you need to consider the electrical circuit for powering this motor.
How much does a new heater motor cost?
Motors are usually sold assembled with or without an impeller. In the Moscow region (Moscow city and region), the price for a new heater motor on a bearing with an impeller for VAZ 2101-07, OKA, VAZ 2121 NIVA cars is about 500-600 rubles. Without an impeller - 100 rubles cheaper.
Characteristics of the stove fan electric motor:
- Nominal voltage 12 V
- Rated power 20 W
- Maximum current 5.0 A
- Rated speed 3000 min -1
- Weight 0.85 kg.
Used on the following cars: VAZ 2101. 2107, 2121 Niva, 1111 Oka.
A few more tips:
It is advisable to check the operation of the motor directly in the store. Be sure to keep your receipt after purchase.
There were even funny cases of selling defective products, when the stove motor turned in the opposite direction, and people complained about poor fan operation, and all the wires (ground and other terminals) were connected correctly.
The problem was that the assemblers at the factory had mixed up the wires by soldering them to other brushes. Therefore, nowadays you shouldn’t be surprised by anything, not even by a stove motor with a fan that blows in the other direction!
It is quite simple to understand that the heater fan on a VAZ 2107 does not work: you need to start the car and turn the switch responsible for the operation of the cabin heater. If the characteristic sounds from the fan operation do not appear, it means that the spare part needs to be repaired or replaced. Many owners of this car model face this problem. As a rule, you can find the cause of the breakdown and fix it yourself. It happens that the heater fan on a VAZ 2110 does not work only at some speeds. In this case, it is worth checking the functionality of the additional resistor or heating intensity toggle switch.
Reasons for fan failure
If the stove fan does not work on a VAZ 2107, you will have to check six elements that could have failed. Most often, this part stops functioning due to a blown fuse. This type of malfunction is considered the simplest, but it is quite problematic to fix. The fact is that replacing a blown fuse is not difficult: even a novice car enthusiast can cope with this task. However, the failure of the fuse is often caused by a short circuit, which is difficult to detect, because you will have to check the entire electrical circuit responsible for the operation of the car's interior heater. On the VAZ 2107, the fuse marked F7 is responsible for the operation of the stove. This element has a power of thirty amperes. If this fuse fails, you will notice that the glove compartment light and the cigarette lighter have stopped working along with the stove.
Connection diagram for heater fan VAZ 2107
The diagram shows how the stove fan (4) is powered. Power from the battery, through the mounting block (1), goes to the ignition switch (5) and again goes to the mounting block (1). In the mounting block (1) it passes through fuse F1 (10 amperes) and goes to the stove speed switch button (2). Next, power from the button goes either through the resistance (3) to the motor (4), or directly to the stove motor (4).
The VAZ stove fan will not work if any of its circuit components is faulty. You can determine the reason why the VAZ 2107 heater fan does not work:
- There is a fault in the mounting block.
- The contacts of the heater fan speed switch are burnt out.
- The speed control resistance has burned out.
- There is a malfunction in the heater motor itself.
Let's take a closer look at each of the faults.
Cost of windshield defroster repair at service
The problem is that service centers often approach this problem rather dryly, starting work with disassembly. Sometimes it is enough to diagnose the operation of the climate control unit in order to perform a restoration and put the car in perfect order. But in reality, the craftsmen begin to remove the front plastic panel and look for causes in non-existent problems.
- increased recovery time; sometimes the problem can be found and fixed for several days, which deprives you of the opportunity to operate the car properly;
- increased costs due to replacement of parts that did not actually need to be replaced, as well as labor charges for these processes performed unnecessarily;
- inept diagnostics can also lead to breakdowns of some important elements, which will then have to be repaired; this will also become a big drawback of the service;
- Diagnostic work can cover all climate systems in a car, so a variety of problems will be found, and this again increases the cost of contacting the company.
Malfunction in the VAZ 2107 mounting block
If the stove stops blowing air, then first of all look to see if fuse F1 in the mounting block is intact. Usually, if this fuse blows, then the heated rear window and reverse lights stop working along with the heater. This fuse must be rated 10 amps. No more and no less. If you install a fuse of less than the nominal value, it will constantly burn out, and if you install a fuse of a higher nominal value, it is possible to burn the mounting block. If you have a fuse of a higher rating (as in the photo below), then the likelihood increases that the mounting block has failed and the plus is not supplied to the speed shift button. How to find out, read the next paragraph.
How to identify the problem and fix it
There are several reasons why the furnace blows cold air or does not work at all. In this case, you must proceed as follows:
- Check the faucet to see if it opens.
- Is the cold air damper capable of closing?
- With the car running, check the heater (heater radiator) for heating.
Radiator replacement
If the problem is in the radiator and it needs to be replaced, then proceed as follows:
- Drain the liquid.
- We unscrew the two clamps from the engine compartment, which are located on the radiator pipes. We remove the hoses.
- Unscrew and remove the fasteners on the rubber seal.
- We dismantle the radio panel and the cable fasteners on the heater valve drive. To do this job you will need a 7 key.
