In detail: Do-it-yourself repair of the VAZ 2114 stove blows only cold air from a real master for the site my.housecope.com.
A good stove heater is installed in the interior of VAZ front-wheel drive cars - it is quite warm in the Zhiguli in winter. But sometimes various problems arise - the stove blows cold air (VAZ 2110, VAZ 2114, other Samara models).
In summer, car owners practically do not use the stove and remember it only when the first cold weather sets in. If the stove blows cold air on VAZ 2114 (2115) cars, there may be several reasons for this phenomenon:
heater motor does not work
the stove radiator is clogged with dirt;
air has entered the cooling system;
burnt head gasket;
soured and the stove tap does not open;
a cable flew off the faucet, or it broke;
the thermostat is faulty;
insufficient level of antifreeze in the radiator;
low water pump performance.
On cars 2114, it often happens that hot air blows only from the central deflectors, and cold air comes out of the instrument panel on the sides. The cause of such a malfunction is a break in the cables or their jumping off the flaps that direct the air flow to the center or to the side deflectors.
Often, drivers also complain that the stove blows cold air at idle and low engine speeds, while the interior warms up while the car is moving. The reasons may also be different, but in order to solve the problem, you need to start troubleshooting sequentially, checking the status of all nodes.
The reasons for the lack of hot air in the interior of cars of VAZ 2110-2111-2112 models are generally the same as on 2113-2114-2115, but on the "dozens" and "dvenashki" there is also an additional automatic control system for the stove (SAUO), which It can also crash intermittently. The temperature sensor in the 2110 cabin is located on the ceiling, and the damper is on the heater control unit, it is controlled by a micromotor reducer. If the stove blows cold air on VAZ 2110 cars, both the sensor itself and the heater control system may be faulty.
Video (click to play).
Troubleshooting in the heating system of front-wheel drive VAZs should begin with the stove motor:
turn on the ignition, start the engine;
on the heater control unit, we check the operation of the motor in all positions. If you hear how the turntable of the furnace motor changes speed when switching, most likely it is working.
The stove motor may not work for several reasons:
the fuse responsible for the operation of the electric motor has blown;
the contact in the mounting block is oxidized;
the switch itself is faulty;
there are breaks in the wiring;
the furnace motor burned out.
If the motor only runs at maximum speed (third position), the resistor is most likely defective.
When the stove motor burns out, it needs to be replaced. We perform the work on replacing the part as follows (using the example of 2114):
remove the decorative trim on the driver's side in the cabin;
Now it remains to install a new spare part, and fix all the removed parts in their places.
The stove may blow cold air due to a malfunction in the cooling system. If the stove motor is working, we are looking for the reason for supplying cold air to the passenger compartment instead of hot air in the following order:
open the hood, check the coolant level in the expansion tank, if necessary, add antifreeze to the desired level;
warm up the engine, pay attention to the readings of the temperature sensor on the instrument panel.If the temperature does not rise to the desired value, the valve in the thermostat may be faulty - it opens ahead of time;
also, the cooling system can “air up”, often the cause of this phenomenon is a broken head gasket. Cylinder head burnout may be accompanied by the following symptoms:
Antifreeze splashes out of the expansion tank.
The gauge on the instrument panel shows a high temperature.
Engine troit.
Antifreeze gets into the oil, engine oil brightens.
If it breaks through the cylinder head gasket, often cold air blows into the cabin only at low speeds, when gas is added, the cooling system “breaks through”, and hot air begins to flow into the cabin. Very often, replacing the PHBC solves the problem.
Problems with the stove faucet on VAZ 2108-15 cars are quite common - if the faucet is partially or completely closed, it does not allow hot antifreeze to enter the stove radiator. The problem with the heater tap is that it turns sour over time, and the damper in it stops moving. So that the valve in the faucet does not turn sour, it is necessary to turn it at least once a week, moving it to the open and closed position.
You can make sure that the faucet passes warm air by comparing the temperature of the pipes in the engine compartment and the passenger compartment - with the faucet fully open, the pipes should be equally hot. Changing the heater faucet is quite troublesome, therefore, for replacement, you should buy original parts of good quality.
Over time, the heating radiator VAZ 2108-15 may become clogged, on the VAZ it is located in the cabin, under the instrument panel on the passenger side. It should be noted that radiators are not clogged with dirt so often, they mostly leak. A stove radiator leak is determined by the appearance of antifreeze on the carpet under the front passenger mat. To replace the heater radiator, you need to pretty tinker, disassemble almost half of the entire cabin.
On cars of the VAZ 2110 and VAZ 2114 models, an air lock often forms in the cooling system, mainly it occurs:
due to loose connections in the nozzles (for example, the clamps are loosely tightened);
after replacing the coolant;
if PGBTs is broken.
The plug can be removed in several ways (provided that the head gasket is not broken), consider one of the options. To expel air from the cooling system, proceed as follows:
we put the car on a hillock so that the engine is higher in level;
unscrew the cover of the expansion tank;
pour antifreeze into the tank to the maximum;
we start the engine and warm it up to operating temperature, increase the speed somewhere up to 3000;
gently squeeze the lower radiator pipe with your hand, it is important not to burn yourself, do not close the cover of the expansion tank;
as air leaves the cooling system, the antifreeze will “fall through” in the tank, it must be added regularly. As soon as the bubbles stop appearing when you press the pipe, when the stove is turned on, hot air will begin to flow into the cabin.
Owners of VAZ 2114 cars sometimes face such a problem as a stove malfunction. This breakdown causes especially great inconvenience in winter: it becomes not only cold in the cabin, but the windshield is covered with an ice crust that closes the view. If the VAZ 2114 stove also does not work for you, you must first find the cause of the malfunction.
