Do-it-yourself vaz 2114 stove repair only cold air blows
In detail: do-it-yourself repair of a 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 passenger compartment of front-wheel drive VAZ cars - in winter, Zhiguli is warm enough. But sometimes various problems arise - the stove blows with cold air (VAZ 2110, VAZ 2114, other Samara models).
In summer, car owners practically do not use the stove and remember about it only when the first cold weather sets in. If on VAZ 2114 (2115) cars the stove blows with cold air, there may be several reasons for this phenomenon:
the heater motor does not work:
stove radiator clogged with dirt;
air has entered the cooling system;
the head gasket is burnt out;
the stove faucet has soured and does not open;
a cable flew off the faucet, or it broke;
faulty thermostat;
insufficient level of antifreeze in the radiator;
low performance of the water pump.
On 2114 cars, it often happens that hot air blows only from the central deflectors, and cold air comes out of the dashboard on the sides. The reason for 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 is blowing cold air at idle and low engine speeds; while the car is moving, the interior warms up. The reasons can 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 passenger compartment of auto models VAZ 2110-2111-2112 are generally the same as on 2113-2114-2115, but on the "tens" and "dvenashki" there is also an additional automatic control system for the stove (SAUO), which may also crash periodically. The temperature sensor in the passenger compartment 2110 is located on the ceiling, and the damper is on the heater control unit, it is controlled by a micromotor gearbox. If the stove blows with cold air on VAZ 2110 cars, both the sensor itself and the heater control system may be faulty.
Video (click to play).
The search for a malfunction in the heating system of front-wheel drive VAZs should start 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 can hear how the oven motor changes speed when switching the turntable, most likely it is in good working order.
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 oven motor burned out.
If the motor only runs at maximum speed (third position), the resistor is most likely faulty.
When the stove motor burns out, it needs to be replaced. We carry out the work to replace the part as follows (for example 2114):
remove the decorative trim from the driver's side in the cabin;
Now it remains to install a new part, and fix all the removed parts in place.
The stove may blow out with cold air due to a malfunction in the cooling system. If the stove motor is serviceable, we look 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, top up the antifreeze to the desired level if necessary;
we 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", often the reason for this phenomenon is a punctured head gasket. Cylinder head burnout may be accompanied by the following symptoms:
Antifreeze spills out of the expansion tank.
The gauge in the instrument panel shows a high temperature.
The engine is troit.
Antifreeze gets into the oil, the engine oil brightens.
If it breaks through the cylinder head gasket, often cold air blows into the passenger compartment only at low revs, when gas is poured, the cooling system "breaks through", and hot air begins to flow into the passenger compartment. Very often, replacing PHBC will solve 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 flow into the stove radiator. The problem with the heater tap is that it sour over time, and the damper in it stops moving. To prevent the valve in the faucet from souring, 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 tap fully open, the pipes should be equally hot. Changing the heater faucet is quite troublesome, so you should buy good quality original parts for replacement.
Over time, the heating radiator of the VAZ 2108-15 may clog; on the VAZ it is in the cabin, under the dashboard on the passenger side. It should be noted that the 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 tinker a lot, disassemble almost half of the entire interior.
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 PHBC is broken.
The plug can be removed in several ways (provided that the head gasket is not punctured), 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;
we turn off the cover of the expansion tank;
pour the antifreeze into the tank to the maximum;
we start the engine and warm it up to operating temperature, increase the speed to somewhere around 3000;
gently squeeze the lower radiator pipe with your hand, it is important not to burn yourself, do not close the expansion tank cover;
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 the nozzle is pressed, when the stove is turned on, hot air begins to flow into the cabin.
Owners of VAZ 2114 cars sometimes face such a problem as a stove malfunction. This breakdown is especially inconvenient in the winter: it becomes not only cold in the cabin, but also the windshield is covered with an ice crust, blocking the view. If your VAZ 2114 stove does not work either, you must first find the cause of the malfunction.
