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How to Fix a Key Fob That isn't Working

If your key fob does not work then you can fix it by following some simple steps. First, check to make sure it's not the backup remote.

If the backup remote is able to lock and unlock your car doors then there is likely an issue with the main remote. The most common causes of key problems with your car key remote repair remote are issues with the circuitry or battery.

Battery

The battery inside a key fob can get worn out over the course of time. It is simple to replace batteries. However, it is important to select the right type. You can check your owner's manual or call the manufacturer to inquire about the right kind. It is also essential to inspect the battery compartment, as dead batteries can leak caustic chemicals which can damage the remote. If changing the battery doesn't fix the problem, there may be other issues requiring professional attention. For instance, if the buttons seem to be stuck or damaged, it may be necessary to take the remote apart and rework its components. You can also try reprogramming the vehicle to recognize the new fob.

Buttons

From repeated use, key fobs can get dirty and worn. It is not common for buttons to stop working, or to require a hard push to make them work. This can be very frustrating particularly when you're away from your home and have to start your car. Fortunately, even worn-out or broken buttons can usually be fixed with a bit of time and a few items you may already have around the house.

First, check that the batteries are up correctly and that the indentation on the back of the button is filled. Take the remote apart and examine the circuit board. Look for signs of corrosion or other signs that the buttons are worn or damaged, such as missing paint that is conductive. Then, using a Q-tip that has been dipped in alcohol, gently clean any membrane contacts that have damaged or have conductive paint missing. Avoid rubbing too hard, as this can erode the conductive paint and stop the button from firing when it is pressed.

Also, be sure to check the battery connector terminals for any loose solder connections. If this is the case, connecting them back could restore functionality to the button. You can use the same process to restore functionality to any other loose connection within the fob.

If, for instance, any of the rubber buttons on the front of the key fob aren't working or require a very hard press to work it is likely the graphite disks on the back of the button are wearing down and need to be replaced. You can usually do this by rubbing a pencil over the disks. This should bring the button back to life.

If none of these solutions work or you are unable to get the button to respond when you press it hard, it could be that the circuitry is failing. It is possible to fix the issue by cleaning and re-soldering your fob however, you should have an extra in case it does not work.

Circuitry

Whether or not the key fob buttons function the circuit board in your remote may be dirty. A thorough examination is usually enough to fix this issue. Water and broken cases are the most frequent causes of boards that are dirty. A damaged case can allow water and other debris to get in and short out the electronic components. Water can also eat through pins and vias, which are the tiny connectors that are found on the board.

If you're able to open your key fob and you don't mind making an mess, you can remove the buttons from their sockets and solder in new ones. It's also worth looking at the battery terminal connections. They can become extremely filthy and if they're not tight enough, the buttons may not work or may even remain in their down position. Soldering terminals and buttons back to their original positions is often enough to return a malfunctioning fob back to working.

Non-Remote transponder chips

The non-remote chips sealed in a sealed case are more durable than their remote fobs, however they can be cracked if a hole is drilled in them or if a repair car key fob door handle or lawnmowers is pushed over them. Failures of the fuse are typically to blame for non-remote chips failures.

If you're handy enough to open a sealed non-remote key fob and are able to bear the mess, you can easily remove the circuit board and test the fuse with a multimeter to ensure that it is functioning as intended. function. If you're not confident doing this, head to your local hardware store or Oreilly's, and they usually have a RF frequency tester that will tell you if the key fob is sending a signal.

Programming

Key fobs are not indestructible and are susceptible to damage by a variety of factors. They can break their connection with the receiver in your vehicle due to shocks or low battery, requiring the reprogramming. A professional Auto Key Fob Repair locksmith or dealer can reprogram your key fob and get it working again. If resetting or fixing your keyfob does not work it may be necessary to replace it.