How to Fix a Key Fob That isn't Working

If your key fob does not work, you can fix it with a few simple steps. The first step is to be sure that it's not your backup remote.

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

Battery

The battery inside a key fob can wear out over time. It is quite simple to change out a battery, although it is essential to ensure that you choose the correct type; you can look in your owner's manual or contact the dealer of the manufacturer to find out the kind of battery you require. It is also crucial to inspect the battery compartment as batteries that are not working properly can release caustic chemicals which can damage the remote. If replacing the batteries doesn't solve the problem it could be because there are other issues that require attention by a professional. For instance, if the buttons seem to be stuck or broken It may be necessary to disassemble the remote and rebuild its components. You can also try reprogramming your car to recognize the new key fob.

Buttons

Due to frequent use, key fobs may become worn and dirty. It is not uncommon for buttons to cease working, or to require a hefty push to make them work. This can be frustrating, especially when you are away from home and you need to switch on your car. Fortunately, even worn-out or malfunctioning buttons can often be fixed with just a bit of time and a few items you have in the house.

First, make sure that the batteries are properly placed and that the indentation on the back of the button has been filled. Then, carefully remove the remote and inspect the circuit board. Look for indications of rust or other indications that the buttons have been damaged or worn out. For instance the paint that conducts electricity could be missing. Then, using a Q-tip that has been dipped in alcohol to gently clean any membrane contacts that are damaged or where conductive paint is missing. Avoid rubbing too hard because this could damage the conductive painting and prevent the button firing when it is pressed.

Also, make sure to inspect the battery connector terminals for an unattached solder connection. Soldering them back to their original position will restore the button's functionality if this is the case. The same procedure can be used to restore functionality to any other loose connections within the fob.

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

If none of this is useful or if the button does not respond to a firm press, then it may be the case that the circuit board itself is damaged. It is possible to fix this by a quick clean, and refitting, but it's best to have an extra fob in case this method doesn't work for you.

Circuitry

If the keys fob buttons are functioning, the circuit board inside your remote may be dirty. This problem can be resolved by a thorough inspection. The most common causes of dirty circuit boards are water and damaged cases. A damaged case could allow water and other debris to get into the circuit board, which can cause it to short out. Water can also damage pins and vias, which are the tiny connectors found on the board.

If you're able to open your key fob Key repair and aren't afraid of making an mess, you can remove the buttons from their sockets and solder in new ones. It's also worth examining the battery terminal connections. If they're loose, the buttons could not function properly or become stuck in their down position. Soldering the terminals and button's back into place is typically all it takes to restore a non-working key fob to functioning condition.

Non-Remote transponder chips

Sealed non-remote transponder chip are more durable than the remote fobs that have them but they can be cracked by a hole made in them or pushed over by a lawnmowers or door handle for a car. The failure of the fuse is usually the cause of non-remote chip failures.

If you're not comfortable opening the key fob, you may remove the circuitboard and use a multimeter to check that the diode is working properly. If you're not sure with this, you can visit your local Oreilly or fob key repair hardware store and test their RF frequency tester. This will tell you whether the key fob transmits signals.

Programming

Key fobs are not indestructible and can be damaged by a variety of factors. They may lose their connection to the car key immobiliser repair's receiver due to shock or low battery, which calls for the reprogramming. A professional auto locksmith or a main dealer can reprogram your key fob to get it functioning again. If resetting or repairing your key fob fails, you may need to replace it.