Electric windows that no longer work are a very common electrical problem, with the driver’s door in particular often suffering from faults due to defective switches or wiring. These window failures are often caused by moisture, corrosion or wear of the electrical components and cables in the door. Fortunately, with a few targeted checks and repairs you can often get back on the road quickly.
Why have the electric windows stopped working?
There are several causes for electric windows failing. A blown fuse blocks the power supply to the motor and means the window does not respond at all. You can quickly check this by opening the fuse box and seeing whether the relevant fuse is still intact.
Another frequent cause is a defective regulator, where the steel cable snaps or wears out. You often hear this as grinding noises or notice that a window suddenly drops down. The window guides can also wear, stopping the glass from moving smoothly. Cleaning and lubricating them with WD-40 often already helps.
The window switch itself is vulnerable to moisture and corrosion, especially when owners regularly drive in the rain with the windows open. Moisture enters through the door and attacks the electrical contacts. In some cases the motor can also fail due to overload or moisture ingress, often recognisable by the complete absence of any sound when operating the switch.
‘ Moisture collects in the door foam and causes corrosion to the electrical connections there. ’
Common problem with the Seat Alhambra
Seat Alhambra owners regularly report problems with several windows failing at the same time. This often points to a fault in the wiring loom running through the door or to learning errors after the battery has been replaced. Moisture collects in the door foam and causes corrosion to the electrical connections there.
A specific issue with this model is that regulator faults occur frequently. The regulator is responsible for the mechanical movement of the window and fails over time due to wear of the steel cable or the gears. The driver’s door is particularly prone to this because that window is used the most.
After replacing the battery it may be necessary to re-teach the windows. If this procedure is not carried out, the automatic functions will no longer work properly. This explains why some owners suddenly experience problems after scheduled work on the car.
Costs of repairing electric window controls
Replacing a window switch is often the most logical first step in the case of corrosion or moisture problems. The switch itself usually costs between €20 and €60, depending on the make and model. For labour, a garage charges around €50 to €100.
When the problem lies deeper and the regulator has to be replaced, costs increase. A new regulator costs between €80 and €200, plus labour costs of €100 to €150. The price depends on the complexity of the door and how easy the parts are to access.
If the motor is defective, you should allow roughly €100 to €150 for the part and another €80 to €120 for fitting. In total, a complete repair of an electric window can therefore add up to between €250 and €350, depending on exactly what needs to be replaced.
Diagnosing electric window problems yourself
You can track down many window problems yourself with a few simple checks. Start by checking the fuse in the fuse box. If it is blown, replace it and test whether the window works again. This will take you no more than five minutes.
A second step is to carry out the learning procedure, especially after a battery change. Switch on the ignition without starting the engine. Fully open the window and release the switch. Then fully close the window and repeat this for each door. This procedure resets the automatic functions and resolves many faults.
If these steps do not produce any results, you can inspect the wiring loom by removing the door panel. Look for signs of broken cables or corrosion at the connection points. The left-hand door is often the first affected because that window is operated the most. If you hear a grinding noise or the window suddenly drops down, this points to a defective regulator.
‘ Prevention is simple: keep the windows closed in the rain and check the guides annually for wear. ’
Problems caused by moisture and prevention
Moisture is the biggest enemy of electric windows. Water penetrates through openings in the door into the door foam and reaches the electrical components. This leads to corrosion of switches, cables and connectors, interrupting the power supply.
Owners report that drying the door with a hairdryer often already has an effect. Remove the door panel and thoroughly dry the electrical components and the foam. Some people carefully cut the door foam open to reach damp spots more easily, but only do this after you have first tried to dry everything.
Prevention is simple: keep the windows closed in the rain and check the guides annually for wear. Lightly lubricate the guides with WD-40 to keep them operating smoothly. In winter you should not force a window that has frozen shut, as this can damage the motor and regulator.
DIY repair of defective components
For those who are reasonably handy, many window repairs can be carried out yourself. For a simple check you need about 15 minutes. Disconnect the battery for safety and remove the door panel with a screwdriver. Check the motor, switch and fuse for visible damage.
