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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, make sure that it's not your backup remote.

If the backup remote is able to lock and unlock your car doors it is most likely an issue with the main remote. Most problems with car remote keys are caused by circuitry or battery problems.

Battery

The battery in the key fob may be worn out over time. It is easy to replace batteries. However it is crucial that you choose the right kind. You can refer to the owner's manual or contact the manufacturer to inquire about the right kind. It is also crucial to inspect the battery compartment, as dead batteries can leak caustic chemicals that can harm the remote. If replacing the batteries doesn't solve the issue it could be because there are other issues that require attention from a professional. For instance, if buttons seem stuck or damaged, it may be necessary to disassemble the remote and rebuild its components. It is also possible to reprogramme the vehicle to recognize the new device.

Buttons

Due to frequent use, key fobs could become worn and dirty. It is not uncommon for buttons to stop functioning, or require a hard press to get them working. This can be a huge hassle especially if you're out of town and need to start your car. Even malfunctioning or worn-out buttons are often fixable with a little effort and the tools you already have at home.

First, ensure that the batteries are up correctly and that the indentation on the back of the button is filled. Open the remote carefully and look over the circuit board. Examine for signs of rust or other indications that the buttons are worn out or damaged, like missing conductive paint. Use a Q-tip that has been dipped in alcohol to gently clean any membrane contact that has damaged or where conductive painting is missing. Avoid rubbing too hard, since this could cause damage to the conductive paint and stop the button from firing when it is the button is pressed.

Examine the battery connector's terminals for loose solder connections. Soldering them back to their original position can restore the button's functionality If this is the situation. The same procedure can be used to restore function to any loose connections inside the fob.

If any of the rubber buttons on the front of the keyfob isn't working or require being press very hard the graphite disks on the back of the button may have worn out and require replacement. This is usually done by rubbing a pencil across the disks, which should bring the button back to its original state.

If none of these solutions work or you are unable to get the button to respond when pressed hard, it is possible that the circuitry is failing. It is possible to fix this with a quick clean and replacing the solder, but it is ideal to have a spare fob in case this method does not work for you.

Circuitry

Whether or not the keys fob buttons are functioning, the circuit board inside your remote may be dirty. A very thorough inspection will usually resolve this problem. The most frequent causes of dirty circuit boards is water and broken cases. A damaged case could allow water and other debris to get into the circuit board, which can cause it to short. Water can also destroy pins and connectors that are small on the board, which are known as via's.

If you are handy enough to open your key fob and aren't afraid of making some mess, we can remove the buttons from their sockets and put in new ones. It's also worth examining the battery terminal connections. If they are loose, the buttons could not function properly or become stuck in their down position. Soldering the terminals, and putting the button back in their place is generally all it takes to restore the key fob that is not working to working order.

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 emergency car key repair door handle or lawnmower runs over them. Fuse failures are usually to blame for non-remote chip failures.

If you're handy enough to open up a key fob that is sealed and are able to bear the mess, you can easily remove the circuit board and examine the fuse with an instrument to verify diode function. If you're not sure with this, you can go to your local Oreilly or hardware store and utilize their RF frequency tester. This will tell you whether the key fob is sending a signal.

Programming

key fob repair service fobs aren't impervious to destruction and are susceptible to being damaged through a variety of causes. They can lose their pairing to the receiver in your car because of shock or a low battery, requiring them to be reprogrammed. A professional auto locksmith, or main dealer can reprogram the keyfob to get it functioning again. In the rarer case that resetting and fixing your key fob fails it may be time to replace it completely.