Why does it heat badly on the prior. What should be done if the heating does not work well in the Lada Priora car. Heater air damper
Often Russian motorists who operate Lada Priora complain that the stove does not work well in the cabin vehicle cool, the side and windshields car. In order to understand why the stove on the Priore stopped working, let's consider the design of the entire heating system on cars of this modification.
Priora interior heating system
The vehicle is equipped with a stove (heating system) with a climate complex, which serves for comfort during a trip in a car. They are designed to eliminate problems in the event of a cold snap or other weather changes. No one will ask the question why the stove in Prior does not work, neither the driver nor the passengers.
The composition of the climatic complex of the car includes:
- actual stove (heater);
- stove fan device;
- temperature sensor in the cabin;
- housing part of the air distributor;
- air lines;
- deflectors (directing the flow of air masses).
The air flow from the stove is transmitted to the body of the air distributor, from where it is directed through the air lines. Through the air ducts, the flow rushes to the blower grilles of the windshield and side windows, to the guides for the flow of air masses in the center and side dashboard, as well as to the lower plane of the cabin to the floors on the bottom of the body. With the advent of frost, defects in the heating system appear, the most unpleasant of which is that the Lada Priora stove and other malfunctions do not work.
Malfunctions of the car heating system
In a Lada Priora car, the stove regulator does not work due to a malfunction of the multi-position switch or a defective blower fan. When troubleshooting this malfunction, when the Priora stove fan does not work, you should look at the fuse box, which serves as the main supplier of trouble for the operation of the ventilation device. Many defects in the car's climate system are directly related to the operation of the vehicle's cooling system.
If the fan device is serviceable, but the stove on the Priore does not heat well, then the defect should be searched for by a consistent method of cutting off the checked elements. So, the stove on the Priore does not work well and it is rather cool in the cabin:
First step: on a motor brought to the optimum temperature, we check 2 pipes connected to the heater for temperature values. If both products are hot, then there is no circulation of air masses, and if one pipe is hot and the other is cold, then this indicates the absence of an aqueous solution circulation in the system. We carry out diagnostics of the heater tap in order to deal with the solution of the cooling system (water, antifreeze).
To this end, open the hood and move the faucet from one position to another. If there is a leak from the heating system, then it must be eliminated, because. an insufficient amount of coolant can provoke a situation where cold air blows from the Priora stove and it becomes cool in the cabin. If the valve is rusty and not adjustable, you can leave it in this position for summer time when the heating system is not in operation. Closer to the cold it needs to be replaced.
Second phase: when the faucet is in the working position and the stove refuses to work, remove filler plug radiator tank and look for the presence of coolant liquid. In the case of the formation of the so-called. “Plugs from the air” we bring the level of the coolant to the maximum value (sometimes it happens that cold air blows from the stove in the Priore due to a lack of coolant liquid). After that turn on power plant and sharply press the accelerator pedal several times, which will provoke a coolant circuit and under its influence the water pump will squeeze out the air layer plug.
In order for the air masses to move faster to the outlet level, it is required to drive to an elevation so that the radiator is lower than the radiator of the cooling system. So, the circulation of the cooler has been restored, 2 pipes have become hot, but the stove on the Prior does not work well anyway?
Third stage: the dampers may not work, because the open lever on the instrument panel does not mean at all that the dampers have duplicated this command. Failure of the dampers may be associated with loosening of the mounts of the heater rods and taps, which blocks them in the summer mode.
It will not be redundant open bonnet check whether the shutters of the Priora stove are working or not, and also clean the heater from last year's debris and foliage. If even after these cleaning measures the system does not work well or does not function at all, the interior heater, then we go directly to the pipes.
Fourth stage: check temperature regime pipes when the stove is on. If the fan is in working condition, two nozzles are hot, but one starts to cool after a while - it is necessary to change the water pump due to poor coolant circulation. Some motorists manage to install a small water pump under the stove radiator.
Having started testing the heating system, we bring technological process to end:
- The coolant level in the expansion tank must be between the "min" and "max" marks.
- We are testing the coolant circulation process in the expansion tank. Its absence is defined as a defect in the water pump or clogging of the cooling complex.
This completes the diagnostics of the heating system.
The car "Lada-Priora" enjoys the well-deserved love and respect of our compatriots. A good value for money, the prevalence of spare parts and excellent maintainability make it the leader in the domestic market. However, being the result of a Russian development, this car also has some drawbacks.
As you know, Priora is a deep restyling of the previous model - the 2110th. Therefore, most of the components and assemblies have moved from the "tens", including the installation of a heating and ventilation system for the cabin. Most of the main details of this system are "decimal".