Replacing a switch is relatively simple. Remove the old switch from the panel, unplug the connector and fit the new switch in the same way. Test immediately whether the window responds before refitting the panel.
Replacing a regulator requires a bit more technical insight. You will need a screwdriver, pliers and possibly a hammer. Remove the old regulator by undoing the mounting bolts and disconnecting the motor. Fit the new regulator and make sure all cables are firmly secured. For replacing a motor it is better to call in a professional, as this is often more difficult to access.
Owners’ experiences with window failures
Many owners state that moisture problems arise after driving with the windows open in the rain. The electrical components are then gradually affected by corrosion, which ultimately leads to total failure of one or more windows. After dismantling and drying the door, the windows work normally again in many cases.
The learning procedure after a battery replacement is estimated to solve 80 percent of battery-related problems. Owners who skip this step often think there is a mechanical defect, while the issue is purely electronic in nature.
Replacing the regulator turns out to be a relatively inexpensive and effective solution that prevents recurrence. Owners advise, if in doubt, to replace the regulator first before tackling other, more expensive parts. This saves time and money when tracking down the real cause.
‘ The wrong intervention can lead to further damage to the car’s electronics. ’
When should you go to a garage?
If simple checks such as inspecting the fuse and carrying out the learning procedure do not produce any results, professional help is advisable. A garage has the right measuring equipment to trace electrical faults in the wiring loom or motor.
With complex problems such as short circuits in the central locking electronics or failure of several electrical systems at the same time, DIY repair is risky. The wrong intervention can lead to further damage to the car’s electronics.
Also, if you are unsure about your own technical skills, it is better to call in a professional. Dismantling a door panel may look simple, but without experience you can easily damage clips or other fixings. A mechanic has the experience to do this quickly and without causing damage.
On the Carnews website you can find more useful information about car problems, maintenance tips and experiences with different makes and models. Discover which problems occur more frequently with your car and how best to tackle them.
Frequently asked questions
Start by switching on the ignition and operating the window switch: if you hear absolutely nothing, first check the fuse and, if necessary, the power supply at the door connector. If you can hear the motor whirring but the window does not move or moves jerkily, the window mechanism/regulator is probably worn or blocked (check and lubricate the guides). If the window sometimes responds and sometimes doesn’t, or only works from one switch (for example door vs centre console), the switch itself or the wiring around the switch is usually corroded. If everything stays dead on several windows at once, check the wiring loom in the door, the earth connections and, if applicable, carry out a learning/reset procedure for the windows.
To replace a defective window switch yourself, first disconnect the battery, then remove the door panel (undo screws and clips, carefully lever off the trim) and then unplug the connector from the old switch so you can unclip or unscrew it from the panel. Next, fit the new switch (clip or screw it in place), reconnect the plug, refit the door panel and reconnect the battery to test that it works. Make sure you carry out a learning procedure for the electric windows (fully open and close each window) if that is required for your car. In most cases this is a realistic job for a handy enthusiast with basic tools and a bit of patience.
Keep the windows closed as much as possible in the rain and in car washes to prevent moisture and corrosion in switches and connectors. Clean and lightly lubricate the window guides and moving parts once a year (for example with a suitable spray) so the window continues to run smoothly and the motor is less stressed. Do not use the electric windows to free frozen panes in winter, but first remove the ice so the regulator and cables are not overloaded. After disconnecting or replacing the battery, carry out the learning/reset procedure for the windows to avoid unnecessary faults.
The average costs of having electric windows repaired are roughly between €150 and €400 per window, depending on the part (switch, motor or window mechanism) and the labour time. A simple repair such as replacing a switch is usually at the lower end of this range, while replacement of the complete window mechanism or motor is more expensive. Factors that influence the price include the type and make of car, the price of parts (original vs aftermarket), the labour hours required and the garage’s hourly rate. Any additional problems such as corrosion in the wiring loom or door module can also increase the costs.
There are no clear indications that electric window defects occur specifically more often on sports cars or classics than on other cars. The usual problems (such as defective window regulators, switches, motors or wiring looms, often due to wear or moisture) occur across all segments. However, age and operating conditions (for example parked outside more often or used more intensively) in classics or sports cars can increase the likelihood of faults, but that is not unique to these categories.