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How to Fix a Key Fob That isn't Working

If your key fob isn't working There are a few simple steps that can be taken to fix it. The first step is to make sure that it's not your backup remote.

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

Battery

The battery in the key fob may wear out over time. It is fairly easy to change out batteries, but it is important to ensure you select the correct one and you can consult your owner's manual, or contact the manufacturer's dealer to find out the kind of battery you need. It is also crucial to inspect the battery compartment, since batteries that are not working properly can release caustic chemicals that can harm the remote. If replacing car key repair service does not fix the issue there may be additional issues that require professional attention. For example, if buttons seem stuck or broken, it may be necessary to disassemble the remote and rebuild its components. You can also try reprogramming your car to recognize the new key fob.

Buttons

Due to repeated use, key fobs can become worn and dirty. This is not unusual, but it can cause buttons to cease working or require a difficult press to get them to work. This can be extremely frustrating particularly if you're away from home and need to start your car. Even malfunctioning or worn-out buttons can be fixed with a little effort and the tools you already have at home.

First, ensure that the batteries are charged correctly and that the indentation on the back of the button is filled. Take the remote apart and examine the circuit board. Examine for indications of rust or other indications that the buttons have been worn or damaged. For instance there could be conductive paint missing. Use a Q-tip dipped into rubbing alcohol to gently clean any membrane contact that is worn out or where conductive paint is missing. Avoid rubbing too hard as this can erode the conductive paint and block the button from firing when pressed.

Also, be sure to check the battery connector's terminals to ensure any loose solder connections. Soldering them back in place can restore the button's functionality If this is the case. The same procedure can be used to restore functionality to any other loose connections in the fob.

If any of the rubber buttons at the front of the keyfob aren't working or need to be pressing very hard the graphite disks on the back of the button may have worn out and will need to replaced. This is usually done by rubbing a pencil on the disks, which should bring the button back to working.


If none of this is useful or if the button still does not respond to a hard push, then it may be the case that the circuit board itself has become damaged. This can be fixed by a quick clean and refitting, but it's ideal to have a spare fob in case this method doesn't work for you.

Circuitry

The circuit board in your remote control may be dirty, regardless of whether the buttons on the key fob are working or not. A very thorough inspection is often enough to resolve this issue. Water and broken cases are the most frequent causes of boards that are dirty. A damaged case can 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 the tiny connectors found on the board.

If you are handy enough to open your key fob, and aren't afraid of making an mess, you can remove the buttons from their sockets and then solder new ones. It's also worth checking the connections between the battery terminals. If they're loose, the buttons might not function properly or become stuck in their down position. Soldering the terminals, and putting the button 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 their remote fobs, however they can be cracked when a hole is made in them or in the event that a door handle of a car or lawnmowers plows over them. Most of the time, non-remote transponder chip malfunctions can be attributed to blowing fuses.

If you are not comfortable opening the key fob, take the circuit board off and use a multimeter to check that the diode is operating properly. If you're unsure about doing this, visit your local hardware store or Oreilly's, and they'll usually have a RFID frequency tester that can determine whether the key fob is transmitting a signal.

Programming

Key fobs aren't indestructible and can be damaged by a lot of things. They can lose their pairing to the car's receiver because of shock or a low battery, which requires the reprogramming. A professional auto locksmith, or the main dealer, can reprogram your keyfob to get it working again. In the event that resetting or repairing your key fob doesn't work, it could be time to replace it all over again.

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