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How to Fix a Key Fob That isn't Working

If your key fob doesn't work, a few easy steps can fix it. First, ensure that it's not the backup remote.

If the backup can lock and unlock your car doors, it is most likely an issue with the main remote. The most frequent causes of key malfunctions for car remotes are issues with the circuitry or battery.

Battery

It is not unusual for the battery inside a key fob for cars to degrade. It is easy to replace a battery. However it is crucial that you choose the right kind. You can refer to the owner's manual or contact the manufacturer to inquire about the right type. It is also essential to check the battery compartment as dead batteries can leak caustic chemicals which can damage the remote. If changing the battery doesn't solve the issue, there may be other issues that require professional attention. If buttons are broken or stuck for instance it might be necessary to disassemble the remote and rework each component. You could also try reprogramming the vehicle to recognize the new key fob.

Buttons

Key fobs can become filthy and worn out due to frequent use. It is not unusual for buttons to cease functioning, or require a hard press to get them working. This can be a hassle particularly when you're away from home and have to turn on your car. Fortunately, even worn out or malfunctioning buttons can often be fixed with a little time and a few materials you may already have around the house.

First, check that the batteries are charged correctly and that the indentation on the back of the button is filled. Open the remote carefully and inspect the circuit board. Look for signs of corrosion or other signs that buttons are worn out or damaged, like missing the conductive paint. Use a Q-tip dipped into rubbing alcohol to gently clean any membrane contact that is worn out or where conductive painting is missing. Be careful not to rub too hard, as this can erode the conductive paint and block the button firing when pressed.

Check the battery connector terminals carefully for any loose solder connections. If this is the case, simply soldering them back in place can restore function to the button. The same method can be used to restore function to any loose connections inside the fob.

If, for car key repair near me , any of the buttons made of rubber on the front of the key fob aren't functioning or require a long press to function, it is likely that the graphite disks at the back of the button are wearing out and need to be replaced. This can be done by rubbing a pencil over the disks. This should bring the button back to working.


If none of these solutions work or you not be able to get the button respond when you press it hard, it is possible that the circuitry has failed. It is possible to fix this by a quick clean and re-soldering, but it is ideal to have a spare fob on hand in the event that this method does not work for you.

Circuitry

The circuit board inside your remote control could be dirty regardless of whether the buttons on the key fob work or not. A very thorough inspection is often enough to resolve this issue. The most common causes for dirty circuit boards is water and broken cases. A broken case can let water and other debris into the circuit board, causing it to short. Water can also destroy pins and connectors on the board, referred to as via's.

If you're handy enough to open up your key fob and aren't afraid of some mess, we can de-solder the buttons and solder new ones in their place. Also, it's worth checking the connections between the battery terminals. If they are loose, the buttons might not work or even become stuck in their down position. Soldering terminals and buttons back to their original positions is often enough to restore a non-working fob to a working condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are much more durable than remote fobs that contain them but they can be broken by a hole being that is drilled into them or over by a lawnmowers or door handle for a car. Most of the time non-remote transponder chip failures could be attributed to blowing fuses.

If you're able to remove a key fob that is sealed and are able to bear the mess, you can take off the circuit board and test the fuse with a multimeter to ensure that it is functioning as intended. function. If you're not comfortable doing this, visit your local hardware store or the Oreilly's and they usually have an RFID frequency tester that can tell you whether the key fob sending signals.

Programming

Key fobs endure lots of abuse and aren't impervious to damage. They can lose their pairing to the car's receiver due to shock or a low battery, which calls for the reprogramming. A professional auto locksmith or a main dealer will be able to reprogram your key fob and get it functioning again. In the rarer case that resetting and fixing your key fob doesn't work, it could be time to replace it entirely.

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