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How to Fix a Key Fob That isn't Working

If your key repair service fob does not work and you're not sure why, you can fix it with some simple steps. First, make sure that it's not your backup remote.

If your backup remote cannot unlock and lock and key repair near me the doors of your car, then it is likely that the primary remote isn't functioning. Most car remote key failures are caused by circuitry or battery problems.

Battery

The battery in a key fob can wear out over time. It is relatively easy to replace batteries, but it is essential to ensure you select the correct one and you can consult your owner's manual or contact the manufacturer's dealer to find out what kind of battery you need. It is recommended to examine the battery compartment carefully since dead batteries may release caustic chemicals that could harm the remote. If changing the battery doesn't fix the issue there may be additional issues that require attention from a professional. For instance, if buttons seem to be stuck or broken, it may be necessary to disassemble the remote and rework its parts. You can also try reprogramming your vehicle to recognize the new key fob.

Buttons

Key fobs can get dirty and worn out from frequent use. It is not uncommon for buttons to cease functioning, or require a long push to make them work. This can be a huge hassle especially if you're away from home and you need to start your car remote key fob repair. Even worn-out or malfunctioning buttons are often fixable with a little effort and materials you already have at home.

First, make sure the batteries are charged correctly and that the indentation on the back of the button is filled. Then, open the remote with care and examine the circuit board. Examine for indications of rust or other signs the buttons are damaged or worn out. For instance the paint that conducts electricity could be missing. Use a Q-tip, dipped in rubbing alcohol to gently clean any membrane contact that has worn out or where to repair car key remote conductive paint is missing. Do not rub too vigorously as this can damage the conductive paint and prevent the button from firing when it is pressed.

Also, be sure to check the battery connector terminals for an unattached solder connection. If this is the case, reconnecting them may bring back function to the button. You can apply the same process to restore functionality to any other loose connection in the fob.

If, for instance, any of the buttons made of rubber that are on the front of the key fob stop working or require a very difficult press to function it is likely the graphite disks on the back of the button are deteriorating and require replacement. This can usually be done by rubbing a pencil across the disks, which will bring the button back to working.

If none of this is useful or if the button still does not respond to a firm press, then it may be that the circuit board has gone bad. It is possible to fix this issue by cleaning and re-soldering the button however, you should have another spare in case it does not work.

Circuitry

The circuit board inside the remote control could be dirty regardless of whether the buttons on the key fob are working or not. This problem can be resolved through a thorough examination. The most common causes for dirty circuit boards is water and broken cases. A damaged case allows water and other debris to get in and short circuit the electronics. Water can also damage pins and vias, which are small connectors on the board.

If you're skilled enough to open your key fob, and you don't mind making a mess, we can take the buttons out of their sockets and then solder new ones. It's also worth checking the battery terminal connections. They can get very dirty and if they're loose the buttons might not work or even stick in their down position. Soldering the terminals and buttons to their original positions is often enough to restore a non-working fob to a working condition.

Non-Remote transponder chips

The sealed non-remote chips are more durable than their remote fobs, but they are susceptible to breaking in the event of a hole being drilled in them, or in the event that a door handle of a car or lawnmower runs over them. Fuse failures are usually the cause of non-remote chip failures.

If you're not confident opening the key fob, you may take the circuit board off and use a multimeter to check that the diode is functioning correctly. If you're unsure about doing this, visit your local hardware store or Oreilly's and they usually have an radio frequency tester that can tell you if the key fob is transmitting a signal.

Programming

Key fobs are subject to a lot of abuse and aren't completely indestructible. They can lose their pairing to the receiver in your car key and repair due to shock or a low battery, which calls for them to be reprogrammed. A professional auto locksmith or a main dealer can reprogram your key fob and get it functioning again. If resetting or fixing your keyfob does not work it may be necessary to replace it.