- Next, use a screwdriver to remove 4 spring clips from the fan casing. The casing drops down and slides to the left, after which the radiator can be pulled out.
- Now you can carefully examine the radiator, revive it or replace it with a new one. Assembly is carried out in the reverse order and does not involve any difficulties.
A broken radiator is a common cause of a non-functioning stove.
Restoring glass blowing
The stove that is installed on the VAZ-2107 has some design features, due to which the left pipe often does not blow the glass well enough. To put up with such an inconvenience in winter is difficult. Therefore, it is worth working to eliminate this problem. You must proceed according to the following scheme:
- We remove the deflector from the pipe by prying one of its sides with a screwdriver.
- The deflector body is held on the torpedo using small antennae. We put our hand inside and pull it out.
- The 50mm fan from the computer must be placed in the center of the dismantled case and marked in the appropriate places.
- In the plastic case, using a utility knife, hacksaw or sharp knife, cuts are made at the marks.
- The plastic easily breaks off along the line of cuts and an opening is obtained into which the fan is installed. It should fit snugly in place.
- We return the insides of the deflector to their place. The internal blades will not be able to rotate at full speed due to the changes made.
Other minor faults
Finding and fixing minor problems on your own is a handy skill for any car enthusiast.
After such actions it will be easy to determine the causes of the breakdown. And they can be as follows:
If the faucet is working properly, but the heater heats up only at high engine speeds and under such conditions begins to blow warm air, then the fault should be looked for in the pump or a coolant leak. To find a leak, you must carefully examine the required area of the cabin. If leaks are found, it is necessary to replace the hoses, tighten or install new clamps
Do not neglect the cap on the expansion tank. Tightness is the main condition under which the heater can function normally. Leaks can also occur due to rusting of the radiator, taps and other elements of the heating system
In this case, it is enough to simply replace the necessary part and enjoy a comfortable ride. The tightness can be checked in another simple way. Turn on the engine and wait 10 minutes. During this time, the expansion tank should warm up. If this does not happen, then we can talk about the lack of pressure that is necessary to supply antifreeze or antifreeze to the heater stove. If you notice that the car gets very hot when standing in a traffic jam, then you can talk about the lack of necessary pressure.
The stove can become clogged with various debris and become coated from the inside with oxides of various substances. In this case, it is necessary to clean out the debris and clean the system.
The car owner must be prepared for minor problems and be able to quickly fix them. For example, with the onset of winter, many VAZ-2107 owners’ stoves do not heat up and it is not always convenient to run to specialists with this problem.
Contacts of the heater fan speed switch are burnt out
You checked the fuse and saw that it was intact. Let's dig further. Now we take and remove the gear shift button from the panel and disconnect the wires from it. Afterwards, we reliably connect one end of the indicator light to ground, and alternately insert the other end into the removed terminals of the wires disconnected from the button. The ignition must be on!
If the light does not light up, then power is not supplied to the speed switch and the mounting block is most likely faulty.
If the light comes on when testing one of the contacts, it means either the button or something else is faulty. How to find out? Very simple! To do this, we make a jumper from a regular wire, from the contact, during the test of which the indicator light came on, to one of the other two contacts. The stove motor will work if the button is faulty. If the motor does not work, then it is the motor that is faulty.
Let's sum it up
There is a whole bunch of problems that can lead to unclear operation of the windshield and other windows in the car. But fogging and other unpleasant situations are not always associated precisely with this moment. Most likely, you will have to carry out complex diagnostics, including the presence of leaks in the car through which moisture enters the interior and condensation forms. It should be noted that the quality of work of most foreign cars in this aspect is much better than domestic cars. Their blowing systems are more thoughtful and of higher quality in all respects. If it is a foreign car that breaks down, you will have to work hard to solve the problem.
Often the problem is solved simply by a high-quality overview of all the important points in the car. You can solve problems by replacing some parts, additional diagnostic work and identifying problems in the car. But most often you will have to go to a service center and check the operation of the main components of the blowing system. This is the only way to eliminate real problems and purchase high-quality options for all devices in the cabin. This will help get rid of glass fogging and other troubles in the cabin. The cost of such repairs at the service may be too high. Have you ever had problems with airflow?
Malfunction in the heater motor itself
Before disassembling the panel and stirring up the interior, check whether the mass going from the heater motor to the body sits well. It often happens that this wire simply rots.
If you have a multimeter, you can ring it. To do this, take out the speed switch button and disconnect the contacts from it. Now, in the continuity mode, connect one probe of the multimeter to ground, and check the wires with the others one by one. If the motor and ballast resistance are working properly, the multimeter will beep when checking two of the three wires. If the ballast resistance is faulty, then the multimeter will beep when checking one of the three wires, and if the heater motor does not work or does not have contact with ground, then the multimeter will be silent.
Guest_Driver053_* Feb 03 2005
People, help me with some practical advice. This is the situation: there is almost no air flow through the left air duct. I’ve already disassembled the stove twice, climbed into it with all sorts of wires - I thought it was clogged - no shit, everything flies through, and no air will go in there, even if you crack it. By the time I drive 500-700 meters from the house in the morning (I warm up the car while I clear the snow, then immediately drive), the glass has time to freeze. You have to use a scraper from the inside at a traffic light. It's funny to me!
