How to Fix a Key Fob That isn't Working

If your key fob won't work, you can fix it with a few simple steps. The first step is to make sure it's not the backup remote.

If the backup remote is able to lock and unlock your car doors, it is most likely an issue with the main remote. The majority of repair car key fob remote key malfunctions are caused by circuitry or battery problems.

Battery

It is not uncommon for the battery in a car key fob to get worn out. It is easy to replace a battery. However it is crucial that you choose the right kind. You can consult your owner's manual or call the manufacturer to inquire about the right kind. It's also a good idea to examine the battery compartment thoroughly since dead batteries may release caustic chemicals that could cause damage to the remote. If replacing the batteries doesn't solve the issue it could be that there are other issues that require professional attention. If the buttons are broken or stuck, for example, it may be necessary disassemble the remote and rework each component. It is also possible to reprogramme the vehicle to recognize the new remote.

Buttons

Through frequent use, key fobs could get dirty and worn. It is not common for buttons to cease functioning, or require a hard push to make them work. This can be very frustrating particularly if you're away from home and need to start your vehicle. Even broken or damaged buttons can be fixed with a bit of time and tools you already have at home.

First, check that the batteries are correctly placed and that the indentation at the back of the button is filled. Open the remote carefully and look over the circuit board. Check for signs of rust or other signs the buttons are damaged or worn. For example there could be conductive paint missing. Use a Q-tip, dipped in alcohol to gently clean any membrane contact that has worn out or where conductive paint is missing. Be careful not to rub too hard, because this could damage the conductive painting and prevent the button firing when it is pressed.

Also, make sure to inspect the battery connector's terminals to ensure any loose solder connections. Soldering them back into place can restore the button's functionality if this is the case. You can use the same process to restore functionality to any other loose connection in the fob.

In the end, if any of the buttons made of rubber that are on the front of the key fob aren't working or require a very hard press to work, it is likely that the graphite disks at the back of the button are wearing down and require replacement. It is usually done by rubbing a pen across the disks. This should bring the button back to life.

If all of this doesn't help or repair if the button still doesn't respond to a hard press It could be because the circuit board is damaged. This can sometimes be repaired with a quick clean and replacing the solder, but it is best to have an extra fob on hand in the event that this method fails for you.

Circuitry

If the keys fob buttons are functioning, the circuit board inside the remote could be dirty. This problem can be resolved through a thorough examination. The most frequent causes of dirty circuit boards are water and damaged 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 eat through pins and vias, which are small connectors that are found on the board.

If you're able to open your key fob, and you don't mind making an mess, you can take the buttons out of their sockets and then solder new ones. It's also worth looking at the battery terminal connections. They can become extremely dirty and if they're loose the buttons might not work or may even remain in their down position. Soldering the terminals and button's back in place is usually all it takes to restore the key fob that is not working to functioning condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are more durable than remote fobs they are contained in, but they can still be cracked by a hole made in them or pushed over by a lawnmower or car remote key repair door handle. Most of the time, non-remote transponder chip failures can be blamed on blowing fuses.

If you're handy enough to open the sealed key fob and are able to bear the mess, you can remove the circuit board and test the fuse with an instrument to verify diode function. If you're not confident doing this, visit your local hardware store or Oreilly's, and they usually have a radio frequency tester that can let you know whether the repair key fob fob is sending signals.

Programming

Key fobs are subject to many abuses and aren't impervious to damage. They may lose their connection with the receiver in your vehicle due to shocks or a low-battery, which requires changing the program. A professional auto key repair near me locksmith or a main dealer can reprogram your key fob and get it back up and running. If, in the unlikely event that resetting and repairing your key fob isn't working it could be the time to replace it entirely.