Removing the Renault Logan heater - Auto magazine Acord-Auto

Purpose of the heater radiator for Renault Logan

The heating radiator on Renault Logan performs the same function as the main radiator in the engine cooling system - it acts as a simple heat exchanger.

Heating radiators for Renault Logan are usually made of aluminum

The principle of its operation is simple. Antifreeze heated by a hot engine enters the firebox radiator, which is intensively blown by a small fan that forces hot air from the radiator grilles into special air ducts. Through them, hot air enters the car interior and heats it. The heating intensity is regulated by changing the fan rotation speed and changing the angle of rotation of a special throttle valve to admit cold air from outside.

On a Renault Logan car, the heating radiator is a regular heat exchanger

Location of the heater radiator in Renault Logan

The heating radiator is located under the instrument panel, almost at the level of the cabin floor, on the driver’s right foot. It is impossible to see it, since it is covered on all sides with plastic panels and interior upholstery. And to get to the radiator and replace it, all this coating will have to be removed. The main part of the work to replace this device involves disassembling the lining.

How to remove the heater on a Renault Logan video

Each component in any car tends to “delight” the Renault Logan owner with its breakdowns over time. Also, malfunctions are not alien to the practical French “hard worker” - Renault Logan.

Regarding the heating and interior ventilation system in this model, we note that this unit cannot be classified as a weak link. The failure of one of the elements of this system has a painful effect on the owner and his passengers, which is especially important during the cold season.

And then the heater motor needs to be replaced. In any case, you will need to remove the heater motor.

The operating principle of the Renault Logan heating system is based on a scheme similar to many other cars. Here the heater radiator is connected to one hydraulic circuit with the engine cooling system. An important component of the unit is the fan.

By creating a flow due to its rotation, the fan “takes” air from the radiator surface and directs it into the cabin through air ducts and deflectors. The temperature of the air flow supplied inside the cabin and its intensity are regulated by means of a damper assembly and a speed mode switch.

If there is no fact of air penetration into the cabin or a characteristic noise has arisen, clearly distinguishable through the deflectors, then this indicates a malfunction in the operation of the Renault Logan car fan or its complete failure.

Some owners claim that to ensure repair work on this unit, it will be necessary to dismantle the front panel. This is true, as evidenced by the action manual displayed in the documentation from the manufacturer. This procedure is not cheap if you use a service, and it takes a lot of time.

In a real situation, to monitor the performance of the fan in a Renault Logan, you will need to unscrew a couple of screws. An ordinary owner can handle this manipulation at home.

Before dismantling the panel, it would be rational to check the cabin filter. When its permeable element is clogged, then, naturally, the flow of air into the interior will not be detected. The filter module can be found next to the glove compartment on the right area of ​​the panel. If this component is working properly, then we look at the fan module.

What tool is better to stock up on?

To successfully carry out the repair procedure on our own, we will have to use the following list:

• Phillips and flathead screwdrivers;
• special key “TORX T20” with a “star” profile;
• plastic puller or short ruler.

The revision action can be completed in half an hour. After this, the heater motor is removed.

How to dismantle the fan?

The work involves performing actions on the right side of a Renault Logan car.

1. We dismantle the rubber seal on the upper edge of the front door.
2. Using the puller indicated earlier, we remove the decorative trim on the front (right) body pillar. The design of its fastening assumes the presence of latches. We recommend performing this action in warm weather conditions or in a heated box. This is required in order to avoid breakage of the plastic fasteners of the lining, which become more fragile in cold weather.
3. Having dismantled the cover, we gain access to the first screw, which we “defeat” with a “star” wrench.
4. The second mounting point for the panel is located below the glove compartment. It is hidden under a plug that should be removed immediately. Now unscrew the screw with a TORX wrench size “20”.
5. Carefully place the right side of the front panel towards you. A gap opens, into which we penetrate with our hand and find the heater fan. The element is equipped with a round body. It is not possible to inspect it, so we carry out all actions by touch. Not entirely inconvenient, but possible.
6. To remove the fan, rotate its housing in the direction of the clock hand. Disconnect the power supply connector. We remove this unit from under the dashboard and check it visually. Renault Logan has two types of fans, which differ slightly (wide or narrow connector).

