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How to Fix a Key Fob That isn't Working
If your key fob isn't working 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 cannot unlock and lock the doors of your car, it is likely that the primary remote is not working. The most common causes of key malfunctions for car remotes are battery or circuitry issues.
Battery
The battery inside a key fob can wear out over time. It is easy to replace batteries. However it is crucial that you choose the right kind. You can refer to your owner's guide or contact the manufacturer to determine the correct type. It is recommended to inspect the battery compartment with care since dead batteries may release caustic chemicals that could harm the remote. If changing the batteries doesn't solve the issue it could be because there are other issues that require attention from a professional. If the buttons are damaged or stuck, for example it could be necessary to remove the remote and rebuild each component. You could also try reprogramming the vehicle to recognize the new device.
Buttons
Key fobs can become filthy and worn out due to frequent use. It is not uncommon for buttons to stop working, or to require a long push to make them work. This can be a hassle particularly when you're away from your home and need to turn on your car. Fortunately, even worn out or damaged buttons can be fixed with just a bit of time and a few materials you may already have around the home.
First, ensure that the batteries are properly charged and that the indentation on the back of the button is filled. Open the remote carefully and examine the circuit board. Check for signs of corrosion or other signs that buttons are worn out or damaged, like missing paint that is conductive. Use a Q-tip that has been dipped in alcohol to gently clean any membrane contact that has become worn-out or where conductive painting is missing. Avoid rubbing too hard since this could cause damage to the conductive painting and prevent the button from firing when it is pressed.
Also, make sure to inspect the battery connector terminals for an unattached solder connection. Soldering lock and key repair near me in place 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 in the fob.
If any of the rubber buttons at the front of the keyfob isn't working or require being press very hard, the graphite disks at the back of the button may have worn out and will require replacement. This can be done by rubbing a pencil across the disks. This should bring the button back to working.
If all of this doesn't help or if the button doesn't respond to a firm press, then it may be that the circuit board itself is damaged. key repair service is possible to fix this with a quick clean and re-soldering, but it is ideal to have a spare fob on hand in the event that this method does not work for you.
Circuitry
Whether or not the key fob buttons function the circuit board in your remote may be dirty. A thorough inspection will usually resolve this problem. Broken and damaged cases are the most common causes of boards that are dirty. A damaged case could allow 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 tiny connectors found on the board.
If you are handy enough to open your key fob and aren't afraid of making some mess, we can remove the buttons from their sockets and then solder new ones. It's also worth checking 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 needed to return a non-working key fob to working order.
Non-Remote Transponder Chips
Sealed non-remote transponder chips are more durable than the remote fobs that have them but they can be broken by a hole being made in them or pushed over by a lawnmowers blade or car door handle. Failures of the fuse are typically to blame for non-remote chip failures.
If you are not comfortable opening the key fob, you can remove the circuitboard and utilize a multimeter to verify that the diode is operating correctly. If you don't feel comfortable with this, you can go to your local Oreilly or hardware store and test their RF frequency tester. This will tell you whether the key fob transmits an RF signal.
Programming
Key fobs are subject to lots of abuse and aren't completely indestructible. They can break their connection with the receiver in your vehicle due to shocks or low battery, requiring reprogramming. A professional auto locksmith, or a dealer in the main, can reprogram your key fob and get it back working again. If resetting or repairing the keyfob is not working it may be necessary to replace it.