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How to Fix a Key Fob That isn't Working

If your key fob repairs fob isn't working There are a few simple steps that can fix it. First, make sure that it's not your backup remote.

If your backup remote can unlock and lock the doors of your car, then it is likely that the primary remote isn't working. The majority of car remote key malfunctions are caused by battery or circuitry problems.

Battery

It is not uncommon for the battery in a key fob for cars to degrade. It is simple to replace the battery. However it is essential that you use the correct type. You can refer to your owner's manual or call the manufacturer to find out the right type. It is also crucial to check the battery compartment as batteries that are not working properly can release caustic chemicals that can harm the remote. If changing the battery doesn't fix the issue there may be additional issues that require professional attention. If the buttons are damaged or stuck for instance it could 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 may become dirty and worn-out from repeated use. It is not uncommon for buttons to cease functioning, or require a hefty press to make them work. This can be a hassle particularly when you're away from your home and need to turn on your car. Fortunately, local even worn-out or damaged buttons can be fixed with a bit of time and a few items you have in the home.

First, ensure that the batteries are up correctly and that the indentation on the back of the button is filled. Then, carefully open the remote and examine the circuit board. Examine for signs of rust or other indications that buttons are worn out or damaged, like missing paint that is conductive. Then, using a Q-tip that has been dipped in rubbing alcohol, gently clean any membrane contacts that are worn or where conductive paint is missing. Don't rub too hard, as this could erode the conductive paint, and block the button from firing when pressed.

Examine the battery connector's terminals carefully for any loose solder connections. If this is the case, simply reconnecting them may bring back function to the button. You can use the same procedure to restore functionality to any other loose connection in the fob.

If any of the rubber buttons at the front of the keyfob are not working or need to be pressing very hard the graphite disks at the back of the button may have worn out and will need to replaced. It is usually done by rubbing a pen over the disks. This should bring the button back to life.

If none of this is useful or if the button does not respond to a hard press It could be the case that the circuit board itself has become damaged. This can sometimes be repaired by a quick clean, and refitting, but it's ideal to have a spare fob in case this method fails for you.

Circuitry

The circuit board of your remote control could be dirty regardless of whether the buttons on the key fob are working or not. This problem can be resolved through a thorough examination. Water and broken cases are the most common causes of dirty boards. A damaged case could allow water and other debris into the circuit board, which can cause it to short out. 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 then solder new ones. It's also worth checking the battery terminal connections. They can become extremely dirty and if they're loose the buttons may not work or even stay in their down position. Soldering the terminals and button's back in their place is generally all that's needed to return the key fob that is not working to functioning condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chip are more durable than the remote fobs they are contained in, but they can still be cracked by a hole drilled into them or run over by a lawnmower or car remote key repair shop near me door handle. Fuse failures are usually to blame for non-remote chip failures.

If you are not comfortable opening the key fob, remove the circuitboard and local use a multimeter to check that the diode is functioning properly. If you're unsure about doing this, go to your local hardware store or Oreilly's and they'll usually have a RFID frequency tester that can let you know whether the key fob sending a signal.

Programming

Key fobs aren't indestructible and can be damaged through a variety of causes. They may lose their connection with the receiver inside your vehicle because of shocks or a low battery, requiring the reprogramming. A professional auto key repair 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 may be necessary to replace it.