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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 a few simple steps. First, make sure that it's not your backup remote.

If the backup can lock and unlock your car doors, then there is likely an issue with the primary remote. Most car remote key failures result from circuitry or battery problems.

Battery

It is not unusual to find a battery on a repair car remote control key key (samkwang.eowork.co.Kr) fob for cars to wear out. It is simple 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 find out the right kind. It is also a good idea to inspect the battery compartment thoroughly since dead batteries may leak harmful chemicals that can cause damage to the remote. If changing the batteries does not solve the issue it could be that there are other issues that require professional attention. If buttons are broken or stuck, for example, it may be necessary take the remote apart and Repair Key rework each component. It is also possible to reprogramme the vehicle to recognize the new remote.

Buttons

Due to frequent use, key fobs could become worn and dirty. It is not uncommon for buttons to cease functioning, or require a long push to make them work. This can be very frustrating particularly when you're away from home and need to start your car. Fortunately, even worn out or broken buttons can usually be fixed with a little time and a few items you have in the house.

First, verify that the batteries have been correctly placed and that the indentation on the back of the button is filled. Then, carefully open the remote and inspect the circuit board. Examine for signs of rust or other signs that the buttons are worn or damaged, like missing paint that is conductive. Use a Q-tip dipped into alcohol to gently clean any membrane contact that is worn out or where conductive paint is missing. Avoid rubbing too hard since this could cause damage to the conductive painting and prevent the button from firing when pressed.

Check the battery connector's terminals for loose solder connections. Soldering them back into place will allow the button to function again in the event that this is the situation. You can follow the same process to restore functionality to any other loose connection in the fob.

In the end, if 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 deteriorating and require replacement. It is usually done by rubbing a pencil over the disks. This should bring the button back to life.

If none of this is helpful or if the button doesn't respond to a hard press, then it may be that the circuit board itself is damaged. It is possible to fix this by cleaning and re-soldering the button however, you should have an extra in case it doesn't work.

Circuitry

If the keys fob buttons are functioning, the circuit board inside the remote could be dirty. This issue can be fixed through a thorough examination. The most frequent causes of dirty circuit boards are water and damaged cases. A damaged case could let water and other debris to get into the circuit board, which can cause it to short. Water can also get through pins and vias, which are tiny connectors found on the board.

If you're able to open your key fob, and aren't afraid of making a mess, we can remove the buttons from their sockets and then solder new ones. Also, you should check the connections between the battery terminals. If they're loose, the buttons might not work or even become stuck in their down position. Soldering the terminals, and putting the button back in place is usually all that's required to return keys that are not in functioning condition.

Non-Remote transponder chips

The non-remote chips that are sealed are more durable than remote fobs, but they can be cracked if a hole is drilled into them or in the event that a door handle of a car or lawnmower runs over them. Failures of the fuse are typically the cause of non-remote chip failures.

If you are not comfortable opening the key fob, remove the circuitboard and use a multimeter to determine if the diode is operating properly. If you're not comfortable doing this, go to your local hardware store or the Oreilly's and they usually have a radio frequency tester that can determine whether the key fob sending signals.

Programming

Key fobs aren't impervious to destruction and can be damaged by a variety of factors. They may lose their connection with the receiver inside your vehicle due to shocks or a low battery, which calls for changing the program. A professional auto locksmith or main dealer can reprogram your key fob and get it functioning again. If resetting or replacing your keyfob does not work it may be necessary to replace it.