How to Fix a Key Fob That isn't Working
If your key fob does not work and you're not sure why, you can fix it with a few simple steps. The first step is to be sure that it's not the backup remote.
If your backup remote cannot unlock and lock the doors of your vehicle, it is most likely that the primary remote is not working. Most car remote key failures are caused by circuitry or battery issues.
Battery
The battery in the key fob may be worn out over time. It is relatively easy to replace the battery, however it is important to ensure that you select the correct one that you can refer to your owner's manual or contact the manufacturer's dealer to determine the type of battery you require. It is also essential to inspect the battery compartment, as dead batteries can leak toxic chemicals that could damage the remote. If changing the battery doesn't fix the issue there may be additional issues that require professional attention. For instance, if the buttons appear stuck or broken it could be necessary to take the remote apart and rebuild its components. You can also try reprogramming your vehicle to recognize the new key fob.
Buttons
Key fobs can become filthy and worn out due to repeated use. This is not uncommon, but it can cause buttons to cease functioning or require a long press to function. car key repair shop near me can be extremely frustrating especially if you're away from home and you need to start your vehicle. Even broken or damaged buttons can be fixed with a little time and tools you already have at home.
First, make sure 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. Examine for signs of rust 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 damaged or where conductive paint is missing. Avoid rubbing too hard because this could damage the conductive paint and stop the button from firing when it is the button is pressed.
Also, make sure to inspect the battery connector's terminals to ensure an unattached solder connection. If this is the case, simply soldering them back in place can restore functionality to the button. You can apply the same method to restore functionality to any other loose connection within the fob.
Finally, if any of the rubber buttons on the front of the key fob aren't working or require a long press to function it is likely that the graphite disks at the back of the button are wearing down and require replacement. This can usually be done by rubbing a pencil over the disks, which will bring the button back to its original state.
If none of this is helpful or if the button doesn't respond to a firm press, then it may be because the circuit board itself has gone bad. This can sometimes be repaired by a quick clean and refitting, but it's recommended to have an additional fob on hand in the event that this method doesn't work for you.
Circuitry
The circuit board inside your remote control may be dirty, regardless of whether the buttons on the key fob function or not. This issue can be fixed by a thorough inspection. Water and broken cases are the most common causes of dirty boards. A damaged case can allow water and other debris to pass through and short circuit the electronic components. Water can also eat away at pins and connectors on the board, which are known as via's.
If you are handy enough to open your key fob and aren't afraid of making some mess, we can take the buttons out of their sockets and then solder new ones. It's also worth examining the battery terminal connections. If they are loose, the buttons could not work or even become stuck in their down position. Soldering the terminals and buttons back in place is usually all it takes to restore a non-working key fob to functioning condition.
Non-Remote Transponder Chips
The non-remote chips sealed in a sealed case are more durable than remote fobs, but they can be cracked in the event of a hole being drilled in them, or if a car door handle or lawnmowers is pushed over them. Most of the time non-remote transponder chip failures can be attributed to an exploded fuse.
If you are not comfortable opening the key fob, you can remove the circuitboard and utilize a multimeter to check that the diode is functioning correctly. If you're not sure with this, visit your local Oreilly or hardware store and use their RF frequency tester. This will let you know whether the key fob is sending signals.
Programming
car key repair shops near me fobs aren't impervious to destruction and can be damaged through a variety of causes. They can break their connection with the receiver inside your vehicle due to shocks or a low-battery, which requires reprogramming. A professional auto locksmith, or main dealer can reprogram your keyfob to get it working again. If resetting or replacing your key fob fails, you may need to replace it.