Roller shutter that lowers by itself, what to do?

Your shutter goes down a few centimeters or all its length without you having asked for it? Whether on a manual or electric roller shutter, this problem is not to be taken lightly since it means that a part is giving up the ghost. So, in this article, discover why a roller shutter lowers by itself and how to try diagnose the fault for so the réparer effectively.

Why does your roller shutter go down by itself?

A roller shutter that lowers by itself is a sign that a mechanical or electrical component is tired or broken. However, the components at risk are different if it is a roller shutter electric ou manuel. Indeed, the shutter descent blocking mechanism is not similar on these two types of shutter:

Causes on an electric roller shutter

When you press the Stop button on your remote control or wall control, the roller shutter does not stop and starts to go down a few centimeters or entirely? Several causes can be at the origin of this:

  • Wrong settings or deprogramming of limit switches
  • Apron clips failing
  • System of Engine brake (or electric brake) tired or out of order

The electric shutter is more likely than the manual shutter to encounter this problem of involuntary lowering because generally the failure comes from the motor brake, which the manual roller shutter does not have.

Before proceeding to more advanced manipulations that we will see in the second part of the article, try to replace the remote control battery (or the wall control if it uses batteries) to make sure that the problem is not there.

Note: Some solar electric shutters have a piloted mode. This feature allows your shutters to lower and raise on their own to optimize the comfort of your home. For example, in extreme temperatures, the shutter closes for better insulation. If your shutter lowers on its own irregularly, and not necessarily when you press the control buttons, this mode may be engaged. Refer to the manual or product sheet for your shutter model to check whether your shutter has this mode, and if so, how to deactivate it. 

Causes on a manual roller shutter

Un manual roller shutter that lowers by itself is a rarer fact since the winding mechanism is purely mechanical and relatively strong. However, it could happen that an element loosens and then creates the problem you are having. It can be the apron, spring or winch attachments.

Unfortunately, in most cases, it will usually be necessary to replace the entire mechanism to find a functional component. Anyway, you will have to open the trunk to observe the mechanism and try to identify the failure.

Read also: Rolling shutter squeaking, what to do? 

How to fix a roller shutter that goes down by itself?

To repair a roller shutter that goes down without your asking, you will most certainly need to replace a part of the winding mechanism present inside the trunk. Of the electrical skills are therefore necessary to avoid irreversible damage to the shutter, but also any risk of cuts or electric shock. Think forever cut off the power before changing a part or carrying out any operation concerning the elements inside the roller shutter box. If you are not a handyman, call on a professional of the sector.

Roller shutter that lowers by itself, what to do?

The first thing to do is to try toidentify the cause of the failure. So, follow our troubleshooting guide in order, going from the simplest to the most complex diagnoses and solutions.

Important: If your roller shutter is still under guarantee (which can go from 1 year and extend up to 10 years!), immediately call the after-sales service of the company that installed the shutter or of the brand of the shutter manufacturer. You should get a technician to fix the problem at no cost. Do not disassemble the shutter, as you risk losing your warranty rights. 

Perform an electrical reset

When the roller shutter that lowers by itself is electric, first try to carry out an electrical reset. This makes it possible to eliminate any bugs and errors recorded in the electrical programming of the shutter, and thus to readjust the mechanism of the shutter.

To electrically reset an electrical or electronic device, it's simple, you just need to cut off power for 30 minutes. In the case of a roller shutter, cut off the power supply to the room in which it is located via the electrical panel in your home. Be careful to turn off and unplug other devices in the room to avoid potentially harmful voltage peaks for them. Once the XNUMX minutes have elapsed, restore the power and operate the shutter to see if the problem persists.

Note: If after the power cut, the shutter does not react, you must certainly reprogram the motor, the limit switches and/or the pairing with the shutter remote control. 

Check the apron fasteners of the roller shutter which lowers by itself

That the roller shutter that descends on its own either electric or manual, this manipulation concerns you. At this point, you will need open the trunk of the rolling shutter to be able to observe the rolling up and locking mechanism of the rolling shutter.

The operations to open a roller shutter box are different depending on the model. Video tutorials exist showing you the procedure. If your safe is built into the wall, you will need to call in a professional in the sector (carpenter).

Once the trunk is open, lower your shutter to the bottom (therefore in the closed position). Check that the upper blade is correctly attached to the apron clips and that the apron is therefore well secured to the winding tube. If not, fix them again. Then observe apron clips and stops. Make sure they are not not damaged or broken. If so, they will need to be replaced.

Adjust the limit switches of the electric shutter

Following a power outage or simply following an electrical bug, it may be that the limit switches are deprogrammed and that they are responsible for the fact that your electric roller shutter lowers by itself. In the case of this problem, you should hear the motor running normally, and the shutter should go down at normal speed (not all of a sudden like it is dropping).

In principle, the stops are programmed during assembly of the roller shutter. Then try to reset the engine (if the function exists on your model). Then reprogram the motor. Then proceed to limit switch settings. Generally, this manipulation is done via the two buttons located on the end of the motor. You can find the manipulations on the instructions for use corresponding to your model, on the site of the manufacturer of the shutter or, at worst, by contacting the assistance of the manufacturer.

If after resetting and reprogramming the roller shutter continues to lower by itself, the motor brake is probably faulty.

Replace the motor of an electric shutter

Unfortunately, most of the time when your electric roller shutter lowers on its own, this is a sign that the motor brake is tired. If the shutter falls violently, it means that it is completely dead. In any case, whether the shutter goes down a few centimetres, or all at once, sooner or later you will have to replace the motor to avoid damaging the curtain and ending up with a double penalty.

The engine brake is located inside the engine. As its name suggests, it is a brake which is actuated by a spring when the shutter is at rest to block the curtain.

The motors are designed so that it is not possible to change only the motor brake. You will then have to replace the entire motor. You will have to count between 100 euros and 350 euros for the purchase of a new engine that you install yourself. If you add labor, the bill can rise to more than 400 euros.

If you want to do it yourself, be sure to replace the faulty motor with a identical engine and original. Avoid counterfeits which can be dangerous for you and your roller shutter. Refer to internet articles and video tutorials to find out which motor to buy and to help you in the procedure of dismantling, reassembling and adjusting the new motor.

 Also remember to check if you have the right to guarantee (the guarantee of a motor is not always identical to that of the shutter. It can also range from 2 years to 10 years).

Check the winding mechanism of a manual roller shutter

When your manual roller shutter lowers by itself and the problem is not with the apron fasteners, then an element of the winding mechanism is definitely faulty. Several checks can then help you diagnose the origin of the failure.

First, after opening the chest, check that the apron rolls up correctly around the winding axis. Make sure the mechanism is working in the correct direction (over the top) and has not reversed.

Then check if the winch (or bevel gear) is in good condition. If it is damaged or broken, it must be replaced with an identical winch. Note that the brake of a manual roller shutter is usually integrated into the winch. However, the problem can also come from the compensation spring located in the tube. In this case, check if the spring is unhooked or broken. If this is the case, it will certainly be necessary to replace the drive mechanism in its entirety.

Note that there are many mechanisms with different specificities. This is why we advise you to approach a specialist store or a professional for a personalized solution (reference and type of shutter you have, configuration of your accommodation, etc.). He will be able to advise you on the best options available to you.

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