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Citroen C3 Key Fob Replacement If your C3's key fob stopped functioning suddenly it could be due a defective receiver module. If the key fob is still functional, the issue could be caused by something else, like water damage or a dead battery for the coin. The eC3 is aiming at the mass market and Citroen has worked on making service easy for customers. It offers several features including virtual remote diagnosis as well as a dedicated app for customer service. Dead coin battery If the key fob's unlock button isn't working, there may be a problem with the coin battery. Battery life should range between three and four year with regular use. However, it is possible for it to suddenly stop working. Luckily, car makers include fail-safes in their products so that you are able to lock and start your vehicle even if the key fob is dead battery. The battery inside the key fob is secured by clips made of metal that form the circuit. The battery may not be powered if these clips are worn or dirty. The battery must also be of the correct size and type. If the battery is too small or too large, it won't fit into the fob and will not function properly. Key fob batteries are usually sold under different names, such as CR2016 and CR2032 (though these are not interchangeable). Read the owner's guide for your particular model or look for a sticker on the fob that contains the details. Once you've found the correct battery, it can be replaced in a matter of seconds. The majority of fobs have either a slider or switch or a gap that can be used to open the cover off and replace the old battery. Make sure the new battery is of the same voltage as the older one and is properly inserted. Water damage Even if your key fob survived the wash cycle or taking a dip in the pool, it isn't ideal for electronics. It can harm the chip and damage a battery. There are some things that you can do to limit the risk of damage. It is important to first take out the battery, then dry out the interior as possible. You can also employ a cotton swab coated in 90 percent isopropyl ethanol to clean the battery and circuit board. After cleaning the key fob you need to let it dry for a few days. You can speed it by placing it on a shelf, so it will not be disturbed. Once you're sure that it's dry, try replacing the battery and using it as normal. If your key fob still not working, it could be that the receiver module in your car is damaged and is unable to transmit signals. citroen berlingo van key replacement thekeylab.co.uk to fix, but is worth it if you don't wish to replace your vehicle. The most effective way to fix an faulty key fob, is to replace the battery. The radio signal should be restored and your key fob will work again after changing the battery. If the issue continues, you should seek assistance from a professional. Faulty receiver module In some cases an issue with the receiver module of the key fob might hinder it from receiving or transmitting the proper signals. If this is the situation, your car will not recognize your remote control and will not allow you to unlock or start the engine. In this instance the replacement remote control will be needed. The steps needed to reprogram a key fob vary by model and make So, make sure to consult the owner's manual before trying to do it yourself. The first step is to ensure that the battery in the key fob is in good shape and that all of its buttons are functioning. Also, close the doors and disconnect any accessories like radios or alarm systems from the vehicle. You can also clean the chip with isopropyl or electronic cleaner. If the chip has been fried, you will have to replace it. After cleaning the key fob, you can remove the circuit board. Then apply alcohol swabs clean the contacts and let them air dry. Once the contacts have dried, you can put them back together and test the key fob. If it's not working you may have to replace the battery. Choose a new battery that has the same voltage level as the old battery. It is recommended to ensure that the battery is placed in the correct position because the contact points are very sensitive. Keyless entry systems that aren't working properly It can be quite frustrating If the key fob ceases working. It's typically easy to get your key fob working. A dead battery in the coin slot is the most common reason for a broken fob. It can be replaced within minutes. Other causes are signal interference, malfunctioning receiver modules, and other electrical problems. The first thing to do is to make sure that the battery has the correct voltage and that it is correctly placed. It is also important to select the right battery type. Using an incorrectly sized or polarized batteries could harm the internal circuitry. You should also examine the fuses to make sure they are not blown or haven't melted. A transponder inside the key may be damaged or missing. This problem will require further diagnosis by a professional mechanic or car dealer. Auto locksmiths and dealerships can reprogram the fob of the key in a vehicle for a fee. However this can be costly. It might be worth it to reprogram your spare fob, if you have one. You can usually find instructions in the owner's manual. If you don't own the manual, you can find instructions on the internet or on YouTube. Before you attempt to repair the key fob, it's essential to read the owner's guide.