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How to Fix a Key Fob That isn't Working If your key fob won't work then you can fix it by following a few simple steps. First, check to make sure it's not the backup remote. If your backup remote cannot lock and unlock the doors of your car, then it is most likely that the primary remote isn't functioning. Most car remote key failures result from circuitry or battery problems. Battery It is not unusual for the battery in the key fob for cars to get worn out. It is quite simple to replace a battery, although it is important to ensure that you choose the correct type and you can consult the owner's manual or talk to the manufacturer's dealer to determine the type of battery you require. It is also essential to inspect the battery compartment, as dead batteries can leak toxic chemicals that could damage the remote. If changing the battery doesn't fix the issue there could be other issues that require professional attention. For instance, if the buttons appear stuck or broken, it may be necessary to take the remote apart and rebuild its components. You could also try reprogramming the vehicle to recognize the new fob. key fob repair to frequent use, key fobs can become worn and dirty. It is not uncommon to have buttons stop working, or to require a hard press to make them work. This can be frustrating particularly when you're away from home and you need to start your car. Fortunately, even worn out or malfunctioning buttons can often be fixed with a bit of time and a few materials you may already have around the home. First, make Related Homepag that the batteries have been correctly inserted and that the indentation on the back of the button has been filled. Take the remote apart and look over the circuit board. Look for signs of corrosion or other indications that the buttons are worn or damaged, like missing conductive paint. Use a Q-tip, dipped in alcohol to gently clean any membrane contact that is worn-out or has conductive paint missing. Do not rub too vigorously as this can damage the conductive paint and stop the button from firing when it is pressed. Also, be sure to check the battery connector's terminals to ensure an unattached solder connection. Soldering them back to their original position will allow the button to function again If this is the case. You can use the same process to restore functionality to any other loose connection inside the fob. If any of the rubber buttons located at the front of the keyfob are not working or require being pressed very hard the graphite disks on the back of the button might have worn out and will require replacement. You can usually do this by rubbing a pencil over the disks. This should bring the button back to life. If all of this doesn't help, or if the button doesn't respond to a hard press, then it may be the case that the circuit board is damaged. It is possible to fix this by 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 The circuit board inside your remote control may be dirty regardless of whether the buttons on the key fob work or not. This problem can be resolved through a thorough examination. The most common causes of dirty circuit boards is water and broken cases. A damaged case could allow water and other debris to enter the circuit board, causing it to short. Water can also eat away at pins and connectors on the board, which are known as via's. If you're able to open your key fob, and aren't afraid of making some mess, we 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 dirty and if they're loose the buttons might not function 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 back to working. Non-Remote transponder chips The non-remote chips that are sealed are more durable than remote fobs, however they are susceptible to breaking when a hole is made in them, or in the event that a door handle of a car or lawnmowers is pushed over them. Failures of the fuse are typically to blame for non-remote chip failures. If you're able to open up the sealed key fob and are able to bear the mess, you can remove the circuit board and test the fuse using an instrument to verify diode function. If you're not confident doing this, head to your local hardware store or Oreilly's and they usually have an RF frequency tester that will tell you whether the key fob transmitting a signal. Programming Key fobs are not indestructible and are susceptible to damage by a lot of things. They may lose their connection with the receiver in your vehicle due to shocks or low battery, which calls for changing the program. A professional auto locksmith or the main dealer can reprogram the key fob and get it back functioning again. In the rarer case that resetting and fixing your key fob isn't working it could be the time to replace it all over again.