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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 with just a few steps. The first step is to make sure that it's not the backup remote.

If your backup remote is unable to unlock and lock the doors of your car, then it is likely that the primary remote isn't functioning. The majority of car remote key malfunctions are caused by circuitry or battery issues.

Battery

It is not uncommon to find a battery on the car key fob to get worn out. It is easy to replace the battery. However it is essential that you choose the right type. You can refer to your owner's guide or contact the manufacturer to find out the correct type. It's also a good idea to inspect the battery compartment thoroughly because dead batteries can leak caustic chemicals that can cause damage to the remote. If changing the batteries does not solve the problem it could be because there are other issues that require attention from a professional. If the buttons are broken or stuck, for example, it may be necessary remove the remote and rebuild each component. It is also possible to reprogramme the vehicle to recognize the new remote.

Buttons

From frequent use, mobile key repair car key remote - Recommended Resource site, fobs may wear out and become dirty. It is not common to have buttons stop working, or to require a hard press to get them working. This can be a huge hassle especially if you're away from home and you need to start your vehicle. Even broken or damaged buttons can be fixed with a bit of time and tools you already have at home.

First, verify that the batteries have been correctly placed and that the indentation at the back of the button is filled. Open the remote carefully and examine the circuit board. Examine for indications of rust or other indications that the buttons are damaged or worn out. For example, conductive paint may be missing. Utilizing a Q-tip dipped in rubbing alcohol, gently clean any membrane contacts that are damaged or have conductive paint missing. Be careful not to rub too hard, since this could cause damage to the conductive paint and block the button firing when it is pressed.

Also, be sure to check the battery connector's terminals to ensure a loose solder connection. If this is the case, reconnecting them can bring back function to the button. The same method can be used to restore function to any other loose connections in the fob.

If any of the rubber buttons at the front of the keyfob isn't functioning or require to be press extremely hard the graphite disks on the back of the button might have worn out and require replacement. This is usually done by rubbing a pencil on the disks, which will 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 pressed hard, it could be that the circuitry is failing. It is possible to fix the issue by cleaning and re-soldering the button, but you should have another spare in case it doesn't work.

Circuitry

If the key fob buttons are working the circuit board that is inside your remote might be dirty. This problem can be resolved by a thorough inspection. Water and broken cases are the most common causes of boards that are dirty. A damaged case can let water and other debris into the circuit board, causing it to short. Water can also get through pins and vias, which are the tiny connectors found on the board.

If you're able to open your key fob and aren't afraid of making some mess, online we can remove the buttons from their sockets and put in new ones. It's also worth looking at the battery terminal connections. They can become extremely dirty and if they're loose, the buttons might not work or even stay in their down position. Soldering the terminals back to their original positions is often enough to bring a non-working fob to working.

Non-Remote Transponder Chips

The non-remote chips that are sealed are more durable than remote fobs, however they are susceptible to breaking in the event of a hole being drilled in them or when a door handle for a car or lawnmowers is pushed over them. Most of the time non-remote transponder chip malfunctions could be attributed to a blown fuse.

If you're not confident opening the key fob, remove the circuitboard and use a multimeter to verify that the diode is working correctly. If you're not comfortable with this, you can go to your local Oreilly or hardware store and test their RF frequency tester. This will inform you whether the key fob sends signals.

Programming

Key fobs are not indestructible and are susceptible to being damaged by a variety of factors. They may lose their connection with the receiver in your vehicle key repairs because of shocks or a low-battery, which requires changing the program. A professional auto locksmith or main dealer can reprogram your key fob to get it functioning again. If, in the unlikely event that resetting and fixing your key fob doesn't work, it could be time to replace it completely.