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How to Fix a Key Fob That isn't Working

If your key fob won't work, you can fix it by following some simple steps. The first step is to make sure that it's not the backup remote.

If your backup remote key fob repairs cannot lock and unlock the doors of your car, then it is likely that the main remote is not working. The most frequent causes of key problems with your car remote are battery or circuitry issues.

Battery

The battery inside a key fob can be worn out over time. It is easy to replace a battery. However, it is important that you use the correct type. You can refer to your owner's guide or contact the manufacturer to inquire about the right type. It is also essential to inspect 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 could be other issues that require attention from a professional. If buttons are stuck or broken, for example, it may be necessary take the remote apart and rework each component. It is also possible to reprogramme the vehicle to recognize the new device.

Buttons

Through repeated use, key fobs can wear out and become dirty. This is not uncommon however, it can cause buttons to stop working or require a long press to work. This can be extremely frustrating, especially if you are out of town and need to start your car. Even worn-out or malfunctioning buttons are often fixable with a little time and tools you already have at home.

First, make sure that the batteries have been correctly inserted and that the indentation at the back of the button has been filled. Open the remote carefully and examine the circuit board. Look for signs of rust or other signs the buttons have been damaged or worn out. For instance the paint that conducts electricity could be missing. Use a Q-tip, dipped in alcohol to gently clean any membrane contact that has worn-out or where conductive paint is missing. Avoid rubbing too hard because this could damage the conductive painting and prevent the button from firing when the button is pressed.

Check the battery connector terminals for loose solder connections. If this is the case, soldering them back in place can restore functionality to the button. The same process can be used to restore function to any loose connections inside the fob.

In the end, if any of the buttons made of rubber on the front of the key fob stop functioning or require a long press to function it is likely the graphite disks at the back of the button are deteriorating and need to be replaced. You can do this 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 doesn't respond to a hard push, then it may be the case that the circuit board itself has become damaged. It is possible to fix this by cleaning and re-soldering your fob however, you should have a spare in case it does not work.

Circuitry

If the key fob buttons function the circuit board that is inside your remote may be dirty. A thorough inspection is usually enough to fix this problem. Broken cases and water are the most frequent causes of boards that are dirty. A broken case allows water and other debris to get in and short circuit the electronic components. Water can also damage pins and small connectors on the board called via's.

If you're able to open your key fob, and you don't mind making a mess, we can remove the buttons from their sockets and solder in new ones. It's also worth checking the connections between the battery terminals. If they're loose, the buttons may not function properly or become stuck in their down position. Soldering terminals and buttons back into place is usually enough to return a malfunctioning fob to working.

Non-Remote Transponder Chips

The non-remote chips sealed in a sealed case are more durable than remote fobs, however they are susceptible to breaking when a hole is made in them or when a door handle for a car or lawnmowers plows over them. Most of the time, non-remote transponder chip malfunctions can be blamed on blowing fuses.

If you're able to open a key fob that is sealed and are able to bear the mess, you can take off the circuit board and local test the fuse using a multimeter to ensure that it is functioning as intended. function. If you're not confident doing this, go to your local hardware store or Oreilly's, and they'll usually have a radio frequency tester that can tell you whether the key fob is sending signals.

Programming

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