Probably, many have noticed that the temperature at which the fan turns on on engines is latest generation VAZ 2110 -2112 (100-105 C) is too high to the normal operating temperature of the engine (85-90 C).

First of all, this introduction is related to the manufacturer’s struggle for cleaner exhaust from the pipe of your car (requirements modern standards Euro 3 and above). At a given temperature, more than complete combustion fuel and its components.

But it should be noted that, as always, this positive side for one aspect brings something negative for another. So, with a slight, but still overheating of the engine and head, irreversible physicochemical processes occur in the metal, which ultimately affects the overall final operation of the engine hours power unit. Apart from the fact that in the event of a failure of the electrical components that affect the fan’s activation, the time to notice this at an elevated standard switching temperature of 105 C to overheating of 125 C will be significantly less than from normal operating temperature to overheating.

For more uniform and controlled operation of the engine, it is proposed to do parallel circuit turning on the fan. A positive contact is always connected to one of the fan contacts, and for the second negative contact it is suggested to connect through a parallel wire with a switch according to Fig. 1.

Figure 1 Electrical circuit diagram for connecting the radiator fan VAZ 2110 2111 2112

Figure 2 Wire connection location in engine compartment to turn on the radiator fan VAZ 21102

Figure 3 Alternative location for installing the radiator fan switch VAZ 2110 2111 2112

After implementing this solution, all that remains is to mention additional features control operating temperature power unit with all the subsequent positive arguments given above.

PS Due to existing conservative views, many may think that in electrical diagram A relay is required to turn on the cooling fan. I am against unnecessary things and can say that in order for the circuit to work, just a powerful switch rated for a current of at least 20 A for 12 Volts, that is, 240 Watts (such switches are commercially available - for example, 220 Volt 16 A, as in Figure 3, that is, at 3520 watts) This scheme has been successfully working on a VAZ 21102, produced in 2001, for 3 years. It should also be additionally noted that this method is not a replacement for the standard circuit for triggering the radiator fan in a car and is intended only as an alternative solution for operating the engine at higher speeds. low temperatures controlled directly by the driver.

In any case, if the engine overheats, even if you have implemented the principle described above, still check the cooling system and ensure that it is in full working order.

Emergency actions if the engine cooling system overheats while driving.

At the first signs of overheating, if the temperature gauge needle has gone into the red zone, but no clouds of steam are escaping from under the hood, turn on maximum mode interior heating. This is necessary in order to reduce the temperature of the coolant in the engine cooling system.

Turn on alarm, depress the clutch pedal and, using the inertia of the car, try to carefully move to the edge of the roadway and stop as far to the right as possible at the curb, and if possible, then outside the roadway. Let the engine run for a couple of minutes at normal speed. idle move with on full power heater, do not turn off the engine immediately. Open the hood and inspect the engine compartment.

After stopping the overheated engine, local overheating of the coolant begins at the points of contact with the most heat-stressed engine parts and the formation of increased local overheating. In addition, it is better to start the car for 10 seconds after 2-3 minutes so that the new volume of coolant begins to contact the engine parts.

Determine where the steam is coming from, if any. When inspecting the engine, pay attention to the presence of coolant in expansion tank(be careful not to get burned), on the integrity of rubber hoses, radiator, thermostat.

Look under the instrument panel from the side front passenger in the cabin and find out if there is a leak underneath or traces of coolant flowing from the heater core.

If coolant leaks are detected, the burst hose can be temporarily repaired using duct tape or adhesive tape from your first aid kit.

A leak in a radiator, thermostat or heater is quite difficult to eliminate on site, so in such a situation it is necessary to add water to the cooling system and carefully monitor the temperature gauge while driving, periodically restoring the level in the cooling system.

The engine may overheat if the thermostat fails, which regulates the flow of fluid in the cooling system through or in addition to the radiator (to speed up the warm-up of a cold engine). To check the thermostat, on a warm engine, check by touch the temperature of the hose connecting the thermostat housing to the radiator. If the hose is cold, the thermostat is faulty and there is no circulation through the radiator.

Very often, the cause of overheating of an engine whose cooling system is equipped with an electric fan is the failure of the fan. Start the engine, monitor the temperature and see if the cooling fan turns on when the engine overheats.

If the fan does not turn on, the fuse may be blown, the start relay is faulty, the motor is burnt out, or the wiring is faulty.

Check the integrity of the electrical wiring and the reliability of the connections of the electrical connectors.

