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Citroen C3 Key Fob Replacement If your C3's keypad stopped completely it could be due a defective receiver module. If the key fob operates, it could be because of other issues, such as water damage or a dead battery. The eC3 is aimed at the mass market, and Citroen has worked to make service easier for customers. It comes with a variety of options, including remote diagnostics via virtual technology and a dedicated customer support application. Dead coin battery If the key fob's unlock button doesn't working, there may be an issue with the coin battery. Battery life should be between three and four year with regular use. However, it can suddenly stop working. The automakers have created fail-safes that allow you to start and lock the car even if your key fob is dead. The battery inside the key fob is held in place with metal clips that complete a circuit. The battery may not be powered if these clips are dirty or worn. The battery also needs to be the correct size and type. If the battery is not big enough or large it won't fit into the fob and won't work properly. Key fob batteries are sold under various names like CR2016 or CR2032. They cannot be interchanged. Check out the owner's manual or look for a label on the fob which contains the details. Once you have the right battery, you can swap it in a few minutes. Most fobs have the option of a slider, switch or a gap. These can be used to pry the cover off and replace the battery that was used. Make sure the new battery is the same voltage and is inserted in the correct direction. Water damage Even even if your key-fob has survived the wash cycle or a dip in the pool, water is not ideal for electronics. It can damage a battery and cause serious damage to the electronic chip inside. There are a few things you can do to reduce damage. It's crucial to first eliminate the battery and then dry the inside as much as you can. You can also clean the battery using a cotton swab that has been dipped into 90-percent alcohol. After cleaning the key fob you should let it dry for several days. You can speed up the process by placing it on a shelf that won't be disturbed. Once you're certain that the battery is totally dry, put in an additional battery and continue using it as normal. If your key fob is not working, it could be that the receiver module in your car is damaged and is unable to transmit signals. This could be expensive to repair, but it's worth trying if you want to avoid the expense of a replacement. The easiest method to fix a damaged key fob, is to replace the battery. Removing the battery can restore the radio signal and make the key fob work once more. If the problem continues, you should seek assistance from a professional. Faulty receiver module In some instances the key fob's reception module may have a defect that hinders it from receiving and transmitting the proper signal. In this situation the car will not recognize the remote control key. It won't unlock or start. In this instance you'll need a new one. Consult your owner's guide before attempting to modify the key fob by yourself. Ensure that the battery of the key fob is in good shape and that all buttons function. You should also close the doors and remove any other aftermarket devices, such as alarm systems or radios from the vehicle. citroen c1 key replacement may also try cleaning the chip with isopropyl Alcohol or electronic cleaner. If the chip is in a state of disintegration it will likely need to be replaced. After cleaning the key fobs, remove the circuit board. Then use alcohol swabs to clean the contacts and let them air dry. Once the contacts have dried then you can reassemble and test the key fob. If the key fob still isn't working, it may be required to replace the battery. Make sure you use a new battery that provides the same voltage as your old one. Make sure to check the battery's position, because the contact points are extremely sensitive. Faulty keyless entry system It can be frustrating if the key fob stops functioning. It's generally easy to get your key fob running. A dead battery in the coin slot is the most common reason for a malfunctioning fob. This can be easily repaired in just a few minutes. Other causes are signal interference, malfunctioning receiver modules, and other electrical problems. The first step is to make sure that the battery is of the correct voltage and is properly installed. It is also important to select the correct battery type. If you use a battery that is not properly sized or polarized battery can damage the internal circuitry. You can also check the fuses to ensure they aren't blown out or have not melted. A transponder that is inside the key may be damaged or not functioning properly. This issue requires further investigation by a qualified mechanic or dealer in cars. Auto locksmiths and dealerships can reprogram the key fob of vehicles for a small fee. However this can be expensive. It may be worth it to reprogram your spare fob, if you have one. In most cases, you can find the instructions in your owner's guide. If you don't have the manual, you can find instructions online or on YouTube. Before attempting to repair the key fob, it's essential to read the owner's manual.