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How to Fix a Key Fob That isn't Working

If your key fob does not work, you can fix it by following just a few steps. The first step is to make sure that it's not the backup remote.

If your backup remote can unlock and lock the doors of your vehicle, it is likely that the main remote is not working. The most frequent causes of car remote key failure are issues with the circuitry or battery.

Battery

The battery in a key fob can get worn out over the course of time. It is relatively easy to replace a battery, although it is important to ensure you select the correct one and you can consult your owner's manual or contact the dealer of the manufacturer 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 which can damage the remote. If changing the battery doesn't fix the issue there may be additional issues that require professional attention. For instance, if the buttons appear stuck or broken it could be necessary to take the remote apart and rework its components. You could also try reprogramming the vehicle to recognize the new remote.

Buttons

key repairs fobs can get dirty and worn out from frequent use. It is not common for buttons to cease functioning, or require a long press to get them working. This can be frustrating, especially when you are away from home and have to switch on your car key and repair. Even malfunctioning or worn-out buttons can be fixed with a little effort and the tools you already have at home.

First, make sure the batteries are properly charged and that the indentation on the back of the button is filled. Then, carefully open the remote and examine the circuit board. Check for signs of rust or other indications that the buttons are worn or damaged. For instance there could be conductive paint missing. Use a Q-tip that has been dipped in alcohol to gently clean any membrane contacts that have become worn or have conductive paint missing. Avoid rubbing too hard, as this can erode the conductive paint and stop the button firing when the button is pressed.

Also, be sure to check the battery connector's terminals where to repair car key remote ensure a loose solder connection. Soldering them back in place will restore the button's functionality if this is the situation. You can follow the same procedure to restore functionality to any other loose connection within the fob.

If any of the rubber buttons on the front of the keyfob are not functioning or require to be press extremely hard the graphite disks on the back of the button could have worn out and need to replaced. It is usually done by rubbing a pen across the disks. This will bring the button back to life.

If none of these solutions work, or if you still not be able to get the button respond when you press it hard, it is possible that the circuitry is failing. This can sometimes be repaired by a quick clean, and re-soldering, but it is ideal to have a spare fob available in the event this method fails for you.

Circuitry

Whether or not the keys fob buttons are functioning, the circuit board inside your remote may be dirty. A thorough inspection is usually enough to fix this problem. Water and broken cases are the most frequent causes of boards that are dirty. A broken case allows water and other debris to get in and short out the electronics. Water can also destroy pins and connectors on the board, referred to as via's.

If you are handy enough to open your key fob, and you don't mind making an mess, you can take the buttons out of their sockets and put in new ones. It's also worth examining the battery terminal connections. If they're loose, the buttons might not work or even become stuck in their down position. Soldering the terminals and buttons back in place is usually all that's needed to return a non-working key fob to working condition.

Non-Remote Transponder Chips

The non-remote chips sealed in a sealed case are more durable than their remote fobs, but they can be cracked in the event of a hole being drilled in them or when a door handle for a electronic car key repair near me or lawnmowers is pushed over them. Failures of the fuse are typically to blame for non-remote chip failures.

If you're able to open the sealed key fob and can tolerate the mess, you can remove the circuit board and examine the fuse using a multimeter for proper diode function. If you're not comfortable doing this, head to your local hardware store or Oreilly's and they'll usually have a radio frequency tester that can determine whether the key fob is sending a signal.

Programming

Key fobs take lots of abuse and aren't completely indestructible. They may lose their connection to the repair car key remote's receiver because of shock or a low battery, which calls for the reprogramming. A professional auto locksmith or the main dealer can reprogram the keyfob 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.