Problems with the interior heater can occur for various reasons, from electrical wiring to wear on the cooling system pump.
Next, we will take a detailed look at the main causes of a non-working or poorly functioning stove, where you will find a solution to repair your heater. As a rule, all malfunctions of the heating system can be divided into two categories:
Cold or slightly warm air is blowing from the ducts.
The heater does not turn on or does not work in all modes.
First, consider the reasons why the stove sometimes works worse or does not heat at all.
When the thermostat is not working, the coolant constantly races through a large circle of the system, as a result of which it does not warm up, and the stove does not heat up or blows slightly warm air. To solve the problem, it is necessary to check the operation of the thermostat and replace it if necessary.
It could also be an airlock issue. It can form if, after the engine is stopped, during the cooling of the coolant, air enters the upper part of the cooling radiator and moves to the thermostat. Starting the VAZ 2114 engine the next time, the water pump will drive air into the stove radiator (cold air blows from the air ducts). To remove the air lock, it is necessary to throw off the pipe going to the heater and add antifreeze to it to the top. The fluid level in the system must be at least a centimeter above the “maximum” mark. If there is not enough liquid, the stove blows not the hottest air.
If the stove blows cold at idle, the problem may be in the pump. The pump does not provide the necessary coolant circulation in the system. The same problems may be accompanied by a lack of coolant. When replacing the pump, pay attention to Belmag duralumin products. The previously popular HEPU pumps are often counterfeited, so it's better not to buy them.
Sometimes stove radiators become very clogged, and the only solution in this case is to dismantle the part, followed by cleaning and purging, or replacement. After that, the stove usually heats up like new. When replacing a heater radiator, some people buy Ukrainian-made products. Such radiators are characterized by very low heat transfer towards the passenger compartment, which is associated with their design features. Experienced VAZ owners recommend buying only DAAZ brand radiators, since the heater heats better with them.
To remove the VAZ 2114 heater radiator, you need to disassemble the front panel. If you do not have an assistant who can hold the dashboard on weight, then it is better to remove the entire console. Before starting work, drain all antifreeze through the radiator or drain hole in the engine block. Don't forget to put a clean container underneath.
To disassemble the front panel, you need to start by dismantling the center console, side panels and glove compartment. Unscrew all the mounting bolts and screws that will catch your eye. After removing the console and glove compartment, you will get to the bolts with which the panel is bolted to the body. Unscrew them, and then proceed to unscrew all the bolts that hold the panel to the metal. Don't forget the heater control cables. After making sure that the dashboard moves freely, it can be lifted or removed to the side.
Having done all the above operations, remove the pipes and pull out the stove radiator. Put something on the floor, because after removing the pipes, about half a liter of antifreeze should flow out. Drying mats and trim from coolant is not the most pleasant experience.
After replacing the radiator, all removed parts must be reinstalled by screwing in all the unscrewed bolts and screws.
Often, the VAZ 2114 heater does not work due to a malfunction of the faucet. Thus, if your stove blows cold, you need to try to tighten a special cable that can be reached from the side of the pedal assembly. You need to grab it with pliers and pull it back a little, increasing the tightness. If the stove tap does not open even in this case, it may have turned sour and needs to be replaced. Don't pull too hard or you may rip it off and coolant will leak into the cabin.
A faulty faucet causes the stove to stop blowing hot air. Also, the faucet has to be changed if it starts to leak. This leads to the appearance of greasy deposits on the inner surfaces of the glasses, the formation of wet spots on the floor, as well as the appearance of a characteristic smell of antifreeze or antifreeze in the cabin.With strong leaks, the carpet under the feet of the front passenger first gets wet, so experienced owners of VAZ cars recommend periodically inspecting this place.
If you decide to replace the stove faucet, you need to proceed in the following sequence:
Unscrew the drain plugs on the engine block and drain all the coolant;
Clean the studs on the faucet with an iron brush and moisten them with WD-40. This will make it easier to unscrew and keep you from breaking anything. If the pin breaks, the repair will be much more complicated;
The second category of malfunctions of the VAZ 2114 interior heater includes problems with the fan. To check its performance, it is necessary to check the first, second and third speeds. If you do not hear any noises, the stove motor is faulty. Why might the oven motor not work?
One of the simplest and most frustrating faults is a blown fuse. It is simple for the reason that anyone can replace the fuse, and it is unpleasant because it can be very difficult to determine why it has blown. As a rule, fuses blow due to a short circuit in the electrical wiring. On VAZ 2114 cars, a 30-amp F7 fuse is responsible for the stove, which also affects the cigarette lighter, glove box lighting, headlight washer electric motor and rear stack heating. Accordingly, all this will not work together with the stove.
To test the stove switch, you need a simple 12-volt light bulb with two wires. It is necessary to remove the central part of the instrument panel and do the following:
1. Turn on the ignition; 2. We close the negative contact of the light bulb with a wire to ground; 3. We connect the positive contact alternately to the outputs 1-2-3 on the additional resistor.
If the light comes on, the switch is OK. Otherwise, it could be a blown fuse or an open circuit. If only the third speed does not work, you need to replace the additional resistor.
The stove motor may burn out over time, but before proceeding with its replacement, check all fuses, the ignition relay, and the stove temperature switch for integrity. If all this is in order, the problem is in the motor. It must be replaced, having previously disassembled and removed the dashboard. How to do this, we described in detail above. You also need to remove the antifreeze or antifreeze from the system and turn off the heater valve.
After removing all the pipes, pull out the old furnace and install a new one in its place. After checking the performance of the heater, you can fill the cooling system with the previously drained liquid.
