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 just a few steps. The first step is to be sure that it's not your backup remote.
If your backup remote can lock and unlock the doors of your vehicle, it is likely that the main remote isn't working. Most problems with car remote keys result from battery or circuitry problems.
Battery
The battery inside the key fob could be worn out over time. It is quite simple to change out the battery, however it is important to make sure that you choose the correct type and you can consult the owner's manual or talk to the dealer of the manufacturer to find out what kind of battery you require. It's also a good idea to inspect the battery compartment thoroughly because dead batteries can leak caustic chemicals that can damage the remote. If changing the batteries doesn't solve the issue, it may be that there are other issues that require professional attention. If the buttons are stuck or broken, for example it might be necessary to take the remote apart and rework each component. key repair near me could also try reprogramming the vehicle to recognize the new fob.
Buttons
Key fobs can get dirty and worn out from repeated use. This is not uncommon however, it can cause buttons to cease working or require a very difficult press to get them to work. This can be a huge hassle particularly if you're away from home and you need to start your car. Even malfunctioning or worn-out buttons are often fixable with a little time and materials you already have at home.
First, make sure the batteries are up correctly and that the indentation on the back of the button is filled. Then, carefully open the remote and examine the circuit board. Look for evidence of rust, or other indications that the buttons are damaged or worn out. For instance, conductive paint may be missing. Use a Q-tip that has been dipped in rubbing alcohol to gently clean any membrane contact that is damaged or has conductive paint missing. Don't rub too hard in order to damage the conductive paint, and block the button from firing when you press it.
Also, carefully check the battery connector terminals for a loose solder connection. If this is the case, connecting them back can restore function to the button. You can follow the same process to restore functionality to any other loose connection inside the fob.
If any of the rubber buttons on the front of the keyfob aren't working or need to be pressed extremely hard the graphite disks at the back of the button could have worn out and require replacement. You can usually do this by rubbing a pen across the disks. This will bring the button back to life.
If none of this is useful or if the button doesn't respond to a hard push, then it may be the case that the circuit board itself has gone bad. It is possible to fix this with a quick clean and refitting, but it's ideal to have a spare fob on hand in the event that this method doesn't work for you.
Circuitry
The circuit board in the remote control could be dirty regardless of whether the buttons on the key fob function or not. A thorough inspection is usually enough to fix this problem. The most common causes for dirty circuit boards are water and broken cases. A damaged case can allow water and other debris to pass through and short out the electronic components. Water can also destroy pins and connectors that are small on the board called via's.
If you're able to open up your key fob and don't mind a little mess, we can take off the buttons and then solder new ones in their place. It's also worth looking at the battery terminal connections. They can get very dirty and if they're loose, the buttons may not work or may even remain in their down position. Soldering the terminals and buttons to their original positions is often enough to restore a non-working fob to a working condition.
Non-Remote Transponder Chips
The sealed non-remote chips are more durable than their remote fobs. However, they can be cracked when a hole is made in them, or if a car door handle or lawnmowers is pushed over them. Failures of the fuse are typically the cause of non-remote chip failures.
If you're handy enough to open up the sealed key fob and are willing to put up with the mess, you can easily remove the circuit board and test the fuse using an instrument to verify diode function. If you're not comfortable with this, you can visit your local Oreilly or hardware store and test their RF frequency tester. This will let you know whether the key fob transmits 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 a low battery, requiring them to be reprogrammed. A professional auto locksmith or dealer will be able to reprogram your key fob to get it back up and running. If, in the unlikely event that resetting and repairing your key fob doesn't work it may be time to replace it completely.