How to Fix a Key Fob That isn't Working
If your key fob won't work, you can fix it by following a few simple steps. First, make sure that it's not the backup remote.
If the backup can lock and unlock your car door, then there is likely an issue with the primary remote. The most common causes for key problems with your car remote are battery or circuitry issues.
Battery
It is not uncommon to find a battery on a key fob for cars to get worn out. It is quite simple to replace a battery, although it is crucial to ensure that you choose the correct type and you can consult your owner's manual, or contact the dealer of the manufacturer to find out the kind of battery you need. 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 replacing the batteries doesn't solve the problem it could be that there are other issues that require attention by a professional. If buttons are broken or stuck, for example it might be necessary to disassemble the remote and rework each component. You can also try reprogramming the vehicle to recognize the new key fob.
Buttons
Key fobs can become dirty and worn out from frequent use. It is not uncommon for buttons to stop functioning, or require a hefty press to get them working. This can be a huge hassle, especially if you are away from home and need to start your vehicle. Even worn-out or car remote key repair near me are often fixable with a little effort and the tools you already have at home.
First, make sure that the batteries have been correctly placed and that the indentation at the back of the button is filled. Open the remote carefully and inspect the circuit board. Look for signs of rust or other indications that the buttons are damaged or worn out. For instance the paint that conducts electricity could be missing. Use a Q-tip that has been dipped in rubbing alcohol, gently clean any membrane contacts that are damaged or have conductive paint missing. Do not rub too vigorously as this can damage the conductive paint and prevent the button from firing when pressed.
Check the battery connector's terminals carefully for any loose solder connections. If this is the case, simply connecting them back may restore functionality to the button. You can use the same process to restore functionality to any other loose connection inside the fob.
Finally, if any of the rubber buttons on the front of the key fob aren't functioning or require a hard press to work, it is likely that the graphite disks at the back of the button are deteriorating and require replacement. It is usually done by rubbing a pen across the disks. This should bring the button to life.
If none of these solutions work, or if you still cannot get the button to respond when pressed hard, it is possible that the circuitry is failing. It is possible to fix this by cleaning and re-soldering the button but you should also have a spare in case it does not work.
Circuitry
If the keys fob buttons are functioning, the circuit board inside the remote could be dirty. A very thorough inspection is often enough to resolve this problem. The most common causes for dirty circuit boards are water and broken cases. A damaged case can allow water and other debris to get in and short circuit the electronics. Water can also damage pins and connectors on the board called via's.
If you're skilled enough to open your key fob and don't mind making some mess, we can take the buttons out of their sockets and put in new ones. Also, you should check the connections between battery terminals. If they're loose, the buttons might not function properly or become stuck in their down position. Soldering the terminals, and putting the button back in their place is generally all that's required to return the key fob that is not working to functioning condition.
Non-Remote transponder chips
Sealed non-remote transponder chips are more durable than remote fobs that have them however they are still susceptible to being broken by a hole being drilled into them or run over by a lawnmower or door handle for a car. Fuse failures are usually to blame for non-remote chip failures.
If you're able to open a sealed non-remote key fob and can tolerate the mess, you can remove the circuit board and test the fuse using a multimeter for proper diode function. If you're not confident doing this, head to your local hardware store or Oreilly's and they usually have a radio frequency tester that can tell you if the key fob is sending signals.
Programming
Key fobs aren't impervious to destruction and can be damaged by a lot of things. They can lose their pairing to the receiver in your car because of shock or a low battery, requiring them to be reprogrammed. A professional auto locksmith or a main dealer can reprogram your key fob and get it functioning again. If resetting or fixing your keyfob does not work it is possible to replace it.