On the right everything is great.
If it’s important: I didn’t remove the air duct (it’s sandwiched between the steering shaft and the body, the nuts are painted over, but for some reason I didn’t dare to unscrew them), but poked at it like this.
Friends advise putting a cooler from a processor or system unit in there. But why fence a garden? Maybe someone had this? How were you treated?
Frequent malfunctions of the VAZ 2107 stove
mashinaa.ru
The most typical malfunctions of the VAZ 2107 stove include:
- Air entering the cooling system. This usually happens after the system has been filled with antifreeze. Removing the airlock normalizes the heating process of the interior.
- When the heater tap is open, coolant does not flow into the radiator. This most often occurs when water is used as antifreeze. Scale forms in the system, clogging the faucet and impeding the passage of coolant. The problem is eliminated by dismantling the tap and then cleaning or replacing it.
- Poorly functioning or failed water pump. If the pump does not pump coolant, this can lead not only to a lack of heating of the interior, but also to more serious problems, such as engine overheating. The water pump does not work, as a rule, when the generator belt breaks, as well as when it jams as a result of wear on the bearings.
- Clogged stove radiator honeycomb. In this case, the supply pipe will be warm and the outgoing pipe will be cold. The radiator often becomes clogged when water is used as a coolant, as well as when oil or additive particles enter the system to eliminate leaks. Cleaning or replacing the radiator will help restore normal operation of the stove.
- Displacement of the partition according to the website mashinaa.ru in the radiator. If both radiator hoses are hot, but warm air does not enter the cabin, then most likely the partition in the radiator has shifted. The only solution to the problem is to replace the radiator with a new one.
If an oily residue appears on the floor or glass, you should look for an antifreeze leak, which may be:
- on tap;
- on pipes;
- on the radiator.
If a faucet or pipe is leaking, it should be replaced. A leaking radiator can be temporarily sealed, but it will still need to be replaced soon.
The list of possible stove malfunctions is not limited to this.
It can be quite difficult to get to some elements of the VAZ 2107 heating system
Solving the problem
First of all, you need to check the heater valve. It opens and closes with a special cable. If its tension has weakened for some reason, then when you turn the lever, the faucet either does not open at all or moves literally a few millimeters. It will need to be tightened.
It is easy to check the performance of the radiator itself by warming up the power unit while the fan is not working. All you need to do is gently touch the antifreeze supply and discharge pipes with your hand.
Getting to them is easy - you just need to open the hood.
Often, over the summer, the heater valve manages to sour, as they say. Therefore, when an attempt is made to open it, the damper simply breaks off and the drive roller remains in place. Such an element will have to be completely replaced with a working one.
If the cooling fluid level is very low, this will cause the radiator to remain relatively cold. Here you will need to look for a leak and replenish the coolant volume.
If the thermostat breaks down, it needs to be replaced with a new one, and the air lock is removed by pumping antifreeze through the system.
A failure of any main element of the heating system should be suspected only when warm air stops flowing into the cabin altogether. If its supply is limited only in several directions, then most likely we are talking about local breakdowns.
The stove doesn't work in summer
Sometimes during the warm season it is impossible to turn off the stove by setting the upper handle of the control unit to the extreme left position. If you cannot turn off the tap, the tap itself or its drive cable is faulty. The tap can be found under the instrument panel on the passenger side. If you also cannot close it manually, you should not apply much effort. The faucet may break and antifreeze may leak into the cabin.
You can replace the faucet after purchasing a new one at any car service center. However, you can try to do this yourself. It should be noted that changing the faucet with your own hands is quite inconvenient due to its location. First, open the hood and disconnect the pipe going to the tap. Since coolant will flow from the pipe, it is necessary to place a previously prepared container under it. After this, you need to remove the storage shelf and, using a 10mm wrench, unscrew the two nuts securing the faucet to the heater body from the passenger seat. Then the tap is removed from the studs, removed and replaced with a new tap in the reverse order.
The reason for the inability to turn off the heater is usually a faulty heater valve.
What is a heater
The main element of the system is the heater, or as it is also called, the “stove”. Its design includes:
- plastic case with air supply cover;
- heater radiator with tap;
- electric fan.
In fact, the heater is a real “stove”. The upper part of its body is equipped with an adjustable air intake cover. Through it, outside air enters the “stove”. Inside the housing there is a heater radiator through which heated coolant (antifreeze or antifreeze) moves.
By itself, heated air cannot enter the cabin with the necessary pressure, even during fast driving. A fan with an electric drive (motor) is used to pump it. It is also located inside the heater housing. The “seven” fan can operate in three different power modes.
Injector and carburetor: is there a difference in the design of the heating system
The heating system of the VAZ-2107 (injector) is no different from the one that was equipped with the old carburetor “sevens”. Their designs and operating principles are absolutely identical. Radiators, their taps, electric fans and all other elements are interchangeable. The only way the heating system of the VAZ-2107 (carburetor) may differ is the material used to make the “stove” radiator. The old "sevens" had them made of copper.