Causes of heater malfunction

If the interior of your Renault Logan becomes colder, you should not fall into depression and anxiety, since most stove breakdowns can be repaired yourself. So, let's find out which injuries are more common in older people. Renault Logan concerned the operation of the internal heater.

1. The air chamber in the heat exchange system does not heat the radiator.
2. The thermostat is faulty, the motor does not heat the liquid.
3. The water pump is not working properly.
4. Logan's hammer clattered.
5. Engine malfunction.
6. Little or no airflow.
7. Faulty fan motor.
8. The fan speed controller has failed.
9. Renault mixer does not work.

The most common malfunctions in the heating system are listed above. Renault Logan. Below we will talk about each problem separately.

Problem solving

To solve the problems of the heater heater, we will try to reveal the essence of each of them.

1. An air gap in the Renault heating system can be caused by premature replacement of antifreeze. Typically, the cooling system of a Renault Logan car is designed to automatically remove air pockets. The video tutorial shows how to replace the timing belt and drive belt on a Volga Cyber ​​with your own hands. Despite the impeccable design, when cooling, as a rule, air pockets still appear. You can easily remove the air lock on your Renault Logan. Removing the front bumper on a Renault How to securely attach the bumper, part 1, item No. 196. Disconnect both pipes from the internal heat exchanger, then, connecting each pipe in turn, pour coolant into the expansion tank. After such manipulations, antifreeze should flow through the opposite pipe, after which a second pipe should be inserted. How to remove and install thresholds on Renault Duster: photo. Usually the oven heats up much better after this.
2. If the thermostat does not work on the Renault Logan, the engine does not reach the desired operating temperature and the coolant cannot heat the heater radiator. It is enough to solve this problem by replacing the thermostat, the advantage is not difficult. The thermostat housing is located at the bottom of the cylinder head next to the gearbox housing.

Step-by-step instruction

Before starting work, the coolant must be drained.

1. Pull the bottom cover out of the latches and remove it. Take it as shown below and pull it to the sides (towards the doors).

2. Remove the clamp to move the carpet to the side. The clip can be pulled out with a flat screwdriver.

3. We have access to the bolts for fastening the rod that supports the rack and the torpedo is already attached to this rack. To gain access to the radiator, you need to remove the bar.

Unscrew the two bolts that are marked in the photo below.

4. Squeeze the sides and press in the clamp shown below. The harness is attached to this clamp.

5. Remove the ignition switch connector from the bracket. Squeeze the latch and tighten.

6. After removing the connector, we gain access to the track mounting nuts. Unscrew the fastening nuts and remove the bar.

Once you remove the bar, take your time, you still need to disconnect the wiring.

7. After removing the strip, we had access to the heater radiator.

8. Remove the three T20 Torx screws.

9. Place a rag under the injectors and pull them out.

10. Open the latches and remove the radiator.

The latches literally do not bend, just press them and remove the radiator.

11. Before installing a new radiator, it is recommended to blow out the seat with compressed air or clean it manually.

12. Replace the O-rings on the pipes. After replacing the rings, lightly lubricate them so that they can easily enter the radiator.

13. Install the radiator.

14. Secure the radiator with two screws.

15. Insert the pipes into the radiator and secure the mounting plate with a screw.

Make sure that when tightening the screw, the sealing rubber does not bite.

16. Next, fill in coolant, bleed the system, and remove air. Checking the tightness of the pipes.

17. If there are no leaks, install the metal rod and the rest. I don't think details are needed here.

Removing the heater radiator Renault Logan

We remove the heater radiator for replacement if a coolant leak is detected through the radiator. Drain the coolant (see “Replacing Reno Logan coolant”). We remove the instrument cluster (see “Removing the Renault Logan instrument cluster”). Remove the lower trim of the instrument panel console (see “Removing the Renault Logan instrument panel”). On the left side of the console we pull out the piston to secure the mat to the crossbar bracket...

