How to Fix a Key Fob That isn't Working

If your key fob does not work then you can fix it with some simple steps. First, ensure that it's not the backup remote.

If the backup is able to lock and unlock your car key immobiliser repair doors then there is likely an issue with the main remote. Most car key and repair remote key failures result from battery or circuitry problems.

Battery

It is not uncommon for the battery inside the key fob for cars to wear out. It is quite simple to change out a battery, although it is crucial to ensure you use the right type that you can refer to the owner's manual or talk to the dealer for the manufacturer to determine the type of battery you need. It is also essential to examine the battery compartment, as batteries that are not working properly can release caustic chemicals which can damage the remote. If replacing the battery does not fix the problem there could be other issues that require attention from a professional. For example, if buttons seem stuck or broken, it may be necessary to disassemble the remote and rework its parts. You can also try reprogramming your vehicle to recognize the new key fob.

Buttons

Key fobs can become dirty and worn-out from repeated use. This is not unusual however, it can cause buttons to stop functioning or require a long press to function. This can be very frustrating especially if you're away from home and need to start your repair car keys. Even worn-out or malfunctioning buttons are often fixable with a bit of time and materials you already have at home.

First, make sure that the batteries are correctly installed and that the indentation on the back of the button has been filled. Take the remote apart and inspect the circuit board. Check for indications of rust or other signs the buttons are worn or damaged. For instance, conductive paint may be missing. Use a Q-tip, dipped in rubbing alcohol to gently clean any membrane contact that has become damaged or has conductive paint missing. Do not rub too vigorously in order to damage the conductive paint and stop the button from firing when you press it.

Examine the battery connector's terminals for loose solder connections. Soldering them back into place can restore the button's functionality If this is the case. You can follow the same process to restore functionality to any other loose connection in the fob.

If, for instance, any of the buttons made of rubber that are on the front of the key fob stop functioning or require a hard press to work it is likely that the graphite disks that are on the back of the button are wearing down and need to be replaced. This can be done by rubbing a pencil across the disks. This should bring the button back to its original state.

If none of these solutions work, or if you still not be able to get the button respond when pressed hard, it could be that the circuitry has failed. It is possible to fix this by cleaning and re-soldering the button, but you should have another spare in case it does not work.

Circuitry

Whether or not the key fob buttons function, the circuit board inside your remote may be dirty. A thorough inspection is usually enough to fix this issue. The most common causes for dirty circuit boards is water and broken cases. A damaged case allows water and other debris to pass through and short out the electronic components. Water can also damage pins and vias, which are the tiny connectors found on the board.

If you're able to open your key fob, and aren't afraid of making a mess, we can remove the buttons from their sockets and then solder new ones. It's also worth checking the battery terminal connections. They can become very dirty and if they're loose the buttons might not work or may even remain in their down position. Soldering the terminals and buttons back in their place is generally all it takes to restore the key fob that is not working to working order.

Non-Remote transponder chips

Sealed non-remote transponder chips are more durable than remote fobs that have them but they can be damaged by a hole that is that is drilled into them or over by a lawnmower or door handle for a Car remote key repair shop near me. Failures of the fuse are typically the cause of non-remote chip failures.

If you're handy enough to open the sealed key fob and are able to bear the mess, you can easily remove the circuit board and test the fuse using an instrument to verify diode function. If you don't feel comfortable with this, you can go to your local Oreilly or hardware store and utilize their RF frequency tester. This will let you know whether the key fob is sending a signal.

Programming

Key fobs are subject to lots of abuse and aren't completely indestructible. They can lose their pairing with the receiver inside your vehicle due to shocks or a low battery, requiring the reprogramming. A professional auto locksmith or main dealer will be able to reprogram your key fob to get it working again. In the event that resetting and fixing your key fob fails it may be time to replace it entirely.