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How to Fix a Key Fob That isn't Working

If your key fob does not work then you can fix it with some simple steps. First, make sure that it's not your backup remote.

If your backup remote can lock and unlock the doors of your car, it is likely that the main remote isn't functioning. Most problems with car remote keys are caused by circuitry or battery issues.

Battery

It is not unusual to find a battery on a car key fob to get worn out. It is fairly easy to change out batteries, but it is important to make sure that you choose the correct type and you can consult your owner's manual, or contact the dealer for the manufacturer to determine the type of battery you require. It's also a good idea to examine the battery compartment with care, as dead batteries sometimes leak harmful chemicals that can harm the remote. If changing the batteries doesn't solve the problem, it may be that there are other issues that require attention by a professional. If buttons are broken or stuck, for example, it may be necessary take the remote apart and rework each component. You could also try reprogramming your vehicle to recognize the new key fob.

Buttons

Key fobs can get dirty and worn out from frequent use. It is not unusual to have buttons stop working, or Remote Key Repair to require a hefty push to make them work. This can be a hassle, Remote Key Repair especially when you are away from your home and you need to switch on your car. Even malfunctioning or worn-out buttons can be fixed with a bit of time and materials you already have at home.

First, check that the batteries are correctly installed and that the indentation on the back of the button has been filled. Open the remote carefully and inspect the circuit board. Examine for signs of rust or other signs that the buttons are worn or damaged, like missing conductive paint. Use a Q-tip dipped into rubbing alcohol to gently clean any membrane contact that has damaged or where conductive painting is missing. Do not rub too vigorously as this can damage the conductive paint, and block the button from firing when pressed.

Also, carefully check the battery connector's terminals for a loose solder connection. If this is the case, simply connecting them back may restore functionality to the button. The same procedure can be used to restore function to any loose connections within the fob.

If any of the rubber buttons located at the front of the keyfob are not functioning or require to be pressed very hard the graphite disks at the back of the button could have worn out and will need to replaced. This is usually done by rubbing a pencil on the disks. This should bring the button back to life.

If none of these solutions work, or if you still cannot get the button to respond when pressed hard, it is possible that the circuitry is failing. It is possible to fix this by a quick clean and re-soldering, but it is ideal to have a spare fob available in the event this method fails for you.

Circuitry

The circuit board of your remote control may be dirty, regardless of whether the buttons on the key fob are working or not. 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 connectors on the board, which are known as via's.

If you are handy enough to open your key fob, and you don't mind making an mess, you can remove the buttons from their sockets and put in new ones. It's also worth checking the battery terminal connections. They can get very dirty and if they're loose the buttons may not work or even stick in their down position. Soldering the terminals and button's back in place is usually all that's required to return a non-working key fob to working condition.

Non-Remote Key repair transponder chips

Sealed non-remote transponder chips are more durable than remote fobs they are contained in, but they can still be damaged by a hole that is drilled into them or run over by a lawnmower or car door handle. Most of the time, non-remote transponder chips fail, and this can be blamed on a blown fuse.

If you're not comfortable opening the key fob, you may take the circuit board off and use a multimeter to verify that the diode is functioning correctly. If you're not confident doing this, visit your local hardware store or Oreilly's, and they will usually have a radio frequency tester that can tell you if the key fob is sending a signal.

Programming

key repair shops near me fobs are subject to a lot of abuse and aren't indestructible. They may lose their connection with the receiver inside your vehicle due to shocks or low battery, requiring the reprogramming. A professional auto locksmith, or main dealer can reprogram your keyfob to get it up and running again. If, in the unlikely event that resetting and repairing your key fob doesn't work it may be time to replace it completely.