If the wiring is OK, check the fuse and replace it if faulty.

If the fuse is good, try replacing the fan relay.

If the fan still does not turn on, check the motor. To do this, take two additional wires and supply power to it directly from battery. Wires must be securely fastened and insulated.

If the electric motor starts to work, the electrical wiring is faulty; if not, the wiring or the electric motor itself is also faulty. The relay and electric motor are beyond repair; replace them as an assembly.

When actively using laptops, especially in the hot season, users often encounter strong heating. Systematic overheating leads not only to slowdown of the OS and periodic self-shutdown of the PC, but also to premature failure of the processor, motherboard or other structural elements. To reduce the temperature of the laptop, you can forcefully turn on the fan included in the laptop cooling system by software changing some of its settings.

Ways to control the operation of the cooler on a laptop

In laptop computers, the BIOS is responsible for the normal functioning of the cooling system. At the same time, the factory settings provide for the fan to operate at only 50% of its capacity. maximum power . This is done so that during operation the cooler does not buzz too much and does not consume a lot of electricity.

Almost all motherboards provide the ability to programmatically control the performance of the cooling system. There are several ways to force the fan on your laptop:

1. Via BIOS.
2. Using special software.

Changing the cooler settings can lead to unpleasant noise during its operation, as well as accelerated battery drain. Therefore, before starting radical measures, you should disassemble the laptop, and then clean the fan and motherboard from dust, because it reduces heat transfer and, accordingly, leads to an increase in the temperature of the PC.

Forced fan start via BIOS

To make your laptop cooler work more efficiently, you can change its speed and set the CPU temperature it needs to maintain. To do this you need to do the following:

The software shell of the Hardware Monitor tab different assemblies BIOS may vary. However, if you know what parameters need to be changed, you can easily switch the fan to the required operating mode:

In intelligent mode, the cooler can operate with the following parameters:

• Silent – ​​the emphasis is on silent operation of the system and saving battery power;
• Standard – the fan will operate at half its capacity;
• Performance and Turbo – the fan is overclocked to its maximum (in this case, the battery life of the laptop will be slightly reduced, since the cooler will consume a lot of energy).

Forced fan activation using the SpeedFan program

Another way to improve the performance of the cooler is to use a special software, which includes the free SpeedFan utility. To overclock the fan using this application, you must:

There are other programs that allow you to force the laptop fan to start. Thus, using the AMD OverDrive utility, you can make changes to the operation of a PC cooler built on an AMD processor. The Riva Tunes application has been developed for Intel processors.

The performance of the engine when driving in hot weather, under load and, especially, in traffic jams depends on the VAZ 2114 radiator cooling fan. Sometimes the fan thermostat does not work and the motor overheats.

It is difficult to repair such a breakdown on site, so it is better to install a forced fan button in advance, with which you can turn on radiator cooling if necessary to prevent engine overheating.

What is needed to install the VAZ 2114 fan switch button

Before making a button for a VAZ 2114 fan, you need to prepare the following components:

• four-pin relay;
• button mounted in the dashboard;
• connecting contact blocks for relays and power buttons;
• 5 meters of wire with a cross section of 0.75 mm2.

Button connection diagram

To be able to turn on the fan manually, the VAZ 2114 fan button is installed in on-board network parallel to the thermal relay, which is activated when the coolant temperature rises. There are two options for connecting the button: directly or using an electromagnetic relay.

In the first case, the buttons will break too much through the contacts high current and will quickly fail. That's why correct connection fan control must be done only through a relay. In this case, only a small current will pass through the button, controlling the relay electromagnet.
A pair of wires is connected to the terminals of the relay contacts (those that are open when there is no power to the electromagnet): one from the output of the thermal relay, the other from the input. In this case, when voltage is applied to the relay electromagnet, the radiator fan will turn on. The “ground” of the relay can be connected to the nearest bolt, and the “plus” can be connected from the fuse block. Moreover, it is better to connect it to the output of the fuse, which is de-energized when the ignition is off. For example, to fuse F10. In this case, even if you forget to turn off the fan, it will stop working after turning off the ignition. Otherwise, there is a risk of draining the battery to zero by leaving the car in the parking lot with the fan on.

