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Citroen C3 Key Fob Replacement If your C3's key fob stops working all of a sudden, it could be due a defective receiver module. If citroen berlingo van key replacement , it could be because of other issues, such as water damage or a dead battery. Citroen hopes to meet the needs of the masses with its eC3. It has a range of features including virtual remote diagnosis as well as an app that is specifically designed for customer service. Dead coin battery If the unlock button on the key fob isn't working, or if the unlock button does not work, it could mean that the battery for the coin is faulty. The battery is expected to last between three and four years if used regularly but it can fail suddenly. Luckily, car makers have built-in fail-safes to ensure that you can still start and lock your vehicle even if your key fob is dead battery. The battery in the key fob is normally secured by metal clips for retaining that complete the circuit. If they're worn or dirty, the battery might not be able to receive the power. The battery must be the right size and type. If the battery is too small or too large it will not fit on the fob and will not function properly. Key fob batteries are often sold under different names, including CR2016 and CR2032 (though they're not interchangeable). Check out the owner's manual or look for a sticker on the fob that contains the details. Once you have the right battery, you can replace it in a few minutes. Most fobs have either a slider or switch or a gap. These can be used to pry the cover and replace the battery that was used. Make sure that the new battery is of the same voltage and is inserted in the correct direction. Water damage Even even if your key-fob has survived the wash cycle or an immersion in the pool, water is not ideal for electronics. It can cause damage to the chip and damage a battery. Fortunately, there are actions you can take to minimize the damage. First, it's crucial to remove the battery and dry out the inside and circuit board as much as possible. You can also clean the battery using a cotton swab which has been dipped in 90 percent alcohol. After you've cleaned the key fob, wait a few days for it to completely dry. You can speed it up by placing it high on a shelf so that it won't get disturbed. Once you are sure that the battery is dry, put in an additional battery and continue using it as usual. If the key fob isn't working, it could have a malfunctioning receiver module that cannot transmit signals to your car. It's costly to repair, but worth it if you don't need to replace your vehicle. The easiest way to fix a malfunctioning key fob is to change the battery. The radio signal will be restored and your key fob will be operational again after changing the battery. If the issue persists then you should seek out assistance from a professional. A malfunctioning receiver module In some cases the key fob's reception module could have a problem that stops it from receiving and transmitting the correct signal. If this is the situation, your car will not recognize the remote control key and will not be able to unlock or start the engine. In this instance you'll have to purchase a new one. The steps required to reprogram the key fob are different for each model and make So, make sure to consult the owner's guide before trying to do it yourself. Make sure the battery of the key fob is in good condition and that all buttons are functioning. Also, shut the doors and disconnect any other aftermarket devices, such as radios or alarm systems from the vehicle. You might also try cleaning your chip with isopropyl alcohol or electronic cleaner. If the chip has become damaged, it will probably need to be replaced. After cleaning the key fob, take it off the circuit board. Clean the contacts using alcohol swabs. Let them dry. Once the contacts have dried, you can put them back together and test the key fob. If the key fob still doesn't work, it might be necessary to replace the battery. Make sure you choose a battery with the same voltage that the original battery. It's also a good idea to check that the battery is installed correctly in the first place, since the contact points are very sensitive. Keyless entry systems with malfunctions It can be quite frustrating if the key fob stops functioning. It's generally easy to get your key fob back functioning. The most common cause for a malfunctioning key fob is a dead coin battery, which can be replaced in minutes. Other causes are signal interference or a defective module, as well as other electrical problems. The first step is to ensure that the battery is correctly placed and has the proper voltage. It is also crucial to select the correct battery type. The internal circuitry of the device may be damaged in the event of using a battery that is not the proper size or polarized. You can also check the fuses to make sure they aren't blown out or haven't melted. Another possibility is that the transponder in the key might have been damaged or lost. This issue will require further diagnosis by a professional mechanic or dealer in cars. Auto locksmiths and dealerships can reprogram the key fob of a car for a fee, but this can be costly. It could be worthwhile to reprogram your spare fob, if you have one. In most cases, you'll find instructions in your owner's guide. If you do not have the manual, you can search for instructions online or on YouTube. It is imperative to check the owner's manual before attempting any repairs on the key fob.