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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 with a few simple steps. The first step is to be sure it's not the backup remote.

If your backup remote can unlock and lock the doors of your car, then it is likely that the main remote isn't working. The most common causes of key malfunctions for car remotes are circuitry or battery issues.

Battery

The battery in a key fob can get worn out over the course of time. It is quite simple to change out the battery, however it is important to make sure that you use the right type and you can consult your owner's manual or contact the manufacturer's dealer to find out what kind of battery you require. It is also crucial to examine the battery compartment as batteries that are not working properly can release caustic chemicals which can damage the remote. If replacing the batteries doesn't solve the problem it could be that there are other issues that require attention from a professional. For instance, if the buttons seem to be stuck or damaged, it may be necessary to disassemble the remote and rework its parts. You can also try reprogramming the vehicle to recognize the new device.

Buttons

From repeated use, key fobs may get dirty and worn. It is not common for buttons to cease working, or to require a hard press to get them working. This can be very frustrating especially when you're away from your 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, check that the batteries are correctly placed and that the indentation on the back of the button is filled. Open the remote carefully and look over the circuit board. Examine for signs of rust or other indications that the buttons are worn or damaged, such as missing paint that is conductive. Utilizing a Q-tip that has been dipped in alcohol, gently clean any membrane contacts that have damaged or where conductive paint is missing. Be careful not to rub too hard, as this can erode the conductive painting and prevent the button from firing when it is pressed.

Also, be sure to check the battery connector's terminals for an unattached solder connection. Soldering them back to their original position can restore the button's functionality If this is the situation. The same procedure can be used to restore function to any other loose connections in the fob.

If any of the rubber buttons located at the front of the keyfob are not working or need to be press very hard the graphite disks at the back of the button might have worn out and will require replacement. This can be done by rubbing a pencil across the disks. This should bring the button back to its original state.

If all of this doesn't help or if the button still doesn't respond to a firm press It could be because the circuit board has become damaged. It is possible to fix this by cleaning and re-soldering the fob, but you should have another spare in case it doesn't work.

Circuitry

If the keys fob buttons are functioning the circuit board that is inside the remote could be dirty. This problem can be resolved by a thorough inspection. The most common causes for dirty circuit boards are water and broken cases. A damaged case check here could allow water and other debris to enter the circuit board, causing it to short out. Water can also damage pins and connectors that are small on the board, referred to as via's.

If you are handy enough to open your key fob, and aren't afraid of making an mess, you can take the buttons out of their sockets and put in new ones. Also, you should check the connections between the battery terminals. If they are loose, the buttons could not function or get stuck in more infocheck here their down position. Soldering the terminals back to their proper positions is usually enough to return a malfunctioning fob to a working condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are much more durable than remote fobs they are contained in, however they are still susceptible to being broken by a hole being made in them or pushed over by a lawnmowers or door handle for a car. The failure of the fuse is usually to blame for non-remote chips failures.

If you're not confident opening the key fob, you can remove the circuitboard and use a multimeter to verify that the diode is functioning correctly. 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 check here signals.

Programming

Key fobs are not indestructible and are susceptible to being damaged by a variety of factors. They can lose their pairing to the receiver in your car due to shock or low battery, which requires them to be reprogrammed. A professional auto locksmith or the read more main dealer can reprogram your keyfob to get it working again. If resetting or repairing the keyfob is not working it is possible to replace it.