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How to Fix a Key Fob That isn't Working

If your key fob doesn't work There are a few simple steps that can fix it. The first step is to make sure that it's not the backup remote.

If your backup remote can lock and unlock the doors of your car, then it is likely that the primary remote isn't working. The most common causes for key malfunctions for car remotes are circuitry or battery issues.

Battery

It is not unusual for the battery in the car key fob to degrade. It is quite simple to change out a battery, although it is essential to ensure that you use the right type that you can refer to your owner's manual or contact the dealer for the manufacturer to determine the type of battery you require. It's recommended to inspect the battery compartment with care, as dead batteries sometimes leak caustic chemicals that can cause damage to the remote. If replacing the battery does not solve the issue, there may be other issues that require attention from a professional. If buttons are damaged or stuck, for example it could be necessary to remove the remote and rebuild each component. You can also try reprogramming the vehicle to recognize the new remote.

Buttons

Key fobs may become dirty and worn out from repeated use. This is not unusual, but it can cause buttons to cease functioning or require a hard press for them to work. This can be very frustrating, especially when you are away from your home and have to switch on your car. Even worn-out or malfunctioning buttons can be fixed with a little effort and materials you already have at home.

First, make sure the batteries are up correctly and that the indentation on the back of the button is filled. Take the remote key fob repair apart and look over the circuit board. Check for signs of rust or other indications that the buttons have been damaged or worn. For example the paint that conducts electricity could be missing. Use a Q-tip that has been dipped in rubbing alcohol to gently clean any membrane contact that has become worn-out or where conductive painting is missing. Avoid rubbing too hard, since this could cause damage to the conductive paint and keyrepair stop the button from firing when the button is pressed.

Examine the battery connector's terminals carefully for any loose solder connections. Soldering them back into place will restore the button's functionality If this is the case. The same method 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 isn't working or need to be press extremely hard, the graphite disks at the back of the button might have worn out and need to replaced. This is usually done by rubbing a pencil on the disks. This should bring the button back to working.

If none of these solutions work, or if you still cannot get the button to respond when pressed hard, it could be that the circuitry is failing. This can sometimes be repaired with a quick clean and refitting, but it's best to have an extra fob available in the event this method doesn't work for you.

Circuitry

If the key fob buttons are working the circuit board that is inside the remote could be dirty. This issue can be fixed by a thorough inspection. The most common causes for dirty circuit boards are water and damaged cases. A damaged case can allow water and keyrepair other debris into the circuit board, which can cause it to short out. Water can also eat away at pins and small connectors on the board called via's.

If you're able to remove 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 looking at the battery terminal connections. If they are loose, the buttons could not function or get stuck in their down position. Soldering the terminals and buttons to their proper positions is usually enough to bring a non-working fob to a working condition.

Non-Remote transponder chips

The non-remote chips sealed in a sealed case are more durable than their remote fobs. However, they are susceptible to cracking in the event of a hole being drilled in them, or when a door handle for a car or lawnmowers is pushed over them. Failures of the fuse are typically the cause of non-remote chip failures.

If you're able to open the sealed key fob and are able to bear the mess, you can remove the circuit board and test the fuse with a multimeter to ensure that it is functioning as intended. function. If you're unsure about doing this, go to your local hardware store or Oreilly's, and they usually have an RF frequency tester that will determine if the key fob is sending a signal.

Programming

Key fobs are not indestructible and can be damaged by a lot of things. They may lose their connection to the car's receiver due to shock or a low battery, requiring them to be reprogrammed. A professional auto locksmith, or the main dealer can reprogram your key fob and get it back working again. If resetting or repairing your keyfob does not work it may be necessary to replace it.