With a broken stove, people in the car feel uncomfortable, both in winter and in summer. The stove is required to create a comfortable temperature; it is used to get rid of condensation on the glass; without it, the stability of the engine may be impaired. More often than not, the heater motor fails, and the popular Renault Logan car is no exception. You can solve the problem of replacing the motor yourself.
The heater motor for Renault Logan is supplied by two companies - Renault directly and a third-party manufacturer Valeo, both of them are considered original. Modifications are offered for cars with and without air conditioning. The first ones have a little more power, otherwise their design is identical, so repair and maintenance are no different.
Removing the heater system
Most Renault Logan owners are convinced that replacing the heater motor requires completely dismantling the front panel. The same position is described in the car repair and operation manual. Since such a process is quite expensive and inconvenient, many owners prefer to leave this problem unresolved. However, in reality, to dismantle the housing with the heater fan, it is enough to unscrew only a couple of screws. You can handle a similar task with your own hands.
But at the very beginning, make sure that the cabin filter is clean; sometimes, due to its contamination, air cannot get into the cabin. The filter is installed on the right side of the front panel.
If the car has a cabin filter, it is installed here (highlighted with a marker).
If the filter is clean and its condition does not give you any doubt, you can begin dismantling the “stove”.
Tool for the job
To dismantle the heater we will need the following tools:
- Screwdriver with straight blade.
- Phillips screwdriver.
- Plastic puller (or a regular ruler).
- TORX T20 key.
Sequence of work to dismantle the stove
- Remove the door seal.
To make it easier to remove the seal, you need to pry it off first.
- Using a screwdriver, pry up the plastic lining of the rack and remove it from the latches.
The plastic cover is fixed to the body using metal latches.
- After this, the first screw will be visible; use TORX T20 to unscrew it.
We unscrew this bolt using TORX T20.
- Then, using a flat-head screwdriver, carefully remove the plug in the lower right corner of the panel near the glove compartment and unscrew the second screw.
When unscrewing the plug, be careful not to break the latches.
- Now that the panel is not fixed, pull it towards you to create a small gap.
When pulling the panel away from the body, sudden movements should be avoided.
- Then we inspect the surface behind the panel to find the fan housing. It is not difficult to find, it is round and located not far from the cabin filter.
The fan housing is very hard to miss.
- After the stove fan is detected, remove the chip with the power cable from it and turn the fan housing clockwise to pull it out.
There are two types of fan designs, although the differences between them are minimal.
The first version of the stove has a wide electrical contact connector.
The second option is narrow.
Replacing the stove fan yourself
The Logan heater fan is integrated into one unit with the motor, so it is dismantled along with it. Many Renault Logan car owners say that to dismantle it, you need to completely remove the central panel of the car, but there is a way to do this by simply unscrewing two mounting bolts.
To remove the stove fan, first remove the facing of the right pillar, you need to carefully pry it off with a screwdriver and pry off the two latches. It opens the top screw, which is unscrewed with a T20 screwdriver. At the bottom of the panel there is a plastic plug, under which there is another self-tapping screw with the same head.
After unscrewing the screws, the plug is closed and the door seal is completely removed so as not to damage them during operation. Afterwards you can remove the fan.
The panel is carefully removed from the guide elements. The Renault Logan heater fan is located under the glove compartment, installed in the air duct. You can see it even if you cannot bend the panel as far as possible; all manipulations are carried out by touch.
First, carefully disconnect the electrical connector, then remove the Renault Logan heater fan. To do this, press the latch and turn it clockwise until it clicks and pull it out of the mount. This pulls back quite a bit on the right side of the dashboard, so you have to be careful not to break the plastic.
The two types of fans differ in connectors and mounting to the case. Replacing the stove fan with a Logan is carried out after dismantling the entire assembly. You remove the cover and see the motor, if it works, just lubricate it with ATF from a syringe. If this does not help, you can ring it, check the brushes, but most likely the heater motor will need to be replaced. After inspection, maintenance or replacement of the unit, it is installed in place in the reverse order.
You can remove and change the heater motor on a Renault Logan yourself. This does not require any special tools or equipment. The only difficulty is that dismantling and reinstallation will need to be done by touch. But with some skill, this does not pose a problem. In order for the new part to guarantee reliability, it is better to buy a heater motor from the original manufacturers, which Renault recommends, there are only two of them. After installation, you need to check the reliability of the panel, the lining of the right pillar and the rubber seal. If this is not done, extraneous creaks and drafts will make the ride uncomfortable.
