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How to Fix a Key Fob That isn't Working

If your key fob doesn't work and you're not sure why, you can fix it by following some simple steps. First, ensure that it's not your backup remote.

If the backup is able to lock and unlock your car door, then there is likely an issue with the main remote. The majority of car remote key repairs near me keyless entry repair (this content) key malfunctions are caused by circuitry or battery issues.

Battery

The battery inside the key fob could get worn out over the course of time. It is simple to replace a battery. However, it is important that you choose the right type. You can refer to your owner's manual or call the manufacturer to find out the right kind. It's recommended to examine the battery compartment with care since dead batteries may leak caustic chemicals that can harm the remote. If replacing the battery does not solve the issue there may be additional issues that require attention from a professional. For instance, if buttons appear stuck or damaged It may be necessary to take the remote apart and rebuild its components. You can also try reprogramming your vehicle to recognize the new key fob.

Buttons

Through repeated use, key fobs may wear out and become dirty. It is not uncommon for buttons to stop working, or to require a hefty press to get them working. This can be very frustrating particularly when you're away from home and you need to turn on your car. Fortunately, even worn-out or broken car key repair buttons can usually be fixed with a bit of time and a few items you might already have in the house.

First, check that the batteries have been correctly installed and that the indentation on the back of the button is filled. Take the remote apart and examine the circuit board. Examine for evidence of rust, or other indications that the buttons have been damaged or worn out. For example, conductive paint may be missing. Utilizing the Q-tip, dipped in alcohol to gently clean any membrane contacts that are damaged or have conductive paint missing. Don't rub too hard in order to damage the conductive paint and prevent the button from firing when it is pressed.

Also, make sure to inspect the battery connector's terminals to ensure any loose solder connections. Soldering them back into place will restore the button's functionality if this is the situation. The same method can be used to restore function to any other loose connections within the fob.

If any of the rubber buttons located at the front of the keyfob aren't working or require being pressing very hard the graphite disks on the back of the button might have worn out and need to replaced. This is usually done by rubbing a pencil over the disks, which will bring the button back to life.

If all of this doesn't help or if the button still doesn't respond to a firm press, then it may be the case that the circuit board has gone bad. It is possible to fix the issue by cleaning and re-soldering the button but you should also have another spare in case it does not work.

Circuitry

If the keys fob buttons are functioning the circuit board that is inside your remote may be dirty. A very thorough inspection is usually enough to fix this problem. The most common causes of dirty circuit boards are water and damaged cases. A broken case allows water and other debris to pass through and short circuit the electronics. Water can also get through pins and vias, which are tiny connectors that are found on the board.

If you're skilled enough to open your key fob, and you don't mind making an mess, you can take the buttons out of their sockets and then solder new ones. It's also worth checking the battery terminal connections. They can become very dirty and if they're loose the buttons may not work or even stick in their down position. Soldering the terminals and button's back in place is usually all it takes to restore keys that are not in functioning condition.

Non-Remote transponder chips

The sealed non-remote chips are more durable than their remote key repairs fobs, however they can be cracked if a hole is drilled in them or when a door handle for a car or lawnmowers plows over them. The failure of the fuse is usually to blame for non-remote chips failures.

If you're not comfortable opening the key fob, take the circuit board off and use a multimeter to check that the diode is functioning correctly. If you're unsure about doing this, go to your local hardware store or Oreilly's and they usually have a RFID frequency tester that can tell you whether the key fob sending signals.

Programming

Key fobs are subject to a lot of abuse and aren't completely indestructible. They can lose their pairing with the receiver inside your vehicle due to shocks or a low battery, which calls for the reprogramming. A professional auto key repair near me locksmith or a main dealer can reprogram your key fob and get it functioning again. If resetting or repairing your key fob fails it may be necessary to replace it.