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Citroen C3 Key Fob Replacement If your C3 key fob suddenly stopped functioning, it could be because of malfunctioning components. If the key fob remains functional, the issue may be due to something else, like water damage or a dead battery for the coin. The eC3 is aiming at the mass market and hence Citroen has worked to make service simple for customers. It offers several features including virtual remote diagnosis as well as an app specifically designed for customer service. Dead coin battery If the unlock button on the key fob does not function, it could be that the battery for the coin is faulty. The battery should last between three and four years with regular use however, it could die unexpectedly. Fortunately, most car manufacturers have built-in fail-safes so that you are able to lock and start your vehicle even if your key fob is dead battery. The battery inside the key fob is normally held in place by metallic retaining clips that complete the circuit. If they are worn out or dirty, the battery might not be able to receive electricity. The battery must also be the right size and type. The battery will not fit in the fob if it is too large or too small. Batteries for key fobs are sold under many names, including CR2016 and even CR2032. They cannot be interchanged. The best way to know the type to buy is to consult the owner's manual or look at the fob to find the label that provides the exact information. When you've got the proper battery that you want to replace, it can be done in just a few moments. Most fobs have either a slider or switch or a gap which can be used to open the cover open to replace the battery that was used. Be sure that the new battery has the same voltage as the previous one and is properly inserted. Water damage Water is bad for electronics, even if they have survived an wash cycle or dip. It can damage a battery and cause serious damage to the electronic chip inside. There are some things that you can do to minimize the risk of damage. It's crucial to first eliminate the battery and then dry out the interior as much as you can. You can also clean the battery by using a cotton swab which is dipped in 90 percent alcohol. After you've cleaned your key fob, wait a few days for it to completely dry. It is possible to speed this process up by placing it on a shelf so it will not be disturbed. Once you're sure it's bone dry, try putting in a new battery and using it in the same way as you normally would. If your key fob still not working, it could be that the receiver module inside your car is malfunctioning and is not able to transmit signals. It can be expensive to repair, but worth it if you don't want to replace your car. The most straightforward way to fix a malfunctioning key fob is to change the battery. TheKeyLab will be restored and your key fob will be operational again after changing the battery. If the issue continues, you should seek help from a professional. A malfunctioning receiver module In some instances, the key fob's receiver module may have a defect that stops it from receiving and transmitting the correct signal. If this is the situation, your car will not recognize your remote control and will not be able to unlock or start the engine. In this instance the replacement remote control is required. The steps for reprogramming keys differ based on model and make So, make sure to consult the owner's manual prior to trying to do it yourself. Ensure that the battery of the key fob is in good working order and that all buttons are functioning. Also, shut the doors and disconnect any additional devices such as radios or alarm systems from the vehicle. You can also try cleaning the chip using isopropyl alcohol, or an electronic cleaner. If the chip is in a state of disintegration it is likely to be replaced. After cleaning the key fob, take it off the circuit board. Then use alcohol swabs to clean the contacts and let them air dry. Once the contacts are dry you can put them back together key fob and test it. If it still doesn't work you may have to replace the battery. Make sure you use an alternative battery that is able to provide the same voltage as the previous one. Make sure to check the battery's position, as the contact points of the battery are extremely sensitive. Keyless entry systems that fail It can be frustrating If the key fob ceases functioning. The positive side is that most of the time it's easy to get it back up and running. The most typical cause of a malfunctioning key fob is a dead battery for the coin that can be replaced in a matter of minutes. Other causes are signal interference, malfunctioning receiver modules and other electrical issues. The first thing to do is to make sure that the battery is running at the correct voltage and that it is correctly installed. The correct battery type is also crucial. Using a wrongly sized, or polarized battery could damage the internal circuitry. Check the fuses for damage or been melted. A transponder in the key could be damaged or missing. This problem will require further diagnosis by a professional mechanic or dealer in cars. Many auto locksmiths and dealerships can reprogram the key fob of a car for a fee, but it can be costly. If you have a spare, it could be worth attempting to reprogram the fob yourself. The instructions are usually found in the owner's manual. If you do not have the manual, you can look up instructions online or on YouTube. It is essential to read the owner's manual prior attempting any repairs on the key fob.