Installing a forced fan button for VAZ 2114

You should start work by disconnecting the ground terminal from the battery so that a short circuit does not occur during the connection of the electrical circuit.
The procedure for installing the button is as follows:

1. Prepare a block to which the button for forced activation of the VAZ 2114 fan will be connected. To do this, you need to leave 4 terminals with wires on it: two central ones for illuminating the button and two corner ones for controlling the power circuit of the electromagnetic relay.
2. Connect two wires with lugs to the electric fan power wires that go to relay K1 (pins 30 and 87). To do this, you need to strip off some of the insulation on the wires approaching the relay and screw the pieces of wire that will go to the relay to them. Ideally, it is better to solder the connection, but you can get by with just a tight twist. The connection points must be carefully insulated.
3. Connect the tips of the connected wires to the relay block to pins 30 and 87.
4. Connect the control wire from the button block to terminal 85 of the relay, and connect terminal 86 with a wire to the vehicle ground.
   Install the fan switch button into the free slot on dashboard, after removing the plug.
5. Install the relay in a convenient place, for example, under the dashboard of a car, and secure it.
6. Connect ground to the battery.
7. Turn on the ignition and press the fan button. The relay should click and the fan motor should turn on.

This completes the installation of the forced fan button on the VAZ 2114.

The VAZ 2107 is equipped with an electric radiator cooling fan. It automatically turns on when the coolant heats up to 90 degrees and under normal conditions ensures a stable engine temperature regardless of air temperature and driving mode.

But there is one problem. Sometimes the fan switching relay (sensor) breaks and radiator fan VAZ 2107 won't start. As a result, the engine overheats and the matter is best case scenario, is limited by boiling and leakage of coolant, and in the worst case - major repairs engine. To avoid problems, you can improve the design by organizing forced cooling of the radiator. There are two ways to do this: mechanical and electrical.

Mechanical forced cooling of the VAZ 2107 radiator

On older VAZ models, the radiator was cooled using an impeller mounted on the water pump rotor. This solution ensured constant airflow to the radiator when the engine was running. Considering that the design of the VAZ 2107 differs little from its “predecessors”, installing such an impeller will not be difficult.

The advantage of this solution is reliability. Forced mechanical airflow of the radiator ensures that the car does not boil while sitting in a traffic jam on a hot day. But at the same time, the efficiency of blowing at low speeds is reduced in comparison with electric blowing. In winter, another disadvantage of forced cooling appears - cold engine It is additionally blown by a fan, which slightly slows down its heating. The fact that the fan blows on the radiator on a cold engine does not in any way affect the warm-up speed provided the thermostat is working. The fact is that before the engine warms up, the coolant circulates through a small circuit, bypassing the radiator.

The mechanical drive of the VAZ 2107 cooling fan can be improved:

• Install a diffuser that directs the air flow through the radiator honeycombs. This will improve cooling efficiency.
• Move the radiator a little back, closer to the impeller. To do this, you can tilt its upper part, using rigid steel strips for fastening. The slats must be calculated so that the distance between the radiator and the impeller is approximately 2040 mm.

This way you can protect your car from overheating.

Electric radiator cooling fan (forced)

To prevent a breakdown of the VAZ 2107 fan sensor from causing problems, you can organize forced cooling without replacing the standard electric fan with an impeller mounted on the pump pulley. To do this, it is enough to ensure that the fan is turned on with a button. You will need the following parts and materials:

You will also need a new fan sensor if the old one is faulty. Serviceability can be checked with an ohmmeter or continuity tester. If the fan does not turn on when the lower part of the radiator heats up, it must be replaced.

First you need to reduce the current passing through the contacts of the thermal relay that controls the fan. To do this, the VAZ 2107 fan switching circuit must be changed so that it is powered not directly from the sensor, but through an additional relay. In this case, the contacts of the fan sensor (thermal relay) will not burn, and in case of failure additional relay, the latter will be much easier to replace.

It is also necessary to connect the fan switch button so that when turned on, it duplicates the sensor, supplying voltage to the relay coil when turned on. In this case, if the sensor breaks down, you can manually turn on the VAZ cooling fan and protect the engine from overheating.

Improving the cooling system with an electric fan

To improve cooling, you can replace standard fan cooling the VAZ 2107 to a more powerful and advanced one. Fans from Viburnum or Priora are suitable for this purpose. The eight-blade fan is especially effective, providing particularly strong air flow.

It is worth considering that the cooling system of the VAZ 2107 was originally designed for efficient work. If she fails, the reason lies not in ineffectiveness. standard battery, but clogged radiator cells or lack of coolant in the system. Therefore, if the engine overheats while the fan is running, it is worth checking the coolant level and cleaning the radiator honeycombs (or replacing it).