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How to Fix a Key Fob That isn't Working If your key fob isn't functioning A few easy steps can fix it. First, make sure that it's not the backup remote. If the backup remote is able to lock and unlock your car door, it is most likely an issue with the primary remote. Most car remote key failures result from circuitry or battery problems. Battery It is not unusual to find a battery on the key fob for cars to wear out. It is relatively easy to change out batteries, but it is crucial to ensure you use the right type that you can refer to the owner's manual or talk to the dealer for the manufacturer to determine the type of battery you require. It's recommended to inspect the battery compartment carefully, as dead batteries sometimes leak caustic chemicals that can harm the remote. If changing the battery doesn't fix the issue, there may be other issues requiring professional attention. If the buttons are broken or stuck for instance it might be necessary to remove the remote and rebuild each component. It is also possible to reprogramme the vehicle to recognize the new remote. Buttons From frequent use, key fobs may get dirty and worn. It is not unusual to have buttons stop working, or to require a hefty press to make them work. This can be a huge hassle particularly if you're away from home and need to start your vehicle. Fortunately, even worn out or damaged buttons can be fixed with just a bit of time and some of the materials you may already have around the home. First, check that the batteries are charged correctly and that the indentation on the back of the button is filled. Then, carefully open up the remote and inspect the circuit board. Look for signs of rust or other signs the buttons are damaged or worn out. For instance the paint that conducts electricity could be missing. Use a Q-tip, dipped in alcohol to gently clean any membrane contact that has damaged or has conductive paint missing. Do not rub too vigorously in order to damage the conductive paint and stop the button from firing when pressed. Also, be sure to check the battery connector terminals for an unattached solder connection. Soldering them back to their original position will restore the button's functionality if this is the case. The same procedure can be used to restore function to any other loose connections inside the fob. Finally, if any of the buttons made of rubber that are on the front of the key fob have stopped functioning or require a hard press to work, it is likely that the graphite disks on the back of the button are wearing down and need to be replaced. You can do this by rubbing a pencil 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 could be that the circuitry has failed. It is possible to fix this issue by cleaning and re-soldering the button however, you should have an extra in case it doesn't work. Circuitry If the key fob buttons function the circuit board that is inside your remote might be dirty. A very thorough inspection is usually enough to fix this problem. mouse click the up coming document of dirty circuit boards are water and damaged cases. A broken case allows water and other debris to pass through and short circuit the electronics. Water can also get through pins and vias, which are the tiny connectors that are found on the board. If you're able to open your key fob and don't mind a little mess, we can take off the buttons and put new ones in their place. It's also worth checking the battery terminal connections. If they're loose, the buttons could not work or even become stuck in their down position. Soldering the terminals, and putting the button back in their place is generally all that's required to return the key fob that is not working to working order. Non-Remote Transponder Chips The non-remote chips sealed in a sealed case are more durable than their remote fobs. However, they can be cracked if a hole is drilled into them or if a car door handle or lawnmowers is pushed over them. Most of the time, non-remote transponder chips fail, and this can be attributed to blowing fuses. If you're able to remove a key fob that is sealed and are willing to put up with the mess, you can remove the circuit board and check the fuse with a multimeter for proper diode function. If you don't feel comfortable with this, visit your local Oreilly or hardware store and utilize their RF frequency tester. This will let you know whether the key fob sends signals. Programming Key fobs endure many abuses and aren't indestructible. They can lose their pairing to the receiver in your car due to shock or low battery, which calls for the reprogramming. A professional auto locksmith or a main dealer will be able to reprogram your key fob and get it back up and running. In the rarer case that resetting and repairing your key fob doesn't work it may be time to replace it completely.