Problems with the interior heater can arise for various reasons, from electrical wiring to deterioration of the coolant pump.
Next, we will take a closer look at the main reasons for a non-working or poorly working stove, where you will find a solution to repair your heater. As a rule, all heating system malfunctions can be divided into two categories:
Cold or slightly warm air is blowing from the air 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 is constantly chasing around 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 with slightly warm air. To solve the problem, it is necessary to check the functionality of the thermostat and replace it if necessary.
There may also be an airlock. It can form if, after stopping the engine during the coolant cooling, 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 is blowing 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 liquid level in the system must not be below the “maximum” mark or one centimeter above it. If there is a lack of liquid, the stove does not blow with the hottest air.
If the stove is blowing cold at idle, the problem may be with the pump. The pump does not provide the necessary coolant circulation in the system. Lack of coolant can also be associated with the same problems. When replacing the pump, pay attention to Belmag duralumin products. Previously popular HEPU pumps have become often counterfeited, so it is better not to buy them.
Sometimes the radiators of the stove are heavily clogged, and the only solution in this case is to dismantle the spare part, followed by cleaning and blowing, or replacing. After that, the stove usually heats up like new. When replacing a heater radiator, some buy products of Ukrainian origin. Such radiators are distinguished by very low heat transfer towards the passenger compartment, which is due to their design features. Experienced VAZ owners recommend buying only DAAZ 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 torpedo in weight, then it is better to remove the entire console. Before starting work, drain all the antifreeze through the radiator or drain hole in the engine block. Do not forget to place some clean container underneath.
To disassemble the front panel, you need to start with dismantling the center console, side panels and the glove compartment. Remove any mounting bolts and screws that catch your eye. After removing the console and glove compartment, you will reach the bolts that secure the panel to the body. Unscrew them, and then proceed to unscrew all the bolts that hold the panel to the metal. Don't forget about the heater control cables. After making sure that the dashboard moves freely, it can be raised or removed to the side.
After completing all the above operations, remove the pipes and pull out the stove radiator. Put something on the floor, as after removing the pipes, about half a liter of antifreeze should flow out. Drying out the mats and trim from the coolant is not a pleasant experience.
After replacing the radiator, all the removed parts must be reinstalled by screwing in all the unscrewed bolts and self-tapping screws.
Often, the VAZ 2114 heater does not work due to a malfunction of the faucet. Thus, if your stove is blowing cold, you need to try to pull up a special cable, which 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 tension. If the stove tap does not open even in this case, it may have soured and needs to be replaced. Do not pull too hard, otherwise you may rip it off and coolant will leak into the passenger compartment.
A faulty tap 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 internal surfaces of the glass, the formation of wet spots on the floor, as well as the appearance of a characteristic smell of antifreeze or antifreeze in the cabin.In case of severe 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 loosen and prevent you from breaking anything. If the pin breaks, the repair will be much more difficult;
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 noise, the stove motor is faulty. Why might the stove motor not work?
One of the simplest and most unpleasant malfunctions is a blown fuse. It is simple for the reason that everyone can replace the fuse, and it is unpleasant because it can be very difficult to determine why it has blown. As a rule, fuses are blown due to a short circuit in the electrical wiring. On VAZ 2114 cars, the 30-amp F7 fuse is responsible for the stove, on which the cigarette lighter, glove compartment illumination, headlight washer electric motor and rear stack heating also depend. 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 minus contact of the light bulb with a wire to ground; 3. The positive contact is connected alternately to outputs 1-2-3 on an additional resistor.
If the light comes on at the same time, the switch is good. Otherwise, it may 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 starting to replace it, check all fuses, ignition relays, and the stove temperature switch for integrity. If all this is in order, the point is in the motor. It must be replaced by first disassembling and removing the dashboard. We described in detail how to do this above. You also need to remove the antifreeze or antifreeze from the system and turn off the heater tap.
After removing all the pipes, remove the old oven and replace it with a new one. Having checked the heater's performance, you can fill the cooling system with the previously drained liquid.
