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How to Fix a Key Fob That isn't Working

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

If your backup remote is unable to unlock and lock and key repair near me the doors of your car, then it is likely that the main remote is not working. The most common causes of key malfunctions for car remotes are battery or circuitry issues.

Battery

The battery inside the key fob may wear out over time. It is easy to replace batteries. However it is crucial to select the right kind. You can consult your owner's manual or call the manufacturer to inquire about the correct type. It's recommended to inspect the battery compartment carefully, as dead batteries sometimes release caustic chemicals that could harm the remote. If changing the battery doesn't solve the issue, there may be other issues that require attention from a professional. If buttons are stuck or broken for instance, it may be necessary take the remote apart and rework each component. You can also try reprogramming the vehicle to recognize the new device.

Buttons

Key fobs can get filthy and worn out due to repeated use. This is not unusual however, it can cause buttons to cease working or require a difficult press to get them to work. This can be very frustrating particularly when you're away from your home and have to start your car. Fortunately, even worn-out or malfunctioning buttons can often be fixed with a bit of time and some of the materials you might already have in the house.

First, check that the batteries have been correctly inserted and that the indentation at the back of the button has been filled. Then, open the remote with care and examine the circuit board. Check for signs of corrosion or other signs that the buttons are worn or damaged, like missing paint that is conductive. Then, using the Q-tip, dipped in alcohol to gently clean any membrane contacts that have become damaged or where conductive paint is missing. Do not rub too vigorously as this can damage the conductive paint and prevent the button from firing when pressed.

Check the battery connector terminals for loose solder connections. If this is the case, connecting them back can restore functionality to the button. You can use the same process to restore functionality to any other loose connection inside the fob.

If any of the rubber buttons located at the front of the keyfob aren't working or need to be pressing extremely hard, the graphite disks at the back of the button could have worn out and will require replacement. This can be done by rubbing a pencil over the disks, which should bring the button back to working.

If none of this is useful, or if the button does not respond to a firm press, then it may be because the circuit board itself is damaged. It is possible to fix the issue by cleaning and re-soldering your fob however, you should have an extra in case it does not work.

Circuitry

If the keys fob buttons are functioning the circuit board in your remote may be dirty. A thorough inspection will usually resolve this issue. The most frequent causes of dirty circuit boards are water and damaged cases. A damaged case can let water and other debris to get into the circuit board, which can cause it to short. Water can also eat away at pins and connectors on the board, which are known as via's.

If you're handy enough to open your key fob and aren't afraid of some mess, we can de-solder the buttons and put new ones in their place. It's also worth looking at the battery terminal connections. They can become very filthy and if they're not tight enough, 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 working.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are more durable than the remote fobs they are contained in, however they are still susceptible to being damaged by a hole that is that is drilled into them or over by a lawnmower or Car key fob repair near me door handle. Most of the time non-remote transponder chip failures can be attributed to an exploded fuse.

If you are not comfortable opening the key fob, you may remove the circuitboard and use a multimeter to determine if the diode is operating properly. If you don't feel comfortable 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 transmits an RF signal.

Programming

Key fobs take a lot of abuse and aren't impervious to damage. They may lose their connection with the receiver in your vehicle because of shocks or a low battery, requiring reprogramming. A professional auto locksmith or main dealer can reprogram your key fob to get it functioning again. If, in the unlikely event that resetting and fixing your key fob isn't working it may be time to replace it entirely.