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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 fix it. The first step is to be sure that it's not the backup remote.

If your backup remote is unable to lock and unlock the doors of your car, it is likely that the main remote is not working. Most problems with car remote keys are caused by circuitry or battery problems.

Battery

The battery in the key fob may be worn out over time. It is relatively easy to change out a battery, although it is important to ensure that you use the right type and you can consult the owner's manual or talk to the manufacturer's dealer to find out the kind of battery you require. It is recommended to inspect the battery compartment with care, as dead batteries sometimes leak harmful chemicals that can damage the remote. If changing the batteries does not solve the issue, it may be that there are other issues that require attention from a professional. If buttons are broken or stuck for instance, it may be necessary take the remote apart and rework each component. You could also try reprogramming the vehicle to recognize the new fob.

Buttons

Due to frequent use, key fobs could wear out and become dirty. It is not unusual for buttons to stop functioning, or require a hard push to make them work. car key repair near me can be frustrating particularly when you're away from your home and need to start your car. Fortunately, even worn-out or damaged buttons can be fixed with a little time and a few materials you have in the house.

First, make sure the batteries are charged correctly and that the indentation on the back of the button is filled. Open the remote carefully and look over the circuit board. Look for signs of corrosion or other indications that buttons are worn out or damaged, like missing the conductive paint. Utilizing a Q-tip that has been dipped in alcohol, gently clean any membrane contacts that have become worn or where conductive paint is missing. Be careful not to rub too hard, since this could cause damage to the conductive paint and block the button from firing when it is it is pressed.

Also, make sure to inspect the battery connector's terminals to ensure a loose solder connection. If this is the case, connecting them back could restore function to the button. The same method can be used to restore function to any other loose connections within the fob.

If, for instance, any of the buttons made of rubber that are on the front of the key fob aren't working or require a long press to function it is likely the graphite disks that are on the back of the button are deteriorating and need to be replaced. This is usually done by rubbing a pencil on the disks. This should bring the button back to its original state.

If none of these solutions work, or if you still are unable to get the button to respond when you press it hard, it is possible that the circuitry has failed. It is possible to fix this by cleaning and re-soldering the button, but you should have an extra in case it doesn't work.

Circuitry

The circuit board inside your remote control could be dirty, regardless of whether the buttons on the key fob function or not. This problem can be resolved through a thorough examination. Broken cases and water are the most frequent causes of boards that are dirty. A damaged case allows water and other debris to pass through and short out the electronic components. Water can also damage pins and vias, which are the tiny connectors that are found on the board.


If you're able to open your key fob and 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 connections between the battery terminals. They can become very filthy and if they're not tight enough, the buttons might not work or may even remain in their down position. Soldering the terminals and button's back into place is typically all that's required to return a non-working key fob to working order.

Non-Remote transponder chips

The non-remote chips that are sealed are more durable than remote fobs, but they are susceptible to cracking if a hole is drilled in them or in the event that a door handle of a car or lawnmowers plows over them. Most of the time, non-remote transponder chips fail, and this could be attributed to an exploded fuse.

If you're handy enough to remove a sealed non-remote key fob and can tolerate the mess, you can easily remove the circuit board and check the fuse with an instrument to verify diode function. If you're not confident doing this, go to your local hardware store or Oreilly's and they usually have an RFID frequency tester that can determine whether the key fob sending a signal.

Programming

Key fobs aren't indestructible and are susceptible to being damaged by a lot of things. They can lose their pairing with the receiver in your vehicle because of shocks or a low battery, which calls for the reprogramming. A professional auto locksmith or a dealer in the main can reprogram the keyfob to get it functioning again. If resetting or fixing your key fob fails it is possible to replace it.

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