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How to Fix a Key Fob That isn't Working If your key fob doesn't work, you can fix it with just a few steps. First, check to make sure it's not your backup remote. If the backup can lock and unlock your car door, then there is likely an issue with the main remote. Most car remote key failures result from circuitry or battery issues. Battery It is not uncommon for the battery in the car key fob to wear out. It is easy to replace the battery. However, it is important that you use the correct type. You can check the owner's manual or contact the manufacturer to find out the right type. It is also crucial to inspect the battery compartment, as batteries that are not working properly can release toxic chemicals that could damage the remote. If changing the batteries does not solve the problem, it may be that there are other issues that require attention by a professional. For example, if buttons appear stuck or damaged, it may be necessary to take the remote apart and rework its components. It is also possible to reprogramme the vehicle to recognize the new device. repair car key fob to frequent use, key fobs could become worn and dirty. It is not common for buttons to cease working, or to require a hefty push to make them work. This can be extremely frustrating particularly if you're away from home and you need to start your car. Fortunately, even worn-out or broken buttons can usually be fixed with a bit of time and some of the materials you have in the house. First, ensure that the batteries are properly charged and that the indentation on the back of the button is filled. Then, open the remote with care and examine the circuit board. Look for signs of rust or other indications that the buttons are damaged or worn out. For example there could be conductive paint missing. Use a Q-tip, dipped in alcohol to gently clean any membrane contact that has become worn out or where conductive paint is missing. Do not rub too vigorously in order to damage the conductive paint and prevent the button from firing when pressed. Check the battery connector's terminals carefully for any loose solder connections. Soldering them back in place will allow the button to function again in the event that this is the situation. You can use the same procedure to restore functionality to any other loose connection in the fob. In the end, if any of the buttons made of rubber on the front of the key fob stop working or require a very hard press to work it is likely the graphite disks at the back of the button are deteriorating and require replacement. This is usually done by rubbing a pencil across the disks, which should bring the button back to life. If none of these solutions work, or if you still not be able to get the button respond when you press it hard, it could be that the circuitry is failing. This can be fixed with a quick clean and re-soldering, but it is recommended to have an additional fob available in the event this method does not work for you. Circuitry Whether or not the key fob buttons are working the circuit board in your remote may be dirty. The issue can be solved through a thorough examination. The most frequent causes of dirty circuit boards are water and broken cases. A broken case allows water and other debris to enter and short circuit the electronics. Water can also destroy pins and small connectors on the board, which are known as via's. If you're handy enough to remove your key fob and don't mind making a mess, we can de-solder the buttons and solder new ones in their place. It's also worth checking the battery terminal connections. They can become extremely filthy and if they're not tight enough, the buttons might not function or even stick in their down position. Soldering terminals and buttons back to their proper positions is usually enough to return a malfunctioning fob to working. Non-Remote transponder chips Sealed non-remote transponder chips are more durable than the remote fobs they are contained in, but they can still be cracked by a hole that is drilled into them or over by a lawnmower or door handle for a car. The majority of non-remote transponder chip malfunctions can be attributed to a blown fuse. If you are not comfortable opening the key fob, you may remove the circuitboard and use a multimeter to determine if the diode is operating properly. If you're not comfortable doing this, head to your local hardware store or Oreilly's, and they will usually have a RFID frequency tester that can determine whether the key fob sending signals. Programming Key fobs endure many abuses and aren't indestructible. They can break their connection with the receiver in your vehicle because of shocks or a low battery, which calls for the reprogramming. A professional auto locksmith or main dealer can reprogram your key fob and get it functioning again. In the event that resetting and fixing your key fob doesn't work it may be time to replace it completely.

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