Video: Replacing the heater fan (stove) for Renault Logan, Sandero, Duster, Lada Largus
Renault Logan is one of the most commercially successful models of the French concern. It is produced in seven countries and sold almost all over the world. It’s not for nothing that the car has earned the love of car owners.
It is compact but roomy, handles well, is cheap to operate and surprisingly reliable. However, even the most reliable cars have breakdowns. In harsh Russian winters, a malfunctioning stove can become a serious problem.
If the heater motor fails, repairs at the service center can be expensive for the Logan owner. However, you can save a lot of money by replacing this unit yourself.
Radiator replacement
Its replacement should be taken very seriously, as it is considered one of the important parts in the car. The work can be divided into the following stages:
- All coolant is drained
- All pipes are disconnected
- The cooling device is blown out and the floor covering is removed
- The radio is removed
- The central trim is removed along with the dashboard amplifier
- All screws on the radiator and pipes are unscrewed
- The latches on the body of the part are pressed out
- The broken element is received
After all the above work, a new radiator is installed
Self-replacement
Work to replace the heater motor must be carried out in the following sequence:
- the entire panel is removed;
- the air supply knob switches to the “air blowing to the upper part of the cabin” position;
- The power connector on the motor is disconnected;
- the fan rotates clockwise a quarter turn after pressing the latch, which helps to remove it from the case.
The listed steps are basic, so inexperienced drivers are advised to read the full instructions in the video presented.
On a Largus model car, replacing the stove will take a minimum of time if all actions are carried out carefully in the specified sequence.
It is important not to damage fragile components to avoid the need to replace them
Let's make sure that the problem is in the motor.
Despite the low prices for spare parts for Logans, the heater motor is far from cheap. The cost of an original spare part can exceed 5 thousand rubles. Therefore, it makes sense to check whether the problem is really with the electric motor. A number of signs of a heater motor failure coincide with the symptoms of other malfunctions, the elimination of which will cost much less. Let's consider all the options.
Fuse
If the stove does not turn on, the first step is to find out whether fuse F36, which is responsible for protecting the heating system from short circuits, has blown. The fuse box on the Logan is located at the end of the instrument panel on the driver's side. If the fuse is blown, replace it. If the device is in order, or after replacing it the stove still does not work, you will have to continue troubleshooting.
The heating system fuse can be found on the right side of the block.
Wiring and connectors
Wiring problems can also cause the heater to malfunction. First of all, you should check the connections in the motor area. If you find that the plug is not inserted all the way, correct it. And also check the integrity of the wires. If everything is in order with the wiring and connections, and the heater still does not turn on, you should move on to checking the motor itself, as well as the heater mode switch, which is located on the center console.
Before probing the wiring and connectors, the car should be de-energized for safety reasons.
Check whether the plug is firmly inserted into the power connector of the stove motor
Cabin filter
If the stove blows weakly, the problem is not necessarily the motor. It is possible that the cabin filter on your car is clogged. It is worth changing it every 15–20 thousand kilometers.
The filter is located in the lower part of the center console, in the footwell of the front passenger, but on some cars there is a plug on two screws in place of the slot. Filter elements were not installed on all Logans. If there is still a filter, remove it and check its condition. If it is clogged, be sure to replace it. To replace, use a new filter; a cleaned old one will only be clean in appearance.
You can get to the Renault Logan cabin filter from the front passenger side
Causes of poor stove performance
The reason that the stove does not heat well could be a broken fan motor or an air lock in the system. Sometimes the heater radiator can fail and lose its seal. Due to the design features of this product, it cannot be repaired, and if it fails, there is only one option - replacing the stove fan. The process itself is quite labor-intensive and if the owner does not have the necessary experience, it is recommended to resort to the help of a service.
Signs of a faulty Renault Logan heater motor
More often, the cause of a stove motor breakdown is wear and tear of parts over time, since rings, brushes and other moving parts will sooner or later fail. Less common are problems of an eclectic nature - oxidation of contacts or broken wires. Often the lubricant on the moving parts of the motor and fan simply runs out.
Signs that the Renault Logan heater fan is working in abnormal mode and the unit will soon fail can be determined by certain signs:
- the stove changes the sound during operation, the noise increases;
- the heat flow becomes uneven and weakens;
- The stove does not turn on the first time or takes a long time to gain momentum.