. and bend the edge of the lid.

Using the “13” head, unscrew the two bolts of the lower fastening of the cross member bracket (the instrument panel has been removed for clarity).

Through the hole in the instrument panel (under the instrument panel), using a “13” key, unscrew the two nuts of the upper fastening of the cross member bracket.

We take out the wiring from the supports located on the inside of the bracket and remove the bracket crossbar.

Using a Torx T-20 wrench, unscrew the screw securing the pressure plate of the heater radiator hoses.

We pull out the pipes from the holes in the heater radiator tank.

Rubber O-rings are installed at the ends of the pipes.

Using a Torx T-20 wrench, unscrew the two screws for attaching the radiator.

After releasing the three latches...

... Remove the radiator from the heater housing.

Before installing the radiator, replace the rubber O-rings at the ends of the hose. Install the heater core in reverse order

The process of replacing the stove radiator

To replace the stove (heater) radiator of Renault Duster, Lada Largus and other models on this platform, you need to wait until the engine has completely cooled down to avoid incidents with hot antifreeze. Open the expansion tank cap slightly to release pressure in the system.

If the radiator is clogged and a complete replacement of antifreeze is required, it is drained through a special plug or pipe at the bottom of the engine cooling system. If you do not plan to replace the coolant, it is possible to remove it only from the heater radiator.

Next, the air duct is removed, blocking access to the pipes leading directly to the stove. They are secured with spring clamps, which can be easily removed without requiring replacement. The pipes are clamped with plastic clamps. To prevent antifreeze from getting inside the cabin, we place a plastic bottle with a volume of up to 1 liter under the lower pipe, and pump air from the compressor into the upper one. The antifreeze that was in the stove will drain into the bottle.

Further work is done from inside the car. Use a T20 screwdriver to unscrew the self-tapping screw holding the side plastic panel on the driver's side. The plastic clip is removed from the carpet near the gas pedal. As a result, access to the lower mounting bolts of the panel amplifier bracket is opened.

The bolts are removed with a 13-mm wrench. Using a special tool, the clip holding the wiring harness to the bracket is carefully removed. Using pliers or another tool, another clip is pressed in, which holds the harness on the inside of the bracket.

All harnesses and devices attached to it are removed from the bracket. Often an alarm unit is attached to it. In the upper part, use a T20 screwdriver to unscrew the fixing screw. The connector from the speaker is immediately removed, which can be left on the amplifier. To do this, you need to click on a special flag and the connector is easily released.

Next, the two upper nuts holding the bracket are unscrewed. To do this, you will need an extended 13 socket with a ratchet, and the lever must be short, since the space for manipulation is very limited.

When releasing the bracket, keep in mind that there may be several harnesses attached to it, which you need to be aware of when moving it to the side. It does not need to be completely released, just pushed aside to make room for removing the heater core.

The heater radiator opens in the opened space. To remove it, unscrew the radiator mounting screw and the screw holding the bracket securing the pipes. To do this you will need a T20 screwdriver. After a slight rocking, the pipes are quite simply removed from the radiator and moved slightly to the side.

According to the instructions, to remove the stove radiator, you need to completely disassemble the panel, after which you can dismantle it. But there is another, simpler way. To do this, you need to carefully trim the part of the panel that is not visible from the outside and does not bear any power load. Then, bending the corner, carefully remove the radiator. This saves time and avoids the risk of damaging the panel. In this case, the cut part will not be visible and will not have any effect on the operation of the car.

Installing a new radiator is done in the reverse order; be sure to change the gaskets on the pipes to avoid leaks in the future. After replacement, you need to start the engine, turn on the heater, make sure there are no leaks, and add antifreeze to the required level. After the engine has warmed up, the heater should heat well at idle.

Reasons for replacing heating radiators in Renault Logan

There may be two reasons why a car owner will need to change the heating radiator:

• The heater core is leaking;
• The heater core is clogged.

