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How to Fix a Key Fob That isn't Working

If your key fob isn't functioning There are a few simple steps that can be taken to fix it. The first step is to make sure that it's not your backup remote.

If your backup remote can unlock and lock the doors of your vehicle, it is most likely that the primary remote is not working. Most problems with repair car key fob remote keys result from circuitry or battery problems.

Battery

It is not unusual to find a battery on the key fob for cars to get worn out. It is simple to replace a battery. However, it is important to select the right kind. You can refer to the owner's manual or contact the manufacturer to inquire about the right type. It is also important to examine the battery compartment, as dead batteries can leak caustic chemicals that can harm the remote. If changing the battery doesn't fix the problem there may be additional issues that require professional attention. For example, if buttons seem stuck or broken, it may be necessary to take the remote apart and rebuild its components. You can also try reprogramming the vehicle to recognize the new key fob.

Buttons

Key fobs may become dirty and worn-out from frequent use. It is not common for buttons to cease functioning, or require a hard press to get them working. This can be a hassle, especially when you are away from home and have to turn on your car key fob repair service. Even worn-out or malfunctioning buttons can be fixed with a little time and tools you already have at home.

First, remote key repair check that the batteries are charged correctly and that the indentation on the back of the button is filled. Then, carefully open up the remote and examine the circuit board. Check for signs of corrosion or other indications that the buttons are worn out or damaged, such as missing conductive paint. Use a Q-tip dipped into alcohol to gently clean any membrane contact that has become damaged or where conductive paint is missing. Do not rub too vigorously, as this could erode the conductive paint and stop the button from firing when it is pressed.

Also, be sure to check the battery connector terminals for a loose solder connection. If this is the case, soldering them back in place can bring back function to the button. You can use the same procedure to restore functionality to any other loose connection in the fob.

If any of the rubber buttons on the front of the keyfob isn't functioning or require to be pressing very hard, the graphite disks at the back of the button may have worn out and need to replaced. This can be done by rubbing a pencil across the disks. This should bring the button back to its original state.

If none of this is helpful, or if the button still does not respond to a hard push, then it may be that the circuit board has gone bad. It is possible to fix this by cleaning and re-soldering your fob but you should also have an extra in case it doesn't work.

Circuitry

Whether or not the key fob buttons are working, the circuit board inside your remote may be dirty. This issue can be fixed through a thorough examination. The most frequent causes of dirty circuit boards are water and broken cases. A broken case allows water and other debris to get in and short out the electronic components. Water can also destroy pins and small connectors on the board called via's.

If you're able to open up your key fob, and you're not afraid of a little mess, we can take off the buttons and put new ones in their place. It's also worth looking at the battery terminal connections. If they're loose, the buttons could not function or get stuck in their down position. Soldering the terminals and buttons back into place is typically all it takes to restore keys that are not in functioning condition.

Non-Remote transponder chips

Sealed non-remote transponder chip are more durable than the remote fobs that have them but they can still be damaged by a hole that is drilled into them or run over by a lawnmowers blade or car door handle. Most of the time non-Remote Key repair transponder chip failures can be blamed on blowing fuses.

If you're able to open the sealed key fob and can tolerate the mess, you can take off the circuit board and test the fuse using an instrument to verify diode function. If you're not confident doing this, head to your local hardware store or Oreilly's, and they'll usually have an radio frequency tester that can let you know whether the key fob is sending a signal.

Programming

Key fobs aren't indestructible and are susceptible to being damaged through a variety of causes. They can break their connection with the receiver inside your vehicle due to shocks or low battery, requiring changing the program. A professional auto locksmith, or the main dealer can reprogram the keyfob and get it up and running again. If, in the unlikely event that resetting and fixing your key fob doesn't work it could be the time to replace it completely.