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Citroen C3 Key Fob Replacement If your C3's keypad stopped functioning suddenly, it could be due to a defective receiver module. If the key fob is functional, the issue could be due to something else, like water damage or a dead battery for the coin. The eC3 is aimed at the mass market, so Citroen has worked to make the service accessible to customers. It has many features like virtual remote diagnosis and an app that is specifically designed for customer service. Dead coin battery If the unlock button on the key fob does not work, it may be that the battery in the coin is not working properly. The battery is expected to last between three and four years with regular use however, it could die suddenly. The car makers have developed fail-safes that permit you to start and lock the car even if the key fob is dead. The battery inside the key fob is secured with clips made of metal, which complete an electrical circuit. If these are worn or dirty, the battery will not be able to receive electricity. The battery should be the correct size and type. The battery won't fit into the fob if it is too big or too small. Batteries for key fobs are available under various names including CR2016 and CR2032. They cannot be interchanged. Refer to the owner's manual for your model or look for a label on the fob that contains the information. Once you've got the right battery, it can be replaced in a matter of seconds. Most fobs come with either a slider or switch, or a gap that can be used to pry the cover off and replace the old battery. Make sure the new battery is the same size and voltage, and is inserted in the correct way. Water damage Water can be harmful to electronics even if they've been through an wash cycle or dip. It can damage batteries and cause serious damage to the electronic chip inside. Fortunately, there are a few ways to minimize the damage. First, it's important to get rid of the battery and dry out the inside and circuit board as much as you can. You can also use a cotton swab dipped in 90-percent isopropyl alcohol to clean the battery and the circuit board. After cleaning the key fob it is recommended to dry it for several days. You can speed up the process by placing it on a shelf that won't be disturbed. Once you are sure that the battery is dry, put in a new one and use it in the same way as before. If the key fob does not work, you might have a faulty receiver module that's not able to send signals to your vehicle. This could be expensive to repair, but it's well worth trying to avoid the expense of a replacement. The most straightforward way to fix a damaged key fob is to replace the battery. The radio signal should be restored and your key fob will be operational again after changing the battery. If citroen berlingo replacement key cost persists then you should seek out assistance from a professional. Faulty receiver module In some cases the key fob's reception module could be defective that hinders it from receiving and transmitting the correct signal. If this is the situation, your car will not recognize your remote control key and will not unlock or start the engine. In this scenario the replacement remote control is required. Check out the owner's guide prior to trying to program the key fob yourself. Check that the battery on the key fob is in good shape and that all buttons work. You should also close the doors and disconnect any accessories like radios or alarm systems from the vehicle. You can also try cleaning the chip using isopropyl alcohol, or an electronic cleaner. If the chip has become damaged, you'll need to replace it. Once you've cleaned the key fob, take it off its circuit board. Then, clean the contacts with alcohol swabs and allow them to dry. Once the contacts are dry, you can reassemble the key fob and test it. If the key fob does not work, it may be required to replace the battery. Make sure you choose a battery with the same voltage as the old battery. It's also a good idea to ensure that the battery is placed in the correct position in the first place, since the contact points can be extremely sensitive. Keyless entry system malfunctions It can be a hassle If the key fob ceases functioning. The good news is that most times it's a breeze to get it back up and running. A dead battery for the coin is the most common reason for a malfunctioning fob. This can be easily repaired in just a few minutes. Other causes include signal interference, a bad receiver module or other electrical issues. The first thing to do is to ensure that the battery is running at the correct voltage and that it is correctly placed. The correct type of battery is also essential. The internal circuitry of the device may be damaged when you use the wrong battery, or one that isn't the correct size or the correct polarized. You should also examine the fuses to ensure they're not blowing or have not melted. A transponder that is inside the key may be damaged or not functioning properly. This issue requires further testing by a dealer in the car or professional mechanic. Auto locksmiths and dealerships can reprogram the key fobs of vehicles for a small fee. However, this can be costly. If you have an extra, it could be worthwhile to try reprogramming the fob yourself. The instructions are usually found in the owner's manual. If you don't own the manual, you can find instructions online or on YouTube. It is important to consult the owner's guide before making any repairs on the key fob.