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How to Fix a Key Fob That isn't Working
If your key fob isn't working A few easy steps can fix it. First, make sure that it's not your backup remote.
If the backup is able to lock and unlock your car doors it is most likely an issue with the main remote. Most problems with car remote keys result from circuitry or battery problems.
Battery
The battery inside the key fob may wear out over time. It is fairly easy to replace the battery, however it is crucial to make sure that you choose the correct type; you can look in your owner's manual, or contact the manufacturer's dealer to find out the kind of battery you require. It is also crucial to check 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 problem, there may be other issues that require attention from a professional. For example, if buttons appear stuck or damaged it could be necessary to disassemble the remote and rebuild its components. You can also try reprogramming your vehicle to recognize the new key fob.
Buttons
Key fobs may become dirty and worn out from frequent use. It is not uncommon for buttons to stop functioning, or require a hard press to get them working. This can be a hassle, especially when you are away from your home and you need to turn on your car. Even worn-out or malfunctioning buttons can be fixed with a little effort and tools you already have at home.
First, make sure that the batteries are correctly inserted and that the indentation on the back of the button is filled. Then, open the remote with care and examine the circuit board. Examine for evidence of rust, or other signs the buttons are damaged or worn. For instance, conductive paint may be missing. Use a Q-tip that has been dipped in alcohol to gently clean any membrane contacts that have become damaged or have conductive paint missing. Don't rub too hard, as this could erode the conductive paint and prevent the button from firing when pressed.
Also, make sure to inspect the battery connector's terminals to ensure an unattached solder connection. If this is the case, reconnecting them can restore functionality to the button. The same method can be used to restore function to any other loose connections in the fob.
If any of the rubber buttons on the front of the keyfob are not working or require being press extremely hard, the graphite disks at here the back of the button could have worn out and will need to replaced. This can be done by rubbing a pencil over the disks, which should bring the button back to life.
If none of these solutions work or you are unable to get the button to respond when pressed hard, it is possible that the circuitry has failed. It is possible to fix this with a quick clean and replacing the solder, but it is ideal to have a spare fob in case this method doesn't work for you.
Circuitry
If the keys fob buttons are functioning the circuit board in the remote could be dirty. This problem can be resolved through a thorough examination. The most frequent causes of dirty circuit boards is water and broken cases. A damaged case could allow water and other debris to enter the circuit board, which can cause it to website short out. Water can also eat through pins and vias, which are the tiny connectors found on the board.
If you're skilled enough to open your key fob and aren't afraid of making some mess, we can remove the buttons from their sockets and then solder new ones. It's also worth looking at the battery terminal connections. If they are loose, the buttons could read more not function or get stuck in their down position. Soldering the terminals and buttons into place is usually enough to restore a non-working fob to working.
Non-Remote Transponder Chips
The sealed non-remote chips are more durable than their remote fobs, however they are susceptible to cracking if a hole is drilled in them, or when a door handle for a car or lawnmower runs over them. Failures of the fuse are typically the cause of non-remote chip failures.
If you're handy enough to open a key fob that is sealed and are willing to put up with the mess, you can easily remove the circuit board and check the fuse with an car keys repairs near me instrument to verify diode function. If you're unsure about doing this, visit your local hardware store or the Oreilly's and they usually have a radio frequency tester that can let you know whether the key fob transmitting a signal.
Programming
Key fobs aren't impervious to destruction and can be key repairs damaged by a variety of factors. They may lose their connection to the receiver in your car because of shock or a low battery, which requires them to be reprogrammed. A professional auto locksmith or main dealer will be able to reprogram your key fob to get it back up and running. In the rarer case that resetting and fixing your key fob isn't working, it could be time to replace it completely.