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How to Fix a Key Fob That isn't Working

If your key fob does not work, you can fix it with some simple steps. The first step is to be sure that it's not your backup remote.

If your backup remote can unlock and lock the doors of your vehicle, it is likely that the primary remote is not working. The most common causes of key problems with your car remote are issues with the circuitry or battery.

Battery

The battery in a key fob can get worn out over the course of time. It is easy to replace batteries. However it is crucial that you choose the right type. You can consult your owner's manual or call the manufacturer to determine the correct type. It is also important to check the battery compartment as dead batteries can leak caustic chemicals that can harm the remote. If changing the batteries doesn't solve the issue, it may be that there are other issues that require attention from a professional. If the buttons are damaged or stuck, for example it might be necessary to disassemble the remote and rework each component. You can also try reprogramming your car to recognize the new key fob.

Buttons

Key fobs can get dirty and worn-out from repeated use. This is not unusual, but it can cause buttons to stop working or require a very long press to function. This can be extremely frustrating, especially if you are away from home and you need to start your vehicle. Fortunately, even worn out or malfunctioning buttons can often be fixed with a little time and a few materials you have in the home.

First, check that the batteries have been correctly installed and that the indentation at the back of the button has been filled. Then, open the remote with care and inspect the circuit board. Examine for indications of rust or other indications that the buttons have been 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 is damaged or where conductive paint is missing. Avoid rubbing too hard as this can erode the conductive painting and prevent the button firing when it is pressed.

Check the battery connector's terminals carefully for any loose solder connections. If this is the case, simply connecting them back may restore functionality to the button. The same procedure can be used to restore function to any loose connections in the fob.

In the end, if any of the rubber buttons on the front of the key fob aren't working or require a hard press to work, it is likely that the graphite disks at the back of the button are wearing down and need to be replaced. This can usually be done by rubbing a pencil on the disks, which will bring the button back to working.

If none of this is useful or if the button still does not respond to a firm press, then it may be that the circuit board itself has become damaged. It is possible to fix this issue by cleaning and re-soldering the button but you should also have a spare in case it doesn't work.

Circuitry

Whether or not the key fob buttons function the circuit board that is inside your remote may be dirty. This problem can be resolved through a thorough examination. Broken cases and water are the most common causes of dirty boards. A broken case allows water and other debris to get in and short circuit the electronics. Water can also damage pins and vias, which are tiny connectors that are found on the board.

If you're able to open your key fob and you don't mind making some mess, we can remove the buttons from their sockets and solder in new ones. It's also worth looking at the battery terminal connections. If they are loose, the buttons might not work or even become stuck in their down position. Soldering the terminals and buttons back into place is typically all that's needed to return the key fob that is not working to working condition.

Non-Remote transponder chips

The sealed non-remote chips are more durable than remote fobs. However, they are susceptible to breaking in the event of a hole being drilled in them or if a car keys repair near me door handle or lawnmowers plows over them. Most of the time, non-remote transponder chip failures can be attributed to an exploded fuse.

If you're not comfortable opening the key repair shops near me fob, you can remove the circuitboard and use a multimeter to determine if the diode is operating properly. If you don't feel comfortable with this, go to your local Oreilly or hardware store and use their RF frequency tester. This will tell you whether the key fob is sending a signal.

Programming

Key fobs take lots of abuse and aren't impervious to damage. They can lose their pairing with the receiver inside your vehicle due to shocks or low battery, requiring reprogramming. A professional auto key fob repair key, Learn Additional, locksmith or dealer will be able to reprogram your key fob and get it working again. If resetting or fixing your key fob fails, you may need to replace it.