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How to Fix a Key Fob That isn't Working

If your key fob won't work and you're not sure why, you can fix it by following just a few steps. The first step is to make sure it's not the backup remote.

If the backup remote is able to lock and key repair near me and unlock your car door, then there's a likely issue with the primary remote. The most common causes for repair car key fob remote key failure are circuitry or battery issues.

Battery

The battery inside the key fob could get worn out over the course of time. It is quite simple to change out batteries, but it is crucial to ensure that you use the right 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 recommended to inspect the battery compartment thoroughly since dead batteries may leak harmful chemicals that can harm the remote. If changing the battery doesn't fix the problem there could be other issues requiring professional attention. For instance, if the buttons appear stuck or damaged it could be necessary to take the remote apart and rework its components. You can also try reprogramming the vehicle to recognize the new remote.

Buttons

Key fobs may become dirty and worn out from repeated use. This is not uncommon, but it can cause buttons to stop working or require a very long press to work. This can be very frustrating, especially when you are away from home and need to switch on your car. Even malfunctioning or worn-out buttons can be fixed with a bit of time and tools you already have at home.

First, make sure that the batteries have been correctly installed and that the indentation on the back of the button has been filled. Then, carefully open the remote and examine the circuit board. Look for evidence of rust, or other signs the buttons have been damaged or worn. For instance there could be conductive paint missing. Use a Q-tip dipped into alcohol to gently clean any membrane contact that has become damaged or where conductive paint is missing. Don't rub too hard as this can damage the conductive paint and stop the button from firing when pressed.

Examine the battery connector's terminals for loose solder connections. If this is the case, simply connecting them back can restore functionality to the button. The same process can be used to restore function to any other loose connections within the fob.

In the end, if any of the rubber buttons on the front of the key fob stop working or require a long press to function, it is likely that the graphite disks that are on the back of the button are wearing out and need to be replaced. This can be done by rubbing a pencil across the disks, which will bring the button back to working.

If none of this is helpful, or if the button still does not respond to a firm press It could be that the circuit board is damaged. This can sometimes be repaired by a quick clean, and replacing the solder, but it is ideal to have a spare fob on hand in the event that this method fails for you.

Circuitry

Whether or not the key fob buttons are working, the circuit board inside your remote may be dirty. The issue can be solved by a thorough inspection. The most frequent causes of dirty circuit boards are water and damaged cases. A damaged case can allow water and other debris into the circuit board, which can cause it to short out. Water can also eat away at pins and small connectors on the board, which are known as via's.

If you're able to open your key fob and aren't afraid of some mess, we can de-solder the buttons and then solder new ones in their place. It's also worth checking the connections between battery terminals. They can become very filthy and if they're not tight enough, the buttons may not work or even stick in their down position. Soldering the terminals back to their proper positions is usually enough to restore a non-working fob back to working.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are much more durable than remote key repairs fobs they are contained in, but they can 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 chip failures could be attributed to an exploded fuse.

If you're able to remove a sealed non-remote key fob and are willing to put up with the mess, you can take off the circuit board and examine the fuse with a multimeter for proper diode function. If you're not comfortable doing this, visit your local hardware store or Oreilly's, and they will usually have an radio frequency tester that can let you know if the key fob is transmitting a signal.

Programming

Key fobs endure a lot of abuse and aren't indestructible. They can lose their pairing to the car keys repairs near me's receiver due to shock or low battery, requiring them to be reprogrammed. A professional auto locksmith or dealer will be able to reprogram your key fob to get it back up and running. In the event that resetting and repairing your key fob isn't working it could be the time to replace it completely.