The stove whistles when operating
A whistle is heard from under the central panel and is a sign that the heater motor bearing has failed and if the motor is removed, you can see that the bearing has noticeable play on the shaft. Such a whistle indicates that the stove will soon break down and it is better to replace it. Sitting in the cabin becomes not very pleasant; the monotonous whistle is very tiring. If you simply lubricate the mechanism, this will not eliminate the problem for a while, but the whistling will inevitably resume.
The stove turns on poorly or does not turn on at all
On older versions of Logan, the stove simply stops turning on. If you hit the surface of the console on the right side, it began to work, sometimes with a characteristic noise. There are several reasons for the mechanism to jam:
- Throwing in a loose bearing.
- Development on the shaft.
- Lack of lubrication on mechanisms.
- The motor brushes are worn out.
Reduced air flow from the stove
This problem occurs when the curtains on the center panel are fully open. During the cold season, even with full power, the car still remains cold. The driver notices the problem only after a while; the windshield may not freeze at sub-zero temperatures, limiting visibility. Often in the fourth position the air flow is less intense than in the second.
The main reason for such a breakdown is a problem with the motor. Less commonly, the cabin filter is clogged. In this case, you need to disassemble the stove and inspect the engine and cabin filter. Only then will it be possible to identify and eliminate the cause of the malfunction.
Heating system design
It cannot be said that the Renault Logan ventilation and heating system is a weak point, but such a malfunction, especially in the cold season, promises unpleasant consequences. The operating principle of the interior heating system does not differ significantly from the device in other cars. But if the rear window heating does not work, then this can also spell trouble. To prevent this from happening, the main thing is to do a technical inspection online on time, which will help to identify faults in your car in a timely manner.
The heater radiator is connected directly to the cooling system, in which the coolant circulates (coolant, about replacing it here, about choosing a coolant here), which warms up within 95°C during engine operation. A special fan blows onto the hot radiator, which creates a strong air flow and directs it into the cabin through special air ducts. The quantity and speed of supply of heated air is regulated using a damper.
Signs of a malfunctioning stove
You should think about the upcoming repair and replacement of the stove motor if the following malfunctions are observed in its operation:
- An extraneous noise appeared when the stove was turned on.
- Warm air stopped flowing into the cabin.
- The speed of the incoming air flow has decreased.
- And of course, if the stove does not turn on at all. (However, in the event of such a malfunction, first of all analyze the condition of fuse F36, which is located inside the car. It is located in the green housing and is responsible for short-circuit protection of the heater system).
The fuse responsible for the operation of the stove is located on the right side of the block.
Removing and installing the heater of a Lada Largus car
Typically the heater is removed to replace the evaporator or to repair the heater.
Before completing the task, we discharge the air conditioning system, as described in the article - How to unload and load refrigerant from the Lada Largus air conditioning system
Draining the liquid from the engine cooling system (article - Replacing the Lada Largus engine coolant)
We remove the air intake with resonator assembly (article - How to replace the air filter of a K7M engine)
Removing the floor tunnel lining (article - How to remove the instrument panel of Lada Largus)
Removing the instrument panel
Inside the car, use a Torx T-20 wrench to unscrew the two screws securing the mounting block
Remove the fuse mounting block and leave it hanging on the wires
Using a 10mm socket, unscrew the two nuts.
Remove the terminals of the ground wires from the studs
Use side cutters to cut through the clamp securing the wiring harness to the cross beam
Using a screwdriver, remove the wiring harness holder from the steering column bracket.
We also remove five more wire harness holders from the cross beam
We remove the cross beam bracket (how to remove it is described in the article - Removing the heater elements of a Lada Largus car)
Remove the heated tailgate glass relay from the holder on the cross beam
Disconnect the wiring harness from the brake light switch
Using a 13mm socket, unscrew the four bolts securing the steering column
Lower the steering column to the floor
By pressing the latch of the wire block, disconnect the block of the heater fan wiring harness
Use a 10 mm socket to unscrew the nut.
Remove the ground wire tip from the stud
Using a Torx T-20 wrench, unscrew the screw securing the air duct
And remove the left air duct
We also remove the right air duct
Using a Torx T-20 wrench, unscrew the two screws securing the heater to the cross beam
Using a 13mm socket, unscrew the two bolts securing the transverse beam on the left side.
