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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. The first step is to be sure that it's not your backup remote.

If the backup is able to lock and unlock your car doors then there is likely an issue with the main remote. The most common causes for key fob repairs malfunctions for car remotes are battery or circuitry issues.

Battery

The battery inside the key fob could be worn out over time. It is simple to replace batteries. However it is crucial that you choose the right kind. You can check your owner's manual or call the manufacturer to find out the correct type. It is also important to check the battery compartment, since batteries that are not working properly can release toxic chemicals that could damage the remote. If changing the batteries does not solve the problem, it may be that there are other issues that require attention from a professional. If the buttons are broken or stuck, for example it might be necessary to take the remote apart and rework each component. It is also possible to reprogramme the vehicle to recognize the new remote.

Buttons

Due to repeated use, key fobs could wear out and become dirty. This is not unusual however, it can cause buttons to cease working or require a long press to work. This can be frustrating, especially when you are away from home and you need to switch on your car. Even broken or damaged buttons are often fixable with a little time and tools you already have at home.

First, make sure that the batteries are properly installed and that the indentation at the back of the button is filled. Open the remote key repair key fob (see this site) carefully and examine the circuit board. Check for indications of rust or other indications that the buttons are worn or damaged. For instance the paint that conducts electricity could be missing. Use a Q-tip dipped into rubbing alcohol to gently clean any membrane contact that has worn out or where conductive painting is missing. Avoid rubbing too hard, because this could damage the conductive paint and stop the button firing when the button is pressed.

Examine the battery connector's terminals for loose solder connections. If this is the case, reconnecting them may restore function to the button. The same method can be used to restore functionality to any other loose connections inside the fob.

Finally, if any of the rubber buttons on the front of the key fob have stopped working or require a long press to function, it is likely that the graphite disks at the back of the button are wearing out and require replacement. This can usually be done by rubbing a pencil over the disks. This should bring the button back to its original state.

If none of these solutions work, or if you still not be able to get the button respond when you press it hard, it is possible that the circuitry is failing. It is possible to fix this by cleaning and re-soldering the fob, but you should have an extra in case it does not work.

Circuitry

Whether or not the key fob buttons are working the circuit board that is inside your remote may be dirty. A very thorough inspection is often enough to resolve this issue. Broken cases and water are the most frequent causes of boards that are dirty. 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 tiny connectors that are found on the board.

If you're handy enough to open your key fob and don't mind a little mess, we can remove the solder from the buttons and put new ones in their place. 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 buttons to their proper positions is usually enough to return a malfunctioning fob back to working.

Non-Remote Transponder Chips

The non-remote chips sealed in a sealed case are more durable than their remote fobs, however they can be cracked when a hole is made in them or in the event that a door handle of a car keys repair near me or lawnmowers plows over them. The failure of the fuse is usually to blame for non-remote chips failures.

If you're able to open a key fob that is sealed and are willing to put up with the mess, you can take off the circuit board and check the fuse using a multimeter for proper diode function. If you don't feel comfortable with this, visit your local Oreilly or hardware store and use their RF frequency tester. This will tell you whether the key fob transmits an RF signal.

Programming

Key fobs take many abuses and aren't completely indestructible. They may lose their connection with the receiver inside your vehicle due to shocks or a low-battery, which requires changing the program. A professional auto locksmith or main dealer can reprogram your key fob and get it functioning again. If resetting or repairing your key fob fails, you may need to replace it.