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How to Fix a Key Fob That isn't Working If your key fob won't work then you can fix it with a few simple steps. The first step is to make 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 main remote isn't working. Most problems with car remote keys are caused by battery or circuitry problems. Battery The battery inside the key fob may get worn out over the course of time. It is quite simple to replace a battery, although it is essential to ensure you select the correct one that you can refer to your owner's manual, or contact the dealer of the manufacturer to find out what kind of battery you require. remote key fob repair is also important to inspect the battery compartment, as dead batteries can leak caustic chemicals which can damage the remote. If changing the batteries doesn't solve the issue it could be because there are other issues that require professional attention. For instance, if the buttons seem to be stuck or damaged It may be necessary to take the remote apart and rework its components. You can also try reprogramming the vehicle to recognize the new remote. Buttons Key fobs can become filthy and worn out due to repeated use. This is not uncommon, but it can cause buttons to stop functioning or require a difficult press to get them to work. This can be very frustrating, especially when you are away from home and need to turn on your car. Fortunately, even worn out or broken buttons can usually be fixed with a little time and some of the materials you have in the house. First, verify that the batteries have been correctly installed and that the indentation on the back of the button has been filled. Then, open the remote with care and examine the circuit board. Examine for signs of rust or other signs the buttons are damaged or worn out. For instance, conductive paint may be missing. Use a Q-tip, dipped in alcohol to gently clean any membrane contact that is damaged or where conductive paint is missing. Avoid rubbing car remote key repair because this could damage the conductive paint and stop the button from firing when it is the button is pressed. Also, carefully check the battery connector's terminals for a loose solder connection. Soldering them back to their original position will restore the button's functionality if this is the case. You can follow the same procedure to restore functionality to any other loose connection within the fob. In the end, if any of the buttons made of rubber on the front of the key fob have stopped working or require a hard press to work, it is likely that the graphite disks that are on the back of the button are wearing down and need to be replaced. It is usually done by rubbing a pen across the disks. This should bring the button to life. If none of these solutions work, or if you still are unable to 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 cleaning and re-soldering the button but you should also have an extra in case it does not work. Circuitry The circuit board of the remote control could be dirty regardless of whether the buttons on the key fob function or not. This issue can be fixed through a thorough examination. The most frequent causes of dirty circuit boards are water and broken cases. A damaged case could let water and other debris to get into the circuit board, which can cause it to short out. Water can also destroy pins and connectors on the board, which are known as via's. If you're able to remove your key fob, and you're not afraid of some mess, we can de-solder the buttons and put new ones in their place. Also, you should check the connections between battery terminals. They can become extremely dirty and if they're loose the buttons may not work or even stick in their down position. Soldering the terminals and buttons back into place is typically all that's required to return keys that are not in working order. Non-Remote Transponder Chips The non-remote chips sealed in a sealed case are more durable than remote fobs, but they are susceptible to breaking in the event of a hole being drilled in them, or if a car door handle or lawnmowers is pushed over them. Fuse failures are usually the cause of non-remote chip failures. If you're handy enough to open up a key fob that is sealed and are willing to put up with the mess, you can take off the circuit board and check the fuse with an instrument to verify diode function. If you're not confident doing this, go to your local hardware store or Oreilly's, and they will usually have a radio frequency tester that can let you know whether the key fob is sending a signal. Programming Key fobs are not indestructible and are susceptible to being damaged by a lot of things. They may lose their connection to the car's receiver due to shock or low battery, which calls for the reprogramming. A professional auto locksmith, or main dealer can reprogram your key fob and get it back functioning again. In the event that resetting and repairing your key fob fails it may be time to replace it entirely.