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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, ensure that it's not your backup remote.

If your backup remote cannot lock and unlock the doors of your car, then it is likely that the primary remote isn't functioning. The majority of car remote key malfunctions result from battery or circuitry problems.

Battery

The battery in the key fob may wear out over time. It is quite simple to change out a battery, although it is crucial to ensure that you use the right type; you can look in the owner's manual or talk to the dealer for the manufacturer to determine the type of battery you need. It is also crucial to check the battery compartment as batteries that are not working properly can release caustic chemicals which can damage the remote. If changing the battery doesn't fix the problem, there may be other issues that require attention from a professional. For example, if buttons seem to be stuck or broken, it may be necessary to take the remote apart and rework its components. You can also try reprogramming your car to recognize the new key fob.

Buttons

From frequent use, key fobs could get dirty and worn. This is not unusual however it can cause buttons to stop functioning or require a hard press for them to function. This can be very frustrating especially if you're away from home and need to start your vehicle. Fortunately, even worn-out or broken buttons can usually be fixed with a bit of time and a few materials you have in the house.

First, make sure the batteries are charged correctly and that the indentation on the back of the button is filled. Take the remote apart and look over the circuit board. Examine for evidence of rust, or other signs the buttons have been damaged or worn out. For example, conductive paint may be missing. Use a Q-tip dipped in alcohol, gently clean any membrane contacts that are worn or where conductive paint is missing. Be careful not to rub too hard, because this could damage the conductive paint and block the button firing when pressed.

Check the battery connector terminals for loose solder connections. Soldering them back into place can restore the button's functionality If this is the case. You can apply the same method to restore functionality to any other loose connection within the fob.

If any of the rubber buttons located at the front of the keyfob aren't functioning or require to be press extremely hard the graphite disks at the back of the button could have worn out and require replacement. You can usually do this by rubbing a pencil over the disks. remote car key repair should bring the button back to life.

If none of this is helpful, or if the button still does not respond to a hard press, then it may be the case that the circuit board itself has become damaged. This can sometimes be repaired with a quick clean and replacing the solder, but it is recommended to have an additional fob available in the event this method does not work for you.

Circuitry

The circuit board in the remote control could be dirty, regardless of whether the buttons on the key fob are working or not. This problem can be resolved by a thorough inspection. 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 out the electronics. Water can also damage pins and vias, which are the tiny connectors on the board.

If you're skilled enough to open your key fob and you don't mind making some mess, we can take the buttons out of their sockets and solder in new ones. It's also worth checking the battery terminal connections. They can become extremely filthy and if they're not tight enough, the buttons may not work or even stick in their down position. Soldering terminals and buttons back into place is usually enough to return a malfunctioning fob to working.

Non-Remote Transponder Chips

The non-remote chips that are sealed are more durable than their remote fobs. However, they are susceptible to cracking when a hole is made in them or in the event that a door handle of a car or lawnmower runs over them. The majority of non-remote transponder chips fail, and this can be blamed on an exploded fuse.

If you are not comfortable opening the key fob, you can remove the circuitboard and use a multimeter to check that the diode is working correctly. If you're not comfortable doing this, head to your local hardware store or Oreilly's, and they usually have an radio frequency tester that can let you know whether the key fob is transmitting a signal.

Programming





Key fobs aren't indestructible and can be damaged by a variety of factors. They can lose their pairing with the receiver inside your vehicle due to shocks or a low battery, which calls for the reprogramming. A professional auto locksmith or dealer will be able to reprogram your key fob and get it functioning again. If resetting or repairing the keyfob is not working it may be necessary to replace it.