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How to Fix a Key Fob That isn't Working
If your key fob isn't functioning A few easy steps can be taken to fix it. The first step is to make sure that it's not the backup remote.
If your backup remote key fob repair can unlock and lock the doors of your car, then it is likely that the primary remote is not working. Most problems with car key repairs remote keys result from circuitry or battery issues.
Battery
The battery in a key fob can wear out over time. It is simple to replace batteries. However, it is important that you choose the right kind. You can check the owner's manual or contact the manufacturer to inquire about the right type. It's recommended to inspect the battery compartment with care because dead batteries can leak harmful chemicals that can damage the remote. If replacing the battery does not fix the problem, there may be other issues that require professional attention. For instance, if buttons seem stuck or broken, it may be necessary to disassemble the remote and rework its components. It is also possible to reprogramme the vehicle to recognize the new device.
Buttons
From repeated use, key fobs can get dirty and worn. This is not atypical however it can cause buttons to cease working or require a very long press to work. This can be very frustrating particularly when you're away from home and have to switch on your car. Even worn-out or malfunctioning buttons can be fixed with a bit of time and the tools you already have at home.
First, check that the batteries are properly installed and that the indentation at the back of the button is filled. Then, carefully open the remote and inspect the circuit board. Look for signs of rust or other signs the buttons have been worn or damaged. For example there could be conductive paint missing. Use a Q-tip that has been dipped in rubbing alcohol to gently clean any membrane contact that is damaged or where conductive paint is missing. Don't rub too hard as this can damage the conductive paint and stop the button from firing when pressed.
Check the battery connector's terminals for loose solder connections. If this is the case, reconnecting them could restore functionality to the button. The same procedure can be used to restore function to any loose connections inside the fob.
If any of the rubber buttons on the front of the keyfob aren't working or need to be pressed very hard the graphite disks at the back of the button could have worn out and will need to replaced. This is usually done by rubbing a pencil on the disks, which should bring the button back to its original state.
If none of this is helpful, or if the button still doesn't respond to a hard push, then it may be because the circuit board is damaged. It is possible to fix the issue by cleaning and re-soldering your fob, but you should have an extra in case it does not work.
Circuitry
Whether or not the keys fob buttons are functioning the circuit board that is inside your remote might be dirty. This problem can be resolved by a thorough inspection. Broken cases and water are the most common causes of dirty boards. A damaged case can allow water and other debris to get into the circuit board, causing it to short out. Water can also get through pins and vias, which are the tiny connectors found on the board.
If you're able to open your key fob and aren't afraid of a little mess, we can de-solder the buttons and then solder new ones in their place. It's also worth checking the connections between the battery terminals. If they are loose, the buttons might not work or even become stuck in their down position. Soldering the terminals back into place is usually enough to restore a non-working fob back to working.
Non-Remote Transponder Chips
The non-remote chips sealed in a sealed case are more durable than remote fobs. However, they can be cracked if a hole is drilled in them or when a door handle for a car or lawnmowers is pushed over them. Most of the time, non-remote transponder chip malfunctions could be attributed to a blown fuse.
If you're not confident opening the key fob, you may take the circuit board off and use a multimeter to check that the diode is functioning correctly. If you're unsure about doing this, head to your local hardware store or Oreilly's and they usually have an RFID frequency tester that can let you know whether the key fob sending signals.
Programming
Key fobs are subject to lots of abuse and aren't indestructible. They can lose their pairing to the repair car key remote, visit their website,'s receiver due to shock or a low battery, which calls for them to be reprogrammed. A professional auto locksmith or a main dealer can reprogram your key fob and get it working again. In the rarer case that resetting or repairing your repair key fob isn't working, it could be time to replace it completely.