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How to Fix a Key Fob That isn't Working If your key fob doesn't work and you're not sure why, you can fix it by following just a few steps. The first step is to make sure that it's not the backup remote. If the backup remote is able to lock and unlock your car doors it is most likely an issue with the primary remote. The most common causes for car remote key failure are circuitry or battery issues. Battery The battery inside the key fob could wear out over time. It is quite simple to replace batteries, but it is essential to make sure that you select the correct one; you can look in the owner's manual or talk to the manufacturer's dealer to determine the type of battery you require. It is also a good idea to inspect the battery compartment thoroughly since dead batteries may leak harmful chemicals that can harm the remote. If replacing the battery does not solve the issue there could be other issues that require attention from a professional. For car key fob repair near me g28carkeys.co.uk , if buttons appear stuck or broken It may be necessary to disassemble the remote and rebuild its components. You could also try reprogramming your car to recognize the new key fob. Buttons From repeated use, key fobs could wear out and become dirty. This is not uncommon however, it can cause buttons to cease functioning or require a hard press for them to function. This can be a huge hassle particularly if you're away from home and need to start your car. Fortunately, even worn-out or broken buttons can usually be fixed with just a bit of time and some of the materials you might already have in the house. First, check that the batteries are charged correctly and that the indentation on the back of the button is filled. Open the remote carefully and look over the circuit board. Check for signs of corrosion or other indications that buttons are worn out or damaged, like missing conductive paint. Use a Q-tip dipped into rubbing alcohol to gently clean any membrane contact that has become worn-out or where conductive painting is missing. Do not rub too vigorously in order to damage the conductive paint and stop the button from firing when it is pressed. Also, carefully check the battery connector's terminals to ensure any loose solder connections. If this is the case, simply soldering them back in place may bring back function to the button. The same procedure can be used to restore function to any other loose connections inside the fob. In the end, if any of the buttons made of rubber that are on the front of the key fob aren't functioning or require a long press to function, it is likely that the graphite disks on the back of the button are wearing down and need to be replaced. You can usually do this by rubbing a pen over the disks. This should bring the button to life. If none of these solutions work or you cannot get the button to respond when you press it hard, it is possible that the circuitry has failed. It is possible to fix the issue by cleaning and re-soldering the button however, you should have another spare in case it does not work. Circuitry If the key fob buttons are working the circuit board that is inside your remote might be dirty. This issue can be fixed through a thorough examination. The most frequent causes of dirty circuit boards are water and damaged cases. A damaged case can allow water and other debris into the circuit board, causing it to short out. Water can also damage pins and vias, which are tiny connectors on the board. If you're handy enough to open your key fob, and you're not afraid of a little mess, we can remove the solder from the buttons and then solder new ones in their place. Also, it's worth checking the connections between the battery terminals. If they're loose, the buttons could not work or even become stuck in their down position. Soldering the terminals and button's back in place is usually all that's needed to return keys that are not in working condition. Non-Remote transponder chips Sealed non-remote transponder chips are much more durable than remote fobs that have them however they are still susceptible to being damaged by a hole that is that is drilled into them or over by a lawnmowers blade or car door handle. Fuse failures are usually the cause of non-remote chip failures. If you're handy enough to open the sealed key fob and are able to bear the mess, you can easily remove the circuit board and check the fuse with a multimeter for proper diode function. If you're not confident doing this, head to your local hardware store or Oreilly's and they'll usually have a RF frequency tester that will let you know whether the key fob sending signals. Programming Key fobs endure many abuses and aren't completely indestructible. They may lose their connection to the car's receiver because of shock or a low battery, requiring them to be reprogrammed. A professional auto locksmith, or the main dealer can reprogram the key fob and get it back working again. In the rarer case that resetting and repairing your key fob fails, it could be time to replace it all over again.