Therefore, such unification is very helpful in the repair. Unfortunately, this feature goes sideways in the event of a malfunction. There are quite frequent cases when the stove on the Prior does not work. The situations are different. In one case, problems may be with the fan, in the other - with dampers, etc.
Main reasons
There may be several reasons why the stove does not work on the Priore:
- Incorrect functioning of the thermostat.
- Clogged radiator
- Incorrect operation of the heater damper motor or heater motor.
- Malfunction of the heater control unit.
- Incorrect operation of the cabin air temperature sensor.
Preparatory stage
Troubleshooting of the heater operation should be started provided that power unit and the engine cooling system is in order to exclude their influence. To do this, you need to make sure that the antifreeze is filled in the proper amount, the engine is in good working order and is functioning normally. And after that, find out why the stove on the Prior does not work. First, check the coolant level in expansion tank. Next, you need to start the engine and warm it up to operating temperature. After that, you need to check the health of the thermostat - feel the thick hoses that go from it to the car radiator.
The top should gradually become hot. If the rubber tube is still cold, then the thermostat is defective. In this case, you can continue to work only after replacing this element. Fortunately, its cost is low.
Another reason why the engine may not warm up to operating temperature is a leaky expansion tank cap. It should keep excess pressure in the system. Often a simple replacement of this cover can completely get rid of problems.
On the "Prior", in contrast to the "tens", the organization of the cooling system is performed differently. And the formation of an air lock there is practically excluded. It can occur when the system is leaking or when antifreeze is poured into a completely empty expansion tank. It is eliminated quite simply. It is necessary to drive the front wheels on some hill in a warm car and energetically turn off the gas on the spot. The cover of the expansion tank must be removed.
Heater radiator malfunctions
Another reason that the Lada Priora car does not work from deflectors) may be the accumulation of dirt in the heat exchanger. During the operation of the cooling system, deposits accumulate in the engine block itself over time, which are then carried throughout the system, including into the stove radiator. These deposits interfere with its efficient operation. The system will heat the air worse. In this case, the stove radiator can be replaced entirely. It comes out from the engine side. Before starting work, it is imperative to drain the antifreeze from the cooling system. Then dismantle the windshield wiper arms, the “jabot” trim and move a part of the soundproof shield. After that, disassemble the body of the stove, disconnect the wires, remove the fan motor together with the impeller and remove the heat exchanger by disconnecting the supply hoses from it.
Problems with damper gearmotor or fan motor
A common malfunction on a Lada Priora car is that the stove does not work. Doesn't blow air at all.
First, you should make sure that it works - at least cold air should blow from the deflectors. If not, then you need to check the integrity of the fuse F9.
If it is intact, then the stove fan is not working. "Priora" is equipped with a "decimal" fan. Therefore, removing it exactly repeats the procedure on the "top ten". In some cases, the fan does not spin because leaves or other foreign objects have fallen between the impeller and its housing, which can block rotation. In this case, you can hear a characteristic hum.
Cold air from the deflectors can also come out because the gearmotor that controls the damper, which blocks the flow of hot air, does not work. It is also accessible from under the hood.
Often the reason for the failure of the gearmotor is the oxidation of conductive contacts. They must be cleaned with sandpaper by disassembling the case. You should also pay attention to the strength of the air flow. Even if on top speed the air blows weakly, it may be a clogged cabin filter. It is located under the hood in the heater housing and creates additional interference.
Auxiliary resistance failure
Often there are situations when the stove switch on the Prior does not work - the motor functions only at the fourth speed or only at the first. The reason here may be additional resistance, which slows down the rotation of the stove fan.
This resistance is a block of resistors (the fourth speed is direct, without slowing down). It is located in the heater housing on the left side and fastened with two screws. This resistance is also unified with many domestic models (2110, Kalina, Chevrolet Niva).
Incorrect operation of the cabin temperature sensor
There is another reason why the stove on the Prior does not work correctly. It occurs due to a malfunction of the cabin temperature sensor. It is located in the ceiling light.
The element, by measuring the air temperature in the cabin, instructs the damper gearbox to open or close. Thus, the microclimate in the cabin is regulated. Its correctness should also be checked.
Heater control unit malfunctions
The operation of the heating system is completely dependent on it. It distributes air flows, the intensity of blowing the various areas of the cabin and the temperature regime. If it fails, the stove, of course, stops working.
There may be malfunctions of the switches ("twists"). A malfunction of the control unit should be checked last, since this unit is electronic and rarely repairable. Therefore, for verification, it is advisable to temporarily replace it with a known working one, borrowing it from a friend or in a store on bail.