We also unscrew the two bolts securing the transverse beam on the right side
Removing the cross beam
We remove the upholstery from the front panel
In the engine compartment, use a 10 mm socket to unscrew the two bolts securing the air conditioning pipes to the gearbox
Disconnect the tubes from the gearbox
Squeeze the ends of the clamps with pliers and slide the clamps along the hoses
Disconnect the heater inlet and outlet hoses from the heater radiator tubes
Removing the heater from the car interior
Installation is carried out in the reverse order of removal, in this case:
— for vehicles equipped with an air conditioning system: remove the plugs from the pipelines and the evaporator unit, install new sealing rings on the pipelines.
Apply compressor oil to the sealing rings;
— perform evacuation of the air conditioning system and load the system with refrigerant, according to the operating instructions for the service equipment.
Check the operation of the heating, air conditioning and ventilation system.
Changing the fan
If after the above manipulations the stove still does not heat, the reason may be that the Renault Sandero fan or fuse F36 is broken. A common problem with its breakdown is wear of the brushes. Replacing them is quite simple, just have a Phillips screwdriver, then:
- Unscrew the screws from the housing cover that closes it.
- We check the condition of the brushes and, if necessary, replace them (the cross-section should be 4×4 millimeters and the length 2 centimeters)
- Putting everything back together in reverse order
During repair work, you need to lubricate the motor axis, after which the operation of the stove may improve. You can use ATF lubricating oil or its equivalent. Very rarely, the cause of a breakdown may be a blown fuse.
Signs of a malfunctioning heater motor
Problems with the stove on Renault Logan are not a common occurrence, but, alas, sometimes it happens. Let's look at the signs of a malfunction.
The stove whistles
One of the signs of a heater motor failure is a whistle coming from the center console when the heater is turned on. The stove begins to whistle if the bearing of its motor fails, as well as when there is play in the electric motor shaft, which, in turn, appears from a lack of lubrication. Many car enthusiasts try to fix this problem without replacing the mechanism. However, after lubrication, several months pass, and the stove begins to make noise again. Therefore, if a whistle appears, it is better to replace the heater motor.
The stove is jamming
You can often hear stories from owners of Renault Logan cars that the heater does not turn on until you hit the center console on the passenger side. The causes of jamming are most often the same, that is, problems with the bearing, shaft or lubrication. In addition, the stove may jam due to wear on the motor brushes. They can be replaced separately, but finding suitable ones can be quite difficult. In addition, replacing brushes does not guarantee proper operation of the unit.
Wear of the motor brushes leads to jamming and failure of the stove
The stove blows weakly
Car owners do not immediately notice this malfunction. Usually it comes to the point that in the fourth mode the stove works weaker than in the second before it breaks down. Low air supply intensity can mean either a breakdown of the electric motor or a clogged cabin filter.
The stove doesn't work
Everything is clear with this symptom. The driver turns the switch, but the stove does not make a sound. However, you should not immediately go to the store for a new heater motor. Like the previous malfunction, the inability to turn on the stove may be due to other reasons.
As we have seen, diagnosing heating system faults is not a difficult task and is accessible even to an inexperienced owner of a Renault Sandero. Knowing the main reasons why the stove fails to heat the interior, and methods for eliminating them, the owner will be able to quickly carry out repairs without resorting to the help of a service center. We hope our guide will be useful!
We recommend: Changing the front brake pads on a Renault Logan with your own hands (photos and videos)
What are the fan malfunctions and how to eliminate them?
The main cause of fan module failure is brush wear. Replacing the heater motor is not a difficult process. You should arm yourself with a Phillips-shaped screwdriver. Unscrew a couple of screws holding the case and remove it. We check the condition of the brush assembly and, if necessary, replace it with an analog part. Brushes with the following parameters are suitable for use: the cross-sectional profile is square with a side dimension of 4 mm, and the length of the product is 20 mm. If you purchased longer brushes, you will need to sharpen them to the required size.
As a mandatory step after assembly, lubricate the fan shaft. For this purpose, heat-resistant oil of the “ATF” class is suitable, used in automatic transmissions and power steering systems.
When the fan does not inspire hope for further “cooperation” with the heating system, we unconditionally replace it with a new one. When purchasing a product, we inspect the connector chip, remembering the duality of its design. A later modification of the fan is equipped with a narrow connector. To familiarize yourself in detail with the nuances of the procedure discussed here, we recommend watching a thematic video and replacing the heater motor will not seem difficult to you. When the owner is not confident in the success of this action, we recommend not to tempt fate with repair burdens, but to immediately trust in the skillful hands of selfless service workers, who will remove the stove motor in no time. The cost of this service ranges from 1500-1700 rubles. The choice is always up to the owner of Renault Logan!
