How to Fix a Key Fob That isn't Working
If your key fob does not work and you're not sure why, you can fix it with some simple steps. The first step is to be sure that it's not your backup remote.
If the backup is able to lock and unlock your car door, it is most likely an issue with the primary remote. Most car remote key failures result from battery or circuitry problems.
Battery
It is not uncommon to find a battery on the key fob for cars to get worn out. It is simple to replace batteries. However it is crucial that you choose the right type. You can check the owner's manual or contact the manufacturer to find out the right type. It is also important to check the battery compartment, since dead batteries can leak caustic chemicals that can harm the remote. If changing the battery doesn't fix the issue there may be additional issues requiring professional attention. If the buttons are damaged or stuck for instance it might be necessary to take the remote apart and rework each component. You could also try reprogramming your vehicle to recognize the new key fob.
Buttons
Key fobs can become filthy and worn out due to repeated use. This is not atypical, but it can cause buttons to stop functioning or require a long press to work. This can be extremely frustrating especially if you're out of town and need to start your vehicle. Even broken or damaged buttons are often fixable with a bit of time and tools you already have at home.
First, make sure that the batteries are correctly placed and that the indentation on the back of the button is filled. Open the remote carefully and inspect the circuit board. Check for evidence of rust, or other indications that the buttons are damaged or worn. For instance there could be conductive paint missing. Use a Q-tip that has been dipped in alcohol to gently clean any membrane contacts that are damaged or where conductive paint is missing. Be careful not to rub too hard, as this can erode the conductive paint and block the button from firing when it is it is pressed.
Examine the battery connector's terminals carefully for any loose solder connections. If this is the case, soldering them back in place could restore function to the button. You can apply the same method to restore functionality to any other loose connection within the fob.
If repair keys near me of the rubber buttons at the front of the keyfob aren't functioning or require to be pressing very hard the graphite disks on the back of the button could have worn out and need to replaced. This can usually be done by rubbing a pencil over the disks. This should bring the button back to working.
If none of these solutions work, or if you still not be able to get the button respond when you press it hard, it could be that the circuitry has failed. This can be fixed with a quick clean and re-soldering, but it is best to have an extra fob available in the event this method does not work for you.
Circuitry
The circuit board in the remote control could be dirty, regardless of whether the buttons on the key fob work or not. The issue can be solved by a thorough inspection. Broken and damaged cases are the most frequent causes of boards that are dirty. A damaged case can allow water and other debris to enter and short out the electronics. Water can also damage pins and connectors that are small on the board, which are known as via's.
If you're able to open your key fob, and you're not afraid of a little mess, we can de-solder the buttons and solder new ones in their place. It's also worth examining the battery terminal connections. They can become very dirty and if they're loose, the buttons might not function or may even remain in their down position. Soldering the terminals and buttons to their proper positions is usually enough to restore a non-working fob to a working condition.
Non-Remote transponder chips
Sealed non-remote transponder chip are more durable than the remote fobs that have them but they can be cracked by a hole that is drilled into them or over by a lawnmowers or door handle for a car. The majority of non-remote transponder chip malfunctions can be blamed on a blown fuse.
If you're able to open up a sealed non-remote key fob and are able to bear the mess, you can easily remove the circuit board and check the fuse with an instrument to verify diode function. If you're unsure about doing this, visit your local hardware store or Oreilly's and they'll usually have an RF frequency tester that will let you know whether the key fob is transmitting a signal.
Programming
Key fobs are subject to a lot of abuse and aren't indestructible. They can break their connection with the receiver inside your vehicle due to shocks or low battery, which calls for changing the program. A professional auto locksmith or main dealer will be able to reprogram your key fob to get it back up and running. If, in the unlikely event that resetting or repairing your key fob isn't working it could be the time to replace it completely.