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Citroen C3 Key Fob Replacement If your C3 key fob suddenly stopped working, it could be due to malfunctioning components. If the key fob operates, it could be due to something else like water damage or a dead battery. The eC3 is targeting the mass market, so Citroen has worked to make service easy for customers. It offers several facilities like remote diagnostics that can be performed remotely and a dedicated customer support application. Dead coin battery If the key fob's unlock button isn't working, it could be a problem with the battery of the coin. The battery is expected to last between three and four years if used regularly however, it could die abruptly. Fortunately, automakers include fail-safes in their products so that you can unlock and start your car even if the key fob has a dead battery. The battery inside the key fob is secured by metal clips that form an electrical circuit. If they are worn out or dirty, the battery may not receive power. Also, the battery needs to be the correct size and type. If the battery is too small or too large it won't fit into the fob and won't perform as expected. Key fob batteries are typically sold under various names, such as CR2016 and CR2032 (though these are not interchangeable). Refer to the owner's manual for your model or look for a label on the fob which contains the information. If you've got the right battery, you can replace it in a few minutes. Most fobs have a slider, switch, or gap that you can use to break open the cover and swap out the old battery to get the new one. Make sure the new battery is of the same voltage and that it is placed in the correct direction. Water damage Even even if your key fob has survived the wash cycle or an immersion in the pool, it isn't suitable for electronics. It can damage a battery and cause serious damage to the electronic chip inside. Fortunately, there are a few actions you can take to limit the damage. It's crucial to first eliminate the battery, then dry the inside as possible. You can also clean the battery using a cotton swab which has been dipped into 90-percent alcohol. After you've cleaned your key fob, wait several days for it to completely dry out. You can accelerate the process by placing it on a shelf where it will not be disturbed. Once you're sure it's bone dry, try putting in a brand new battery and operating it as normal. If your key fob still not working, it could be that the receiver module in your car is faulty and cannot transmit signals. This can be quite expensive to repair, but it's worth trying to avoid having to buy a new one. The most straightforward way to fix an faulty key fob is to replace the battery. The radio signal should be restored and your key fob will function again after replacing the battery. If the issue continues, you should seek help from a professional. Faulty receiver module In some instances there may be a problem with the receiver module of the key fob might hinder it from receiving or transmitting the proper signals. If The Keylab is the situation, your car will not recognize your remote control key, and will not unlock or start the engine. In this instance you'll need a new one. Check out the owner's guide prior to attempting to reprogram the key fob yourself. Make sure the battery of the key fob is in good health and that all buttons are functioning. It is also recommended to shut the doors and disconnect any accessories like alarm systems or radios from the vehicle. You can also clean the chip with isopropyl or electronic cleaner. If the chip has been damaged, you'll need to replace it. Once you've cleaned and dried the key fob, remove its circuit board. Then, clean the contacts with alcohol swabs and let them dry. After the contacts have dried you can reassemble them and test the key fob. If the key fob still does not work, it could be necessary to replace the battery. Make sure you choose an alternative battery that is able to provide the same voltage as the older one. It is also a good idea to double-check that the battery is in place because the contact points can be extremely sensitive. Faulty keyless entry system It can be quite frustrating when the key fob stops working. The good news is that most of the time it's simple to get it working again. A dead battery in the coin slot is the most frequent reason for a fob that is malfunctioning. This can be easily repaired in just a few minutes. Other causes include signal interferance or a defective module, as well as other electrical issues. The first thing to do is to make sure that the battery has the correct voltage and that it is properly put in. The correct type of battery is also important. Using an incorrectly sized or polarized battery can damage the internal circuitry. Also, you should check the fuses to ensure they are not blown or melted. Another possibility is that the transponder inside the key could have been damaged or lost. This issue will require an examination by a professional mechanic or car dealer. A lot of auto locksmiths and dealerships can reprogram the car's key fob for a fee, however this can be expensive. If you have an extra key, it may be worth attempting to reprogram the fob yourself. In the majority of cases, you will get instructions from your owner's guide. If you don't have the manual, you can find instructions online or on YouTube. It is essential to read the owner's manual prior attempting any repairs on the key fob.