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How to Fix a Key Fob That isn't Working

If your key fob isn't functioning, a few easy steps can be taken to fix it. First, check to make sure it's not your backup remote.

If your backup remote cannot lock and unlock the doors of your car, then it is likely that the primary remote is not working. Most mobile car key repair near me remote key failures result from circuitry or battery issues.

Battery

It is not uncommon to find a battery on the key fob for cars to get worn out. It is relatively easy to change out the battery, however it is important to ensure you use the right type; you can look in your owner's manual or contact the manufacturer's dealer to find out what kind of battery you need. It is also essential to check the battery compartment, since dead batteries can leak caustic chemicals that can harm the remote. If changing the batteries does not solve the problem it could be that there are other issues that require attention by a professional. If buttons are stuck or broken for instance it could be necessary to take the remote apart and rework each component. You could also try reprogramming the vehicle to recognize the new remote.

Buttons

Key fobs may become dirty and worn-out from repeated use. It is not common to have buttons stop working, or to require a hefty push to make them work. This can be a hassle, especially when you are away from home and have to start your car. Even broken or damaged buttons can be fixed with a bit of time and materials you already have at home.

First, verify that the batteries are properly placed and that the indentation at the back of the button is filled. Then, carefully open up the remote and inspect the circuit board. Examine for signs of rust or other indications that the buttons are worn or damaged. For instance, conductive paint may be missing. Utilizing a Q-tip dipped in alcohol, gently clean any membrane contacts that have become damaged or where conductive paint is missing. Don't rub too hard in order to damage the conductive paint and stop the button from firing when it is pressed.

Check the battery connector terminals carefully for any loose solder connections. If this is the case, simply reconnecting them could restore functionality to the button. The same procedure can be used to restore function to any other loose connections in the fob.

If, for instance, any of the buttons made of rubber that are on the front of the key fob aren't working or require a long press to function, it is likely that the graphite disks on the back of the button are wearing out and require replacement. This is usually done by rubbing a pencil over the disks, which will bring the button back to its original state.

If none of these solutions work or you cannot get the button to respond when you press it hard, it is possible that the circuitry is failing. This can be fixed by a quick clean, and refitting, but it's ideal to have a spare fob available in the event this method doesn't work for you.

Circuitry

If the key fob buttons function the circuit board that is inside your remote might be dirty. A thorough inspection is often enough to resolve this problem. The most common causes for dirty circuit boards is water and broken cases. A damaged case can allow water and other debris to get in and short circuit the electronics. Water can also destroy pins and connectors that are small on the board called via's.

If you're handy enough to remove your key fob, and you're not afraid of some mess, we can de-solder the buttons and put new ones in their place. It's also worth checking the connections between battery terminals. If they're loose, the buttons could not function or get stuck in their down position. Soldering the terminals and buttons 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 non-remote chips sealed in a sealed case are more durable than their remote fobs. However, they can be cracked in the event of a hole being drilled into them or in the event that a door handle of a repair key fob car key remote (read the article) or lawnmowers plows over them. The failure of the fuse is usually to blame for non-remote chips failures.

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

Programming

mobile key repair fobs aren't indestructible and can be damaged by a lot of things. They may lose their connection to the car's receiver due to shock or a low battery, which requires them to be reprogrammed. A professional auto locksmith or dealer will be able to reprogram your key fob to get it working again. If resetting or repairing the keyfob is not working it is possible to replace it.