Leaks in heating radiators are caused by mechanical damage or corrosion. Most often, a leak occurs where the heat exchanger pipes are welded to the radiator tank. But if the radiator is subjected to very strong and prolonged shock or vibration, cracks may occur in this device.

Leaks in Renault Logan heating radiators occur as a result of mechanical damage and strong vibrations

Clogged radiator ducts are the second reason to replace the radiator. It takes a lot of time for these channels to become clogged with dirt to the point of complete blockage, and this malfunction can only be identified by elimination. If all components of the heating system are in good working order, but the stove still does not heat up, the problem is a clogged radiator, which is time to replace.

If the Renault Logan radiator is clogged, it is almost impossible to flush it

Choosing a new radiator

Despite the abundance of analogues offered on the market, it is advisable to use radiators manufactured by Valeo for replacement. The country of manufacture is completely unimportant; both French and Russian spare parts are of equally high quality.

There are several reasons why it is recommended to install Valeo products. This is due to the fact that this unit was developed for Renault vehicles, taking into account all their design features, so it has optimal technical parameters.

In addition, tests have shown that all similar radiators have significantly lower heat transfer, especially at idle. In Valeo products, the tubes through which the coolant passes are equipped with turbulators. These are spirals located inside the tube that mix the coolant, as a result of which it transfers heat better. Analogues do not have turbulators or they are located only in one tube. At the same time, the laminar flow of antifreeze releases heat only from the outer layer, which is not enough at idle, so the car is not warm enough.

Choosing a radiator for the stove

The details are quite simple, so you don’t have to waste energy, nerves and time looking through dozens of models. The easiest way is to buy a branded factory radiator, which, in the absence of unforeseen circumstances, will work until you buy a new car. The product has catalog number 6001547484. The cost is approximately 5,000 rubles. The main advantage is the quality of the brand, the presence of new connecting rings and guaranteed compatibility with the design of the machine.

There are dozens of alternative models on the market, both cheaper and more expensive than factory products. This list includes:

• FPS 56N83;
• ASAM SA 30910;
• THERMOTEC D6R016TT;
• PROFIT 17600085;
• LUZAR LRH0998;
• MAGNETS MARELLI BRK 278.

You will have to check the processing yourself. Be sure to read the reviews of other car owners on specialized forums before purchasing. When purchasing an analogue, the main thing is to make sure that it clearly corresponds to the dimensions of the original spare part. Also pay attention to its characteristics: the number, strength of the plates and the density of their installation, the presence of additional turbulence, and the location of the valves. Round tube models are less efficient than flat tube models.

One of the main parameters when choosing such products is the material. Previously, almost all radiators were copper, but today they are being actively replaced by aluminum heat exchangers. Copper models are easy to repair, but they are among the most expensive in terms of price. Aluminum, in turn, is lighter, stronger and cheaper, but repairing holes in such a radiator is extremely problematic.

High-quality products always have a large number of plates that fit perfectly together. In budget models, honeycombs can be folded literally by hand. Of course, deformation will worsen the heat transfer of the system, so we do not recommend saving on a radiator for the stove, especially if high-quality heating of the interior is required in winter.

Location of the heater radiator in Renault Logan

The heater (heater) of Renault Logan is located in the front, in the center of the cabin, under the instrument panel. The radiator is located inside the heater at the bottom, but it can only be seen after removing the decorative plastic shell.

Autonomous heater Renault-Logan

The diagram shows the main elements of a Renault car heater, the location of which should be known to every driver:

1. Distribution block.
2. Radiator.
3. Heater pipe.
4. Interior fan resistor.
5. Front left air duct for heating the footwell.
6. Air recirculation control cable.
7. Air distribution control cable.
8. Air temperature control cable.

