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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. First, ensure that it's not the backup remote.

If the backup is able to lock and unlock your car doors, then there is likely an issue with the primary remote. The most common causes of key malfunctions for car remotes are circuitry or battery issues.

Battery

It is not unusual for the battery in the key fob for cars to degrade. It is easy to replace a battery. However it is essential to select the right kind. You can check your owner's manual or call the manufacturer to inquire about the correct type. It is also important to inspect the battery compartment as dead batteries can leak toxic chemicals that could damage the remote. If replacing the batteries doesn't solve the problem, it may be that there are other issues that require attention by a professional. If the buttons are damaged or stuck, for example it might be necessary to take the remote apart and rework each component. You can also try reprogramming the vehicle to recognize the new key fob.

Buttons

Key fobs may become filthy and worn out due to frequent use. It is not common to have buttons stop working, or to require a hefty press to make them work. This can be very frustrating particularly if you're out of town and need to start your car. Even malfunctioning or worn-out buttons can be fixed with a bit of time and materials you already have at home.

First, check that the batteries are properly inserted and that the indentation on the back of the button is filled. Then, carefully open the remote and examine the circuit board. car key repairs near me for signs of rust or other signs that the buttons are worn out or damaged, such as missing paint that is conductive. Use a Q-tip that has been dipped in rubbing alcohol to gently clean any membrane contact that has damaged or where conductive paint is missing. Be careful not to rub too hard, as this can erode the conductive paint and block the button firing when the button is pressed.


Examine the battery connector's terminals for loose solder connections. Soldering them back in place can restore the button's functionality in the event that this is the situation. The same procedure can be used to restore function to any other loose connections in the fob.

If, for instance, any of the buttons made of rubber on the front of the key fob have stopped working or require a very long press to function it is likely the graphite disks at the back of the button are wearing down and require replacement. You can usually do this by rubbing a pen over the disks. This will bring the button back to life.

If none of these solutions work, or if you still cannot get the button to respond when pressed hard, it is possible that the circuitry has failed. This can sometimes be repaired by a quick clean, and refitting, but it's ideal to have a spare fob in case this method fails for you.

Circuitry

The circuit board of the remote control could be dirty, regardless of whether the buttons on the key fob function or not. A very 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 can let water and other debris to enter the circuit board, which can cause it to short out. Water can also damage pins and vias, which are tiny connectors that are found on the board.

If you're handy enough to remove your key fob, and you're not afraid of a little mess, we can remove the solder from the buttons and then solder new ones in their place. Also, it's worth checking the connections between battery terminals. If they're loose, the buttons may not function or get stuck in their down position. Soldering terminals and buttons back to their proper positions is usually enough to restore a non-working fob back to working.

Non-Remote Transponder Chips

The non-remote chips sealed in a sealed case are more durable than their remote fobs, but they are susceptible to breaking in the event of a hole being drilled in them, or if a car door handle or lawnmower runs over them. Most of the time, non-remote transponder chip failures could be attributed to a blown fuse.

If you're not comfortable opening the key fob, remove the circuitboard and use a multimeter to check that the diode is functioning correctly. If site web don't feel comfortable with this, you can go to your local Oreilly or hardware store and utilize their RF frequency tester. This will tell you whether the key fob sends signals.

Programming

Key fobs endure many abuses and aren't impervious to damage. They may lose their connection with the receiver in your vehicle because of shocks or a low-battery, which requires reprogramming. A professional auto locksmith or dealer can 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 could be the time to replace it all over again.

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