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Citroen C3 Key Fob Replacement If your C3's keypad stopped suddenly it could be due to a defective receiver module. If the key fob is working it could be because of other issues, such as water damage or a dead battery. Citroen is aiming to reach the market of mass appeal by offering eC3. It comes with a variety of options, like remote diagnostics that can be performed remotely and a dedicated customer service application. Dead coin battery If the key fob's unlock button is not working, there is a problem with the coin battery. The battery should last between three and four years with regular usage but it is possible to die suddenly. Fortunately, automakers include fail-safes in their products so that you can still start and lock your car even if your key fob is dead battery. The battery in the key fob is typically held in place by metallic retaining clips that complete the circuit. The battery might not be powered if the clips are worn or dirty. The battery also needs to be the correct size and type. If the battery is too small or large, it won't fit into the fob and won't perform as expected. Batteries for key fobs are sold under many names, including CR2016 and even CR2032. These are not interchangeable. Refer to the owner's manual for your model or look for a label on the fob that has the information. Once you have the right battery, you can swap it in a few minutes. Most fobs have a slider gap, or switch that you can use to pop open the cover and exchange the original battery for the new one. Make sure the new battery has the same voltage as the old one and is inserted correctly. Water damage Water is harmful to electronics, even if they have been through an wash cycle or dip. citroen dispatch key fob thekeylab.co.uk can destroy the battery and cause severe damage to the electronic chip inside. There are a few things you can do to reduce damage. It's important to first remove the battery first, and then dry the inside as possible. You can also clean the battery using a cotton swab, which has been submerged in 90 percent alcohol. After you've cleaned your key fob, you should wait a few days for it to completely dry out. You can accelerate the process by placing it on a high shelf that isn't disturbed. When you're certain that it is bone dry, try replacing the battery and operating it in the same way as you normally would. If your key fob not working, it could be that the receiver module in your car is defective and isn't able to transmit signals. This could be expensive to repair, but it's well worth trying if you want to avoid having to buy a new one. The most straightforward method to fix a malfunctioning key fob is to replace the battery. Removing the battery can bring back the radio signal and make your key fob work once more. If the problem continues, you should seek professional assistance. Receiver module that is defective In some cases, the key fob's receiver module may be affected by a fault that is preventing it from receiving or transmitting the correct signal. In this case, the car will not recognize the remote control key. It won't unlock or start. In this case the replacement remote control will be required. Read the owner's manual before trying to modify the key fob by yourself. Make sure the battery of the key fob is in good condition and that all buttons work. Close the doors and remove any other devices from the aftermarket, such as alarms or radios from your vehicle. You could also try cleaning the chip using isopropyl alcohol or electronic cleaner. If the chip has been damaged, you'll need to replace it. After cleaning the key fob, remove the circuit board. Clean the contacts using alcohol swabs, and let them dry. After the contacts are dry you can reassemble them and test the key fob. If the key fob still doesn't work, it might be required to replace the battery. Make sure you choose a battery with the same voltage level as the old battery. Verify the battery's position as the contact points of the battery are extremely sensitive. Faulty keyless entry systems It can be quite frustrating If the key fob ceases working. The positive side is that most times it's a breeze to get it back in operation. The most typical cause of a malfunctioning key fob is a dead coin battery which can be replaced within minutes. Other reasons include signal interference or a damaged module, and other electrical problems. The first step is to ensure that the battery is properly inserted and has the right voltage. It is also important to select the right battery type. If you use a battery that is not properly sized or polarized battery could damage the internal circuitry. You should also examine the fuses to ensure they're not blown or haven't melted. A transponder inside the key could be damaged or absent. This is a problem that requires further testing by a car dealer or professional mechanic. Dealerships and auto locksmiths will reprogram the fob of the key in vehicles for a small fee. However this can be costly. It might be worth it to reprogram your spare fob if you own one. In the majority of cases, you will get instructions from your owner's guide. If you don't have the manual you can find the instructions online or on YouTube. It is imperative to check the owner's manual prior attempting any repairs on the key fob.