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How to Fix a Key Fob That isn't Working

If your key fob does not work then you can fix it by following a few simple steps. First, check to make sure it's not your backup remote.

If the backup can lock and unlock your car doors, then there's a likely issue with the main remote. The most common causes of key problems with your car remote are issues with the circuitry or battery.

Battery

The battery inside a key fob can wear out over time. It is quite simple to change out the battery, however it is crucial to ensure that you select the correct one that you can refer to the owner's manual or talk to the dealer of the manufacturer to find out the kind of battery you need. It is also important to check the battery compartment as dead batteries can leak caustic chemicals which can damage the remote. If replacing the battery does not fix the issue there could be other issues that require professional attention. If buttons are damaged or stuck, for example it could be necessary to disassemble the remote and rework each component. You could also try reprogramming your vehicle to recognize the new key fob.

Buttons

From repeated use, key fobs can get dirty and worn. This is not atypical however, it can cause buttons to cease working or require a very long press to function. This can be a hassle, especially when you are away from home and have to turn on your car. Even broken or damaged buttons are often fixable with a little effort and the tools you already have at home.

First, check that the batteries are up correctly and that the indentation on the back of the button is filled. Open the remote carefully and inspect the circuit board. Look for indications of rust or other signs the buttons are damaged or worn out. For instance, conductive paint may be missing. Then, using a Q-tip that has been dipped in rubbing alcohol, gently clean any membrane contacts that are worn or where conductive paint is missing. Do not rub too vigorously as this can damage the conductive paint and prevent the button from firing when pressed.

Also, be sure to check the battery connector's terminals for a loose solder connection. Soldering them back into place can restore the button's functionality in the event that this is the case. The same process can be used to restore function to any other loose connections within the fob.

If any of the rubber buttons at the front of the keyfob are not working or need to be pressed very hard the graphite disks on the back of the button may have worn out and require replacement. This is usually done by website rubbing a pencil on the disks. here This should bring the button back to life.

If none of this is helpful or if the button still does not respond to a hard push, then it may be because the circuit board itself is damaged. This can sometimes be repaired with a quick clean and replacing the solder, but it is best to have an extra fob available in the more info event this method doesn't work for you.

Circuitry

Whether or not the key fob buttons function the circuit board in your remote may be dirty. A thorough examination will usually resolve this problem. Water and broken cases are the most frequent causes get more info of boards that are dirty. A damaged case could allow water and other debris into the circuit board, which can cause it to short. Water can also damage pins and vias, which are tiny connectors that are found on the board.

If you're able to open up your key fob and don't mind some mess, we can remove the solder from the buttons and put new ones in their place. Also, you should check the connections between battery terminals. They can become extremely filthy and if they're not tight enough, the buttons might not work or may even remain in their down position. Soldering terminals and buttons back to their original positions is often enough to return a malfunctioning here fob to a working condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chip are more durable than remote fobs that have them but they can be cracked by a hole made in them or pushed over by a lawnmowers blade or car door handle. Failures of the fuse are typically to blame for non-remote chips failures.

If you're not comfortable opening the key fob, you may remove the circuitboard and use a multimeter to verify that the diode is functioning properly. If you're not comfortable with this, go to your local Oreilly or hardware store and test their RF frequency tester. This will tell you whether the key fob is sending an RF signal.

Programming

Key fobs aren't impervious to destruction and are susceptible to damage by a variety of factors. They may lose their connection to the receiver in your car due to shock or low battery, which calls for them to be reprogrammed. A professional auto locksmith, or a dealer in the main can reprogram the keyfob to get it functioning again. In the event that resetting or repairing your key fob isn't working, it could be time to replace it completely.

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