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How to Fix a Key Fob That isn't Working

If your key fob doesn't work then you can fix it with just a few steps. First, check to make sure it's not the backup remote.

If the backup remote is able to lock and unlock your car door, it is most likely an issue with the primary remote. Most problems with car remote keys result from battery or circuitry problems.

Battery

It is not uncommon for the battery inside a key fob for cars to get worn out. It is quite simple to change out a battery, although it is important to ensure you select the correct one and you can consult your owner's manual or contact the manufacturer's dealer to determine the type of battery you need. It's recommended to inspect the battery compartment thoroughly since dead batteries may release caustic chemicals that could damage the remote. If changing the battery doesn't fix the problem there may be additional issues that require professional attention. If buttons are damaged or stuck for instance, 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

From repeated use, key fobs could become worn and dirty. This is not uncommon however it can cause buttons to cease functioning or require a hard press for them to function. This can be very frustrating particularly if you're out of town and need to start your vehicle. Even malfunctioning or worn-out buttons can be fixed with a little time and tools you already have at home.

First, make sure the batteries are up correctly and that the indentation on the back of the button is filled. Take the remote apart and look over the circuit board. Check for signs of corrosion or other indications that the buttons are worn out or damaged, like missing conductive paint. Utilizing a Q-tip that has been dipped in alcohol, gently clean any membrane contacts that have become damaged or have conductive paint missing. Don't rub too hard as this can damage the conductive paint and stop the button from firing when pressed.

Also, carefully check the battery connector's terminals to ensure an unattached solder connection. Soldering them back in place will allow the button to function again in the event that this is the case. You can use the same method to restore functionality to any other loose connection inside 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 might have worn out and require replacement. It is usually done by rubbing a pencil over the disks. This should bring the button to life.

If all of this doesn't help or if the button still does not respond to a firm press It could be the case that the circuit board itself has become damaged. It is possible to fix this by cleaning and re-soldering the button however, you should have another spare in case it does not work.

Circuitry

Whether or not the keys fob buttons are functioning the circuit board in your remote may be dirty. This issue can be fixed through a thorough examination. Broken cases and water are the most frequent causes of boards that are dirty. A broken case can let water and other debris to enter the circuit board, which can cause it to short out. Water can also damage pins and vias, which are small connectors that are found on the board.

If you're handy enough to remove your key fob and don't mind some mess, we can take off the buttons and remote key repair put new ones in their place. It's also worth looking at the battery terminal connections. They can get very filthy and if they're not tight enough, the buttons might not work or even stick in their down position. Soldering the terminals and buttons back in their place is generally all that's needed to return a non-working key fob to working condition.

Non-Remote transponder chips

The sealed non-remote chips are more durable than their remote Key repair fobs, but they are susceptible to cracking in the event of a hole being drilled in them or when a door handle for a car key repair company or lawnmowers plows over them. Failures of the fuse are typically to blame for non-remote chip failures.

If you're able to remove a key fob that is sealed and are able to bear the mess, you can easily remove the circuit board and examine the fuse using an instrument to verify diode function. If you're not confident doing this, go to your local hardware store or Oreilly's and they will usually have an RF frequency tester that will let you know whether the key fob is transmitting a signal.

Programming

Key fobs aren't indestructible and are susceptible to being damaged by a lot of things. They can lose their pairing to the receiver in your car because of shock or a low battery, which requires the reprogramming. A professional auto locksmith or dealer will be able to reprogram your key fob and get it working again. In the event that resetting and repairing your key fob doesn't work it could be the time to replace it completely.