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How to Fix a Key Fob That isn't Working If your key fob does not work, you can fix it by following some simple steps. The first step is to be sure that it's not your backup remote. If your backup remote is unable to lock and unlock the doors of your car, it is likely that the primary remote isn't working. The majority of car remote key malfunctions result from circuitry or battery problems. Battery It is not unusual to find a battery on a car key fob to get worn out. It is fairly easy to replace the battery, however it is crucial to make sure that you select the correct one and you can consult the owner's manual or talk to the dealer for the manufacturer to determine the type of battery you need. It is also crucial to inspect the battery compartment as dead batteries can leak toxic chemicals that could damage the remote. If replacing the batteries doesn't solve the issue it could be because there are other issues that require professional attention. If the buttons are broken or stuck for instance it could be necessary to take the remote apart and rework each component. You could also try reprogramming the vehicle to recognize the new key fob. Buttons Key fobs may become filthy and worn out due to frequent use. It is not uncommon for buttons to cease functioning, or require a hefty push to make them work. This can be very frustrating especially if you're away from home and you 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 have in the home. First, make sure that the batteries have been correctly placed and that the indentation at the back of the button has been 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 paint that is conductive. Use a Q-tip dipped in alcohol to gently clean any membrane contacts that have worn or have conductive paint missing. Don't rub too hard as this can damage the conductive paint, and block the button from firing when it is pressed. Check the battery connector terminals carefully for any loose solder connections. If this is the case, reconnecting them may bring back function to the button. The same method can be used to restore function to any loose connections inside the fob. Finally, if any of the rubber buttons on the front of the key fob aren't working or require a very hard press to work, it is likely that the graphite disks that are on the back of the button are wearing down and require replacement. This can be done by rubbing a pencil on the disks, which should bring the button back to its original state. If mobile car key repair of these solutions work, or if you still cannot get the button to respond when pressed hard, it could be that the circuitry is failing. It is possible to fix this by a quick clean, and re-soldering, but it is ideal to have a spare fob available in the event this method doesn't work for you. Circuitry The circuit board of your remote control may be dirty regardless of whether the buttons on the key fob function or not. The issue can be solved by a thorough inspection. The most frequent causes of dirty circuit boards is water and damaged cases. A broken case can allow water and other debris to get into the circuit board, causing it to short out. broken car key repair near me can also damage pins and vias, which are the tiny connectors that are found on the board. If you're handy enough to open up your key fob and aren't afraid of some mess, we can remove the solder from the buttons and then solder new ones in their place. Also, you should check the connections between the battery terminals. If they're loose, the buttons might not function or get stuck in their down position. Soldering the terminals and buttons back in their place is generally all that's needed to return the key fob that is not working to working condition. Non-Remote Transponder Chips Sealed non-remote transponder chips are more durable than remote fobs that contain them but they can be damaged by a hole that is drilled into them or run over by a lawnmowers blade or car door handle. The majority of non-remote transponder chips fail, and this can be blamed on blowing fuses. If you're able to remove 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, go to your local hardware store or Oreilly's, and they'll usually have an radio frequency tester that can tell you whether the key fob transmitting a signal. Programming Key fobs aren't indestructible and can be damaged by a variety of factors. They can lose their pairing with the receiver in your vehicle due to shocks or a low battery, which calls for the reprogramming. A professional auto locksmith or main dealer will be able to reprogram your key fob and get it working again. In the event that resetting and fixing your key fob doesn't work it could be the time to replace it completely.