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How to Fix a Key Fob That isn't Working

If your key fob doesn't work, you can fix it by following a few simple steps. The first step is to be sure that it's not your backup remote.

If the backup can lock and unlock your car key immobiliser repair door, then there's a likely issue with the main remote. The most common causes of key problems with your car remote are battery or circuitry issues.

Battery

It is not unusual for the battery in a key fob for cars to degrade. It is quite simple to change out batteries, but it is crucial to make sure that you select the correct one and you can consult the owner's manual or talk to the manufacturer's dealer to find out the kind of battery you need. It's also a good idea to examine the battery compartment thoroughly, as dead batteries sometimes leak caustic chemicals that can cause damage to the remote. If changing the battery doesn't fix the issue, there may be other issues that require attention from a professional. For example, if buttons seem to be stuck or broken it could be necessary to disassemble the remote and rework its components. You can 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 uncommon for buttons to stop working, or to require a long press to get them working. This can be extremely frustrating especially if you're away from home and you need to start your car. Fortunately, even worn-out or broken buttons can usually be fixed with a bit of time and a few items you may already have around the home.

First, verify that the batteries are correctly placed and that the indentation at the back of the button has been filled. Then, carefully remove the remote and examine the circuit board. Look for signs of rust or other signs the buttons are damaged or worn out. For instance, conductive paint may be missing. Use a Q-tip that has been dipped in rubbing alcohol to gently clean any membrane contact that has damaged or has conductive paint missing. Do not rub too vigorously, as this could erode the conductive paint, and block the button from firing when you press it.

Check the battery connector terminals carefully for any loose solder connections. Soldering them back into place will restore the button's functionality If this is the situation. You can apply the same method to restore functionality to any other loose connection in the fob.

If, for instance, any of the buttons made of rubber that are on the front of the key fob stop functioning or require a difficult press to function it is likely the graphite disks that are on the back of the button are deteriorating and need to be replaced. You can do this by rubbing a pencil over the disks. This will bring the button back to life.

If none of these solutions work, or if you still not be able to get the button respond when you press it hard, it is possible that the circuitry has failed. This can sometimes be repaired by a quick clean and re-soldering, but it is ideal to have a spare fob in case this method fails for you.

Circuitry

Whether or not the keys fob buttons are functioning the circuit board in your remote may be dirty. A thorough examination will usually resolve this problem. Broken and damaged cases are the most frequent causes of boards that are dirty. A damaged case allows water and other debris to pass through and short out the electronic components. Water can also eat through pins and vias, which are the tiny connectors that are found on the board.

If you're able to open up your key fob, and you're not afraid of making a mess, we can take off the buttons and solder new ones in their place. It's also worth checking the battery terminal connections. If they're loose, the buttons might not function or get stuck in their down position. Soldering the terminals and buttons back in place is usually all that's needed to return a non-working key fob to working order.

Non-Remote transponder chips

The non-remote chips sealed in a sealed case are more durable than their remote fobs. However, they are susceptible to cracking when a hole is made in them, or when a door handle for a car or lawnmower runs over them. The failure of the fuse is usually the cause of non-remote chip failures.

If you're able to open the sealed key fob and are able to bear the mess, you can easily remove the circuit board and check the fuse using a multimeter for proper diode function. If you don't feel comfortable with this, you can visit your local Oreilly or hardware store and utilize their RF frequency tester. This will tell you whether the key fob transmits an RF signal.

Programming

Key fobs endure many abuses and aren't indestructible. They can lose their pairing to the car key repairs near me's receiver because of shock or a low battery, which calls for the reprogramming. A professional auto locksmith or main dealer can reprogram your key fob to get it functioning again. In the event that resetting or repairing your key repair car key remote (go to Optionshare) fob fails it may be time to replace it all over again.