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Citroen C3 Key Fob Replacement If your C3 key fob suddenly stopped functioning it could be because of a faulty module. If the key fob still works, it could be because of another issue, such as water damage or a dead battery. Citroen intends to cater to the mass market with its eC3. It provides a variety of services, like remote diagnostics that can be performed remotely and a specialized customer service app. Dead coin battery If the key fob's unlock button isn't functioning, there could be a problem with the coin battery. Battery life should be between three and four years with regular usage. However, it can abruptly die. Fortunately, automakers include fail-safes in their products so that you can still start and lock your vehicle even if the key fob has a dead battery. The battery in a key fob is usually secured by metal clips for retaining that complete the circuit. If they are worn out or dirty, the battery might not be able to receive electricity. Also, the battery needs to be of the correct size and type. The battery won't fit in the fob if it's too large or too small. Key fob batteries are sold under a variety of names including CR2016 and CR2032. These are not interchangeable. The best way to determine which one to buy is to check the manual of your owner or look at the fob for an inscription that contains the specific details. Once you've found the correct battery and it's replaced, it's possible to replace it in a matter minutes. Most fobs have a slider gap, or switch that can be used to pry open the cover to swap out the old battery for the new one. Make sure the new one is of the same voltage and is inserted in the correct direction. Water damage Even the case that your key fob escaped the wash cycle or swimming in the pool, water isn't suitable for electronics. It can destroy batteries and cause significant damage to the electronic chip inside. There are some things that you can do to prevent the damage. First, it's important to get rid of the battery and dry the interior and circuit board as much as is possible. You can also clean the battery by using a cotton swab that has been dipped in 90 percent alcohol. After you've cleaned your key fob, you should wait several days for it to completely dry. You can speed up the process by placing it on a shelf that isn't disturbed. Once you are sure that the battery is totally dry, replace it with the new battery and use it in the same way as before. If your key fob not working it could be because the receiver module in your car is defective and is not able to transmit signals. This can be quite expensive to repair, but it's worth trying if you want to avoid having to buy a new one. The easiest method to fix a damaged key fob is to change the battery. Change the battery will restore the radio signal and make your key fob function again. If the problem continues, you should seek professional assistance. Faulty receiver module In certain cases, a defect in the receiver module of the key fob may hinder it from receiving or transmitting the right signals. In this case the car will not recognize the remote control key. It won't unlock or start. In this scenario, you'll need to get a replacement. Consult your owner's guide before attempting to reprogram the key fob yourself. Make sure that the battery of the key fob is in good shape and that all buttons are functioning. Close the doors and take out any accessories, such as radios or alarms from the vehicle. You can also try cleaning the chip with isopropyl alcohol or electronic cleaner. If the chip is fried, you will need to replace it. After cleaning the key fob, take it off the circuit board. Then use alcohol swabs to clean the contacts and let them air dry. When the contacts are dry then you can reassemble the key fob and test it. If it's still not working you may have to replace the battery. Make sure you choose an alternative battery that is able to provide the same voltage as the old one. Make citroen c4 key fob TheKeyLab to check the battery's position, as the contact points are extremely sensitive. Keyless entry systems with malfunctions It can be quite frustrating if the key fob stops functioning. The positive side is that most times it's a breeze to get it back up and running. A dead battery in the coin slot is the most common reason for a broken fob. This can be easily replaced within minutes. Other causes are signal interference or a damaged module, and other electrical problems. The first thing to do is to make sure that the battery is of the correct voltage and is properly placed. It is also essential to select the right battery type. The internal circuitry of the device may be damaged when you use an unsuitable battery. the proper size or polarized. Examine the fuses to determine if they are damaged or if they have melt. Another possible problem is that the transponder within the key might have been damaged or lost. This is a problem that will require further diagnosis by a car dealer or professional mechanic. Many auto locksmiths and dealerships can reprogram a car's key fob at a cost, but this can be expensive. If you have an extra, it could be worthwhile to try reprogramming the fob yourself. You will usually find the instructions in the owner's manual. If you don't have a manual, you can look up instructions online or on YouTube. Before attempting to repair the key fob, it is important that you consult the owner's guide.