Features of the heater in the "Prior" with air conditioning
A common reason why the stove (Priora with air conditioning) does not work is the failure of the speed control unit (RFV), which is located on the heater housing under the hood. It regulates the intensity of the fan motor. If it fails, the stove ceases to function at all or operates only at the fourth speed.
The cause of the malfunction is often the prolonged operation of the heater in the recirculation mode (with the air damper closed) and, as a result, its overheating. Therefore, its performance should also be checked.
Conclusion
Thus, finding the reasons why the stove on the Prior does not work is not such a difficult task. The main thing is to follow a clear sequence of actions and understand what the operation of a particular node depends on.
Why does the stove not work on Lada Priora
Lada Priora is in many ways similar to its progenitor VAZ of the tenth family, including the heater device. The manufacturer decided to leave the principle of operation of the stove, replacing only some elements with new ones. Along with this, Lada Priora inherited familiar problems, for example, when the stove does not heat up and blows cold air.
Elements of the heating system (stove)
The fact that the Priory stove is 95% similar to the "ten" can be seen by the catalog numbers:
- Heater assembly (2170-8101012 or 2111-8101012-10).
- Airflow distribution gearmotor (2170-8127100). Distributes airflow to feet/face/windshield. It is located inside the dashboard.
- Cabin air temperature sensor (11186-8128050). Located on the ceiling.
- Heater control controller (KUO) or stove control unit (21703-8128020). The block on which the driver sets the parameters for the operation of the stove. Located on the panel.
- Resistor additional or additional resistor (2123-8118022). Determines the speed of the oven fan. Anchored in engine compartment.
- Heater electric fan (2111-8118020). Located under the hood.
- Heater damper motor reducer (2110-8127200). Distributes air flows into the cabin (street / stove radiator). Inside the heater assembly.
- Air filter (2110-8122020).
- Stove radiator (2110-8101060). located inside the heater.
A malfunction of one of these elements causes problems in the operation of the stove.
The principle of operation of the stove
To independently determine the malfunction of the heater, you should understand the principle of its operation.
The heater control controller receives a signal from the interior temperature sensor and compares it with the temperature set by the driver. If there is a difference, then the KUO sends a signal to the stove gearmotor (located under the hood) to close or open the stove dampers by a certain amount for a greater supply of cold or hot air.
After setting the desired speed of the stove fan, the heater control controller sends a signal to an additional resistor (in the engine compartment), which, due to the built-in resistance, sends a corrected signal to the fan. At maximum speed, the resistor is not used and the electric fan rotates at maximum speed.
The direction of the air (face / legs / windshield) is determined by the driver, setting the required value on the KUO. After that, the signal goes to the air flow distribution gearmotor (inside the panel / dashboard), which moves the dampers in the right direction.
If the stove blows cold air (does not heat)
There may be several reasons why the Priora stove does not heat well (the percentage of breakdown according to the results of a survey among the owners of this car is indicated in brackets):
- Malfunction in the engine cooling system (the stove radiator is cold and cannot give off heat). Feel both heater radiator hoses, they should both be hot. Sometimes the reason lies in the radiator itself (defective, insufficiently productive) (8%).
- Dirty cabin filter. Try to temporarily remove the filter and check the operation of the stove (2%).
- The stove damper does not work, it just jammed (17%).
- Faulty stove gearmotor (16%).
- Cabin air temperature sensor defective. Try turning it off for a while and check the operation of the heater (6%).
Points 3-6 can also be the reason when only hot air from the stove constantly blows.
The mode switch does not work (face / legs / glass)
Possible reasons (in parentheses is the percentage of breakdowns according to the results of a survey among the owners of this car):
- The heater control controller is faulty (13%).
- The gearmotor for distributing the air flow inside the passenger compartment is faulty (8%).
The stove only works in position 4
If the first, second or third position of the stove does not work, therefore (in parentheses the percentage of breakdowns according to the results of a survey among the owners of this car is indicated):
- Faulty stove resistor (7%).
- Faulty heater control unit (13%).
If the stove is noisy
Perhaps the bearing of the electric fan is buzzing (17%). Also, additional noise can be caused by a dry leaf that has fallen under its blades.
The oven does not turn on
- The fuse for the stove F9 (25A) has blown.
- Faulty heater control unit (13%).
Conclusion
The car heater is not a simple system, and according to the owners, it is not entirely reliable. Try to determine the malfunction of the stove, starting with a check, and then replacing parts with known good ones. Do not forget that the cause may also be in poor contact or a broken wiring in the car.
We already wrote that the heater VAZ 2110 and Lada Priora are very similar, you may find a lot of useful information on their website. What problems have you had with your stove? Did you manage to solve them? By participating in the survey, you are helping other motorists identify the causes. Read also other articles on the repair and operation of Lada Priora.
