How to Fix a Key Fob That isn't Working

If your key fob doesn't work, you can fix it with some simple steps. First, ensure that it's not your backup remote.

If the backup can lock and unlock your car doors, it is most likely an issue with the primary remote. The most common causes for car key repair service remote key failure are circuitry or battery issues.

Battery

It is not unusual to find a battery on a key fob for cars to wear out. It is quite simple to replace batteries, Car key repairs near me but it is essential to ensure you select the correct one and you can consult your owner's manual, or contact the dealer for the manufacturer to find out what kind of battery you need. It is also a good idea to examine the battery compartment carefully since dead batteries may leak caustic chemicals that can cause damage to the remote. If changing the batteries does not solve the problem it could be because there are other issues that require attention by a professional. For instance, if the buttons appear stuck or damaged, it may be necessary to take the remote apart and rework its components. You could also try reprogramming your vehicle to recognize the new key fob.

Buttons

Through frequent use, key fobs can become worn and dirty. This is not unusual however, it can cause buttons to cease functioning or require a long press to work. This can be very frustrating especially if you're out of town and need to start your vehicle. Even worn-out or malfunctioning buttons are often fixable with a little effort and tools you already have at home.

First, verify that the batteries have been correctly inserted and that the indentation on the back of the button is filled. Then, carefully open up the remote and examine the circuit board. Check for signs of corrosion or other indications that buttons are worn out or damaged, such as missing paint that is conductive. Use a Q-tip that has been dipped in rubbing alcohol, gently clean any membrane contacts that have become damaged or have conductive paint missing. Avoid rubbing too hard, because this could damage the conductive painting and prevent the button from firing when it is it is pressed.

Also, be sure to check the battery connector's terminals to ensure an unattached solder connection. If this is the case, connecting them back may restore function to the button. The same method can be used to restore function to any other loose connections within the fob.

In the end, if any of the buttons made of rubber on the front of the key fob have stopped functioning or require a hard press to work it is likely that the graphite disks at the back of the button are deteriorating and need to be replaced. This can usually be done by rubbing a pencil across the disks. This should bring the button back to its original state.

If none of these solutions work, or if you still not be able to get the button respond when pressed hard, it is possible that the circuitry has failed. It is possible to fix this by a quick clean and re-soldering, but it is recommended to have an additional fob on hand in the event that this method fails for you.

Circuitry

The circuit board in your remote control may be dirty, regardless of whether the buttons on the key fob function or not. A thorough inspection will usually resolve this issue. Water and broken cases are the most common causes of dirty boards. A damaged case can let water and other debris to enter the circuit board, which can cause it to short. Water can also get through pins and vias, which are the tiny connectors that are found on the board.

If you're skilled enough to open your key fob and don't mind making an mess, you 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 function properly or become stuck in their down position. Soldering the terminals, and putting the button back in place is usually all that's needed to return the key fob that is not working to working condition.

Non-Remote transponder chips

The sealed non-remote chips are more durable than their remote fobs, however they are susceptible to cracking if a hole is drilled into them or if a Car Key Repairs Near Me door handle or lawnmower runs over them. The failure of the fuse is usually to blame for non-remote chips failures.

If you're able to open up a key fob that is sealed 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 sure with this, you can go to your local Oreilly or hardware store and test their RF frequency tester. This will let you know whether the key fob transmits a signal.

Programming

Key fobs are subject to lots of abuse and aren't impervious to damage. They can break their connection with the receiver in your vehicle due to shocks or a low battery, requiring reprogramming. A professional auto key repair locksmith or dealer will be able to reprogram your key fob to get it functioning again. If, in the unlikely event that resetting and fixing your key fob fails, it could be time to replace it entirely.