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How to Fix a Key Fob That isn't Working If your key fob doesn't work There are a few simple steps that can be taken to fix it. First, ensure that it's not the backup remote. If your backup remote is unable to unlock and lock the doors of your car, it is most likely that the primary remote isn't working. The most frequent causes of car remote key failure are issues with the circuitry or battery. Battery It is not unusual to find a battery on a key fob for cars to wear out. It is fairly easy to change out the battery, however it is crucial to make sure that you use the right type; you can look in your owner's manual or contact the dealer of the manufacturer to find out what kind of battery you need. It is also essential to check the battery compartment as dead batteries can leak caustic chemicals that can harm the remote. If changing the batteries does not solve the issue, it may be that there are other issues that require attention from a professional. If the buttons are stuck or broken for instance it might be necessary to take the remote apart and rework each component. It is also possible to reprogramme the vehicle to recognize the new device. Buttons Through repeated use, key fobs may 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, especially when you are away from home and you need to switch on your car. Even broken or damaged buttons are often fixable with a little effort and materials you already have at home. 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 inspect the circuit board. Look for indications of rust or other indications that the buttons have been damaged or worn. For example the paint that conducts electricity could be missing. Use a Q-tip that has been dipped in rubbing alcohol to gently clean any membrane contact that is worn-out or has conductive paint missing. Avoid rubbing too hard as this can erode the conductive painting and prevent the button from firing when it is pressed. Examine mobile car key repair for any loose solder connections. If this is the case, simply connecting them back could bring back function to the button. The same procedure can be used to restore function to any other loose connections within the fob. If any of the rubber buttons located at the front of the keyfob isn't functioning or require to be press very hard the graphite disks on the back of the button might have worn out and need to replaced. It is usually done by rubbing a pen across the disks. This should bring the button back to life. If none of this is useful, or if the button still does not respond to a firm press, then it may be that the circuit board itself is damaged. It is possible to fix the issue by cleaning and re-soldering the fob but you should also have another spare in case it doesn't work. Circuitry The circuit board inside your remote control may be dirty regardless of whether the buttons on the key fob function or not. This issue can be fixed by a thorough inspection. Water and broken cases are the most common causes of dirty boards. A damaged case could let water and other debris to enter the circuit board, which can cause it to short. Water can also get through pins and vias, which are small connectors on the board. If you're handy enough to open up your key fob, and you're not afraid of a little mess, we can remove the solder from the buttons and solder new ones in their place. It's also worth looking at the battery terminal connections. If they are loose, the buttons could not function properly or become stuck in their down position. Soldering the terminals, and putting the button back into place is typically all that's required to return a non-working key fob to working condition. Non-Remote transponder chips The sealed non-remote chips are more durable than their remote fobs, however they can be cracked in the event of a hole being drilled in them, or when a door handle for a car or lawnmower runs over them. Fuse failures are usually to blame for non-remote chips failures. If you're able to open up the sealed key fob and are able to bear the mess, you can take off the circuit board and examine the fuse with a multimeter to ensure that it is functioning as intended. function. If you're unsure about doing this, go to your local hardware store or the Oreilly's and they will usually have a RFID frequency tester that can tell you if the key fob is transmitting a signal. Programming Key fobs are subject to lots of abuse and aren't impervious to damage. 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 a dealer in the main can reprogram your keyfob and get it working again. If resetting or repairing your keyfob does not work it may be necessary to replace it.