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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 with a few simple steps. First, ensure that it's not your backup remote.

If your backup remote cannot lock and unlock the doors of your car, it is likely that the main remote isn't functioning. Most car remote key failures are caused by circuitry or battery problems.

Battery

The battery inside the key fob may get worn out over the course of time. It is easy to replace the battery. However it is crucial to select the right kind. You can consult the owner's manual or contact the manufacturer to inquire about the right kind. It's recommended to examine the battery compartment thoroughly, as dead batteries sometimes leak harmful chemicals that can harm the remote. If changing the battery doesn't solve the issue there may be additional issues that require professional attention. If the buttons are stuck or broken, for example, it may be necessary disassemble the remote and rework each component. It is also possible to reprogramme the vehicle to recognize the new fob.

Buttons

Key fobs can get dirty and worn out from repeated use. It is not uncommon to have buttons stop working, or to require a hefty press to make them work. This can be frustrating especially when you're away from your home and need to start your car. Fortunately, even worn-out or malfunctioning buttons can often be fixed with a bit of time and a few items you may already have around the house.

First, check that the batteries have been correctly placed and that the indentation on the back of the button is filled. Then, carefully remove the remote and inspect the circuit board. Check for signs of corrosion or other indications that the buttons are worn or damaged, like missing paint that is conductive. Use the Q-tip, dipped in alcohol to gently clean any membrane contacts that have worn or have conductive paint missing. Be careful not to rub too hard, since this could cause damage to the conductive paint and stop the button from firing when it is pressed.

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

If, for instance, any of the rubber buttons on the front of the automotive key repair fob stop working or require a very difficult press to function it is likely that the graphite disks that are on the back of the button are wearing down and require replacement. You can do this by rubbing a pen over the disks. This will bring the button back to life.

If none of this is helpful, or if the button doesn't respond to a firm press, then it may be because the circuit board is damaged. This can be fixed by a quick clean, and re-soldering, but it is recommended to have an additional fob in case this method doesn't work for you.

Circuitry

The circuit board inside the remote control could be dirty, regardless of whether the buttons on the key fob work or not. This issue can be fixed through a thorough examination. Broken cases and water are the most common causes of boards that are dirty. A broken case allows water and other debris to get in and short out the electronics. Water can also destroy pins and connectors that are small on the board called via's.

If you're able to open your mobile Key repair Near me fob and you don't mind making an mess, you can take the buttons out of their sockets and solder in new ones. It's also worth checking the battery terminal connections. They can get very dirty and if they're loose, the buttons might not work or may even remain in their down position. Soldering the terminals and buttons to their original positions is often enough to bring a non-working fob to a working condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are much more durable than remote fobs that contain them but they can still be broken by a hole being that is drilled into them or over by a lawnmowers blade or door handle for a car remote key repair near me. Most of the time non-remote transponder chip malfunctions could be attributed to a blown fuse.

If you're not comfortable opening the key fob, you may take the circuit board off and use a multimeter to verify that the diode is functioning properly. If you're not comfortable doing this, visit your local hardware store or Oreilly's, and they usually have an RF frequency tester that will determine whether the key repair fob is sending signals.

Programming

Key fobs endure many abuses and aren't completely indestructible. They can lose their pairing with the receiver in your vehicle due to shocks or low battery, requiring the reprogramming. A professional auto key repair locksmith or a main dealer can reprogram your key fob to get it functioning again. In the event that resetting and fixing your key fob isn't working it may be time to replace it entirely.