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How to Fix a repair key fob Fob That isn't Working

If your key fob doesn't work, a few easy steps can be taken to fix it. First, make sure that it's not your backup remote key repair.

If your backup remote cannot unlock and lock the doors of your vehicle, it is likely that the main remote isn't functioning. The majority of repair car remote control key remote key malfunctions result from battery or circuitry problems.

Battery

The battery inside the key fob repairs fob may be worn out over time. It is quite simple to replace batteries, but it is important to ensure you choose the correct type and you can consult your owner's manual or contact the dealer for the manufacturer to determine the type of battery you need. It is also important to inspect the battery compartment as dead batteries can leak caustic chemicals which can damage the remote. If replacing the battery does not fix the issue there could be other issues requiring professional attention. If the buttons are stuck or broken, for example it could be necessary to remove the remote and rebuild each component. It is also possible to reprogramme the vehicle to recognize the new device.

Buttons

Due to repeated use, key fobs can wear out and become dirty. This is not uncommon however, it can cause buttons to cease working or require a very long press to function. This can be a huge hassle particularly if you're away from home and need to start your vehicle. Even worn-out or malfunctioning buttons are often fixable with a little effort and the tools you already have at home.

First, make sure that the batteries are correctly placed and that the indentation at the back of the button is filled. Then, carefully remove the remote and inspect the circuit board. Examine for indications of rust or other signs the buttons have been damaged or worn. For instance there could be conductive paint missing. Use a Q-tip dipped into alcohol to gently clean any membrane contact that has become damaged or where conductive paint is missing. Don't rub too hard, as this could erode the conductive paint and prevent the button from firing when pressed.

Check the battery connector terminals carefully for any loose solder connections. Soldering them back in place will allow the button to function again in the event that this is the situation. The same process can be used to restore function to any other loose connections inside the fob.

Finally, if any of the buttons made of rubber that are on the front of the key fob stop working or require a very difficult press to function it is likely the graphite disks that are on the back of the button are wearing out 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 It could be the case that the circuit board has become damaged. It is possible to fix the issue by cleaning and re-soldering the fob however, you should have a spare in case it does not work.

Circuitry

The circuit board in the remote control could be dirty regardless of whether the buttons on the key fob are working or not. A very thorough inspection is often enough to resolve this problem. Broken and damaged cases are the most frequent causes of dirty boards. A broken case can let water and other debris to get into the circuit board, which can cause it to short out. Water can also damage pins and vias, which are small connectors on the board.

If you're able to open your key fob, and you're not afraid of some mess, we can take off the buttons and then solder new ones in their place. It's also worth checking the connections between battery terminals. If they are loose, the buttons may not work or even become stuck in their down position. Soldering the terminals and buttons into place is usually enough to restore a non-working fob to a working condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are more durable than remote fobs that contain them but they can be broken by a hole being made in them or pushed over by a lawnmowers blade or car door handle. The failure of the fuse is usually the cause of non-remote chip failures.

If you're handy enough to open up the sealed key fob and can tolerate the mess, you can remove the circuit board and check the fuse using a multimeter for proper diode function. If you're not sure with this, you can visit your local Oreilly or hardware store and test their RF frequency tester. This will tell you whether the key fob is sending an RF signal.

Programming

Key fobs endure many abuses and aren't completely indestructible. They may lose their connection with the receiver in your vehicle because of shocks or a low battery, requiring changing the program. A professional auto locksmith, or main dealer, can reprogram your keyfob to get it working again. If resetting or repairing the keyfob is not working it is possible to replace it.