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How to Fix a Key Fob That isn't Working

If your key fob doesn't work, a few easy steps can fix it. The first step is to be sure that it's not the backup remote.

If your backup remote is unable to lock and unlock the doors of your vehicle, it is likely that the primary remote is not working. The most common causes for repair car key remote key failure are circuitry or battery issues.

Battery

The battery inside the key fob could wear out over time. It is simple to replace the battery. However it is crucial to select the right kind. You can refer to your owner's guide or contact the manufacturer to inquire about the right kind. It is also crucial to examine the battery compartment, as dead batteries can leak toxic chemicals that could damage the remote car key repair. If replacing the batteries doesn't solve the problem, it may be that there are other issues that require professional attention. If buttons are stuck or broken, for example it might be necessary to take the remote apart and rework each component. You can also try reprogramming the vehicle to recognize the new remote.

Buttons

Key fobs can become filthy and worn out due to frequent use. It is not common for buttons to stop working, or to require a hard press to get them working. This can be extremely frustrating especially if you're away from home and need to start your vehicle. Even broken or damaged buttons can be fixed with a little time and the tools you already have at home.

First, check that the batteries are properly placed and that the indentation on the back of the button has been filled. Then, carefully open the remote and examine the circuit board. Look for signs of corrosion or other signs that the buttons are worn or damaged, like missing paint that is conductive. Utilizing a Q-tip that has been dipped in alcohol to gently clean any membrane contacts that have damaged or where conductive paint is missing. Don't rub too hard, as this could erode the conductive paint and prevent the button from firing when pressed.

Check the battery connector's terminals carefully for any loose solder connections. If this is the case, simply connecting them back may bring back function to the button. You can apply the same process to restore functionality to any other loose connection within the fob.

If any of the rubber buttons at the front of the keyfob isn't functioning or require to be pressed extremely hard, the graphite disks at the back of the button could have worn out and require replacement. This can be done by rubbing a pencil across the disks, which should bring the button back to life.

If none of this is helpful or if the button does not respond to a firm press It could be the case that the circuit board itself has gone bad. It is possible to fix this by a quick clean and replacing the solder, but it is recommended to have an additional fob on hand in the event that this method doesn't work for you.

Circuitry

The circuit board of your remote control may be dirty regardless of whether the buttons on the key fob function or not. A very thorough inspection is usually enough to fix this problem. The most frequent causes of dirty circuit boards are water and damaged cases. A damaged case could allow water and other debris into the circuit board, causing it to short out. Water can also get through pins and vias, which are tiny connectors on the board.

If you're skilled enough to open your key fob and don't mind making an mess, you can take the buttons out of their sockets and solder in new ones. It's also worth checking the battery terminal connections. If they're loose, the buttons might not function or get stuck in their down position. Soldering the terminals, and putting the button back in their place is generally all that's needed to return a non-working key fob to functioning condition.

Non-Remote transponder chips

The non-remote chips that are sealed are more durable than their remote fobs, however they are susceptible to breaking when a hole is made into them or when a door handle for a repair car remote control key or lawnmowers is pushed over them. The majority of non-remote transponder chips fail, and this can be attributed to an exploded fuse.

If you're handy enough to remove a sealed non-remote key fob and are able to bear the mess, you can take off the circuit board and test the fuse using a multimeter for proper diode function. If you don't feel comfortable with this, you can go to your local Oreilly or hardware store and use their RF frequency tester. This will inform you whether the key fob transmits a signal.

Programming

Key fobs are subject to many abuses and aren't completely indestructible. They can break their connection with the receiver in your vehicle because of shocks or a low battery, requiring the reprogramming. A professional auto locksmith, or main dealer, can reprogram your keyfob to get it up and running again. If resetting or fixing your keyfob does not work it may be necessary to replace it.