How to Fix a Key Fob That isn't Working If your key fob doesn't work A few easy steps can fix it. The first step is to make sure it's not the backup remote. If your backup remote is unable to unlock and lock the doors of your car, then it is most likely that the primary remote is not working. Most car remote key failures are caused by battery or circuitry problems. Battery The battery in a key fob can be worn out over time. It is easy to replace the battery. However, it is important that you choose the right type. You can consult the owner's manual or contact the manufacturer to inquire about the correct type. It is recommended to examine the battery compartment with care, as dead batteries sometimes release caustic chemicals that could damage the remote. If replacing the batteries doesn't solve the problem, it may be that there are other issues that require professional attention. For example, if buttons seem to be stuck or broken it could be necessary to take the remote apart and rework its components. You could also try reprogramming your car to recognize the new key fob. Buttons Key fobs may become filthy and worn out due to frequent use. This is not uncommon, but it can cause buttons to stop functioning or require a difficult press to get them to function. This can be very frustrating, especially when you are away from your home and you need to switch on your car. Even broken or damaged buttons can be fixed with a little time and the tools you already have at home. First, make sure the batteries are properly charged and that the indentation on the back of the button is filled. Take the remote apart and inspect the circuit board. Check for signs of corrosion or other signs that buttons are worn out or damaged, such as missing the conductive paint. Use a Q-tip dipped into alcohol to gently clean any membrane contact that has become damaged or has conductive paint missing. Avoid rubbing too hard because this could damage the conductive paint and stop the button from firing when it is pressed. Check the battery connector's terminals carefully for any loose solder connections. If this is the case, simply soldering them back in place can restore function to the button. You can use the same process to restore functionality to any other loose connection inside the fob. In the end, if any of the buttons made of rubber that are on the front of the key fob stop working or require a very hard press to work it is likely the graphite disks on the back of the button are wearing out and require replacement. You can usually do this by rubbing a pen across the disks. This should bring the button to life. If none of these solutions work, or if you still cannot get the button to respond when you press it hard, it could be that the circuitry has failed. It is possible to fix this 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 Whether or not the key fob buttons function, the circuit board inside your remote may be dirty. This problem can be resolved through a thorough examination. Broken cases and water are the most frequent causes of dirty boards. 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, which are known as via's. If you're able to open your key fob, and you don't mind making some mess, we can take the buttons out of their sockets and put in new ones. It's also worth checking the battery terminal connections. They can become very dirty and if they're loose, the buttons might not work or even stay in their down position. Soldering the terminals and buttons back into place is typically all that's needed to return the key fob that is not working to working order. Non-Remote transponder chips Sealed non-remote transponder chip are more durable than remote fobs that contain them however they are still susceptible to being broken by a hole being that is drilled into them or over by a lawnmowers blade or door handle for a car. Most of the time non-remote transponder chip failures can be attributed to a blown fuse. If you're not confident opening the key fob, you may take the circuit board off and use a multimeter to determine if the diode is functioning correctly. If you're not sure with this, go to your local Oreilly or hardware store and utilize their RF frequency tester. This will inform you whether the key fob sends an RF signal. Programming car keying repair are subject to a lot of abuse and aren't completely indestructible. They can lose their pairing to the receiver in your car due to shock or low battery, which requires them to be reprogrammed. A professional auto locksmith or main dealer will be able to reprogram your key fob to get it functioning again. In the event that resetting and repairing your key fob isn't working it may be time to replace it entirely.
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