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With the onset of cold weather, the first malfunctions of the Lada Priora heater begin to appear. The situations may be different, in one case there may be problems with the fan, in the other with dampers, etc. Today we will tell you how to properly repair the stove on Priore with your own hands.
Problems in the engine cooling system?
As practice shows, most Priora stove malfunctions occur due to SOD (engine cooling system).
In this case, the procedure is as follows:
1. We check the level of coolant (coolant) in the expansion tank so that it is between the “MIN” and “MAX” marks. If the coolant has to be topped up all the time, then the cooling system is leaking somewhere. You should carefully inspect all pipes for leaks, and also tighten the clamps. By the way, in order for warm air to go into the cabin faster, many motorists in winter specially add coolant only to the “MIN” mark. After all, the less liquid there is in the system, the faster it will heat up.
2. We check the coolant circulation in the SOD, paying attention to the expansion tank.
Video example:
If there is no antifreeze circulation, or it is not sufficient, then the pump may be faulty (it should be replaced) or the cooling system may be clogged.
In the winter months, find out why the stove does not work and blows cold air on the Priore (or on another typewriter domestic production) as soon as possible. Of course, you will not turn into an icicle and do not risk freezing anything for yourself. But driving with a non-working heating is at least unpleasant and fraught with all sorts of colds.
And going to the track is completely dangerous: God forbid, something breaks, you really freeze until help arrives in time. Priora is a generally recognized descendant and successor of the Lada-"tens".
And the manufacturer did not make fundamental design changes to the stove, only individual elements. Accordingly, the diseases inherent in the ancestor were inherited by the descendant. All owners of Priora unanimously assure that the heating system in it is very unreliable and can break down at several nodes. Worst of all, in the summer, few people remember the stove and are puzzled by the check. Therefore, discomfort is detected suddenly and requires lightning-fast action.
Why does the stove not work and blows cold air on Priora? There are many reasons for this. In descending order of frequency of occurrence, they can be arranged as follows:
- Stove damper jammed. It does not open and does not let warm air into the cabin. By the way, the opposite is also possible: if it is closed in the open position, you begin to feel like in a sauna;
- The heating motor reducer broke down;
- The stove control unit does not work;
- Malfunctions in the engine cooling system;
- The temperature sensor in the cabin has broken, and the heating system simply does not know that you are cold. Again, in a similar but opposite case, it can be hot.
Clogged filter
Experienced owners of Prior have developed an algorithm of actions to find out what the heating system is leaking.
First approach
Before all checks, you need to make sure that the fan is working - it would be unwise to climb deeper if the main element is not spinning. Further actions are as follows.
- The engine is heated to the desired temperature;
- The pipes leading to the heater are felt. Both are hot - order, one has an ambient temperature - which means there is no filler circulation;
- The hood opens, the tap is located and rotated to another position. If he has become attached, you will have to urgently soak him.
- The system is checked for leaks. Detected are eliminated: a constant lack of coolant is also the cause of cold blowing;
- The tap works, there is no leak - the plug is removed from the tank and the liquid level is checked. Often an airlock forms in the tank; in this case, the cooler is topped up to the norm, and the gas pedal is sharply pressed several times. The fluid cycle will resume and squeeze the plug out of the reservoir;
- For greater efficiency of the last step, it is better to drive the front end to the nearest hillock so that the radiator of the car is lower than the radiator of the stove.
Second approach
When (or if) both nozzles are filled with hot liquid, go to the dampers.
- Again you have to climb under the hood, this time to observe the operation of the damper;
- If it is warped or jammed, you can try to gently shake it with your hand from inside the cabin. To do this, the central deflector is removed, the plastic guides are unscrewed to reach the stuck element. Access is possible only for a thin limb, so it is advisable to invite a female person to the procedure, if she does not mind;
- In case of serious problems with the damper (the fasteners rusted, the plastic led to the temperature or it cracked), alas, hard work awaits you: you will have to disassemble half of the heating system.
Third Approach
Microreducer and completely solid headache. First, its status is checked:
- The left handle is moved to the "min" position. After a 15 second wait, the engine starts;
- The controller is disconnected, which watches over the SAUO;
- The tester measures the readings on both contacts. Resistance should be 800-1200 ohms for units 1303.3854; 1313.3854 and 1333.3854; for the controller 1323.3854 the norm is 3600-5000;
- The same operation is carried out at the “max” position. Now the data is in the range 3200-3500 for the first group and 1200-1600 for 1323.3854;
- In the absence of resistance or its invariability, the track has been erased on the sensor. It is not sold separately, so you will have to change the entire MMR. It is clear that not all the reasons why the stove does not work and blows cold air on the Priore can be eliminated on their own.