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How to Fix a Key Fob That isn't Working If your key fob doesn't work, a few easy steps can be taken to fix it. First, ensure that it's not the backup remote. If the backup can lock and unlock your car doors, it is most likely an issue with the main remote. keys repair of key problems with your car remote are issues with the circuitry or battery. Battery It is not uncommon for the battery inside the key fob for cars to get worn out. It is simple to replace batteries. However it is crucial that you use the correct type. You can consult your owner's guide or contact the manufacturer to inquire about the right kind. It is also essential to inspect the battery compartment, as batteries that are not working properly can release caustic chemicals which can damage the remote. If changing the battery doesn't fix the issue, there may be other issues requiring professional attention. If the buttons are stuck or broken for instance it could be necessary to take the remote apart and rework each component. You can also try reprogramming your car to recognize the new key fob. Buttons Key fobs can get dirty and worn-out from repeated use. This is not atypical, but it can cause buttons to cease working or require a difficult press to get them to function. This can be frustrating especially when you're away from home and need to turn on your car. Fortunately, even worn-out or broken buttons can usually be fixed with a little time and a few items you might already have in the home. First, ensure that the batteries are charged correctly and that the indentation on the back of the button is filled. Then, carefully open up the remote and look at the circuit board. Look for signs of corrosion or other signs that the buttons are worn out or damaged, like missing paint that is conductive. Use the Q-tip, dipped in alcohol, gently clean any membrane contacts that are worn or where conductive paint is missing. Be careful not to rub too hard, as this can erode the conductive painting and prevent the button from firing when it is pressed. Examine the battery connector's terminals carefully for any loose solder connections. Soldering them back to their original position will restore the button's functionality If this is the case. The same method can be used to restore function to any other loose connections within the fob. In the end, if any of the buttons made of rubber on the front of the key fob aren't functioning or require a long press to function it is likely the graphite disks that are on the back of the button are wearing down and require replacement. This can be done by rubbing a pencil across the disks, which will bring the button back to working. If none of these solutions work, or if you still are unable to get the button to respond when you press it hard, it is possible that the circuitry has failed. It is possible to fix the issue by cleaning and re-soldering your fob, but you should have another spare in case it does not work. Circuitry If the key fob buttons are working the circuit board that is inside your remote might be dirty. This problem can be resolved by a thorough inspection. The most frequent causes of dirty circuit boards are water and damaged cases. A broken case can allow water and other debris to enter the circuit board, causing it to short out. car key repair cost can also damage pins and connectors on the board called via's. If you're able to open your key fob, and aren't afraid of making an mess, you can take the buttons out of their sockets and put in new ones. Also, you should check the connections between battery terminals. If they are loose, the buttons might not function properly or become stuck in their down position. Soldering the terminals back to their proper positions is usually enough to return a malfunctioning fob to working. Non-Remote Transponder Chips The non-remote chips sealed in a sealed case are more durable than remote fobs, however they are susceptible to breaking if a hole is drilled in them or if a car door handle or lawnmowers is pushed over them. Fuse failures are usually to blame for non-remote chip failures. If you're able to remove a key fob that is sealed and are able to bear the mess, you can remove the circuit board and check the fuse with a multimeter for proper diode function. If you're not confident doing this, visit your local hardware store or Oreilly's and they will usually have an radio frequency tester that can let you know whether the key fob is sending signals. Programming Key fobs endure lots of abuse and aren't completely indestructible. They can lose their pairing to the receiver in your car due to shock or a low battery, which requires them to be reprogrammed. A professional auto locksmith or main dealer can reprogram your key fob and get it working again. In the event that resetting or repairing your key fob isn't working it may be time to replace it all over again.