Causes of failure

There are three main reasons why a radiator can fail. The first and simplest is elementary pollution. The ridges regularly become clogged with dust and small debris. This results in less heat generation. The simplest solution to the problem is to clean the radiator. You can use a regular stream of water. If you want better results, resort to chemical compounds. The main thing is that they do not destroy the metal from which the radiator itself is made. Of course, for best cleaning, it is recommended to completely disassemble the device.

The second problem is clogged channels. If you use low-quality coolant or a composition not recommended by the manufacturer, various deposits will appear on the walls. You can get rid of blockages using special cleaning products. However, the blocks can be so large that in some situations replacing the Renault Logan air conditioner radiator or stove radiator will be easier and more profitable.

The third and most dangerous malfunction is cracks, tears and other types of damage. Many auto repair shops offer repair services. Small holes can indeed be repaired, although the quality of the work is important. But to fully guarantee performance, it is recommended to purchase a new radiator and replace the damaged one.

Diagnosis of heater radiator malfunction

Replacing the heater radiator may be necessary in two main cases:

• radiator leak. Signs of a leak are the appearance of antifreeze on the carpet in front (under the feet of the driver and passenger), as well as a drop in the coolant level in the expansion tank;
• ineffective operation of the radiator due to clogging. In this case, with the engine warmed up to operating temperature, the stove warms up weakly, the air flow from it becomes hot only at high engine speeds.

If you identify these malfunctions, you should not be upset; you can do the work of replacing the stove radiator yourself in the garage.

Signs of problems with the stove radiator

Experience shows that there are two main signs of a malfunctioning heater core:

1. In any operating mode of the stove, cold air blows out of it. This is often caused by the radiator becoming clogged with particulate matter such as reservoir tank debris and other debris. This problem can also be caused by other breakdowns, so you need to figure out why coolant is not flowing into the radiator.
2. Antifreeze leaks into the interior through cracks in the radiator, which is accompanied by a characteristic odor and means damage to the radiator or supply pipes. In any case, you will need to install a new stove radiator.

The fumes from ethylene glycol, which is the basis for any antifreeze, are toxic, so at the first sign of a radiator leak, the problem must be addressed immediately.

When replacement is needed

This part is not included in the list of consumables, so the car manufacturer does not impose requirements regarding the frequency of replacement. From a technical point of view, the radiator is designed for the entire life of the car. The only reason it might need replacement is if the heater is faulty or has some other symptom.

Several signs indicate a breakdown of the heater core:

• Fogging of glass. If the windows in your car sweat regularly and heavily, it is possible that very hot coolant has entered the cabin, which has led to the formation of a large amount of condensation.
• The appearance of a sweet fruity smell in the cabin, most often melon. It's the smell of coolant. If it leaks, there will be a corresponding aroma in the cabin. Usually the leak can be found under the car itself, even if it is relatively small.
• Reduced coolant level. Wherever the leak occurs will affect the amount of coolant, so be sure to check your coolant levels regularly.
• Noticeable reduction in oven efficiency. If, in relatively low frosts, the furnace does not heat from the inside, it is time to diagnose, prevent or repair the system.
• Motor overheating. An indirect sign indicating low efficiency of the cooling system, which in turn is not able to completely cool the internal combustion engine due to damage to the heating radiator.

In most cases, these signs are sufficient for general diagnosis. A final conclusion can be made only after a visual inspection and a leak test. We'll talk about this further.

Sources

• https://pol-z.ru/zamena-radiatora-pechki-reno-logan/
• https://gyroscooter-izhevsk.ru/tormoza/zamena-radiatora-pechki-reno-logan.html
• https://drive2.su/lajvxaki/reno-logan-zamena-radiatora-otopitelya
• https://umelyeruki.info/avto/zamena-radiatora-otopitelya-na-reno-logan/
• https://rulikoleso.ru/remont-renault/zamena-radiatora-pechki-renault-logan
• https://k-SportRacing.ru/neispravnosti-i-remont/zamena-radiatora-pechki-na-logane.html
• https://razborov.net/renault/reno-logan-zamena-radiatora-otopitelya.html

Replacing the radiator and heater fan Renault Logan

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