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How to Fix a Key Fob That isn't Working

If your key fob doesn't work A few easy steps can fix it. First, ensure that it's not your backup remote.

If your backup remote cannot unlock and lock the doors of your vehicle, it is likely that the main remote isn't functioning. The majority of car remote key malfunctions are caused by battery or circuitry problems.

Battery

It is not uncommon for the battery inside a key fob for cars to wear out. It is relatively easy to change out a battery, although it is important to make sure that you use the right type and you can consult your owner's manual, or contact the dealer of the manufacturer to find out what kind of battery you need. It is recommended to inspect the battery compartment carefully, as dead batteries sometimes leak caustic chemicals that can cause damage to the remote. If replacing the battery does not fix the issue there could be other issues that require professional attention. For instance, if buttons seem to be stuck or broken, it may be necessary to disassemble the remote and rework its components. You can also try reprogramming your vehicle to recognize the new key fob.

Buttons

Through frequent use, key fobs could become worn and dirty. This is not unusual however, it can cause buttons to cease working or require a difficult press to get them to work. This can be very frustrating especially when you're away from your home and have to switch on your car. Fortunately, even worn-out or malfunctioning buttons can often be fixed with just a bit of time and a few materials you have in the home.

First, make sure the batteries are properly charged and that the indentation on the back of the button is filled. Then, carefully remove the remote and inspect the circuit board. Check for signs of corrosion or other indications that the buttons are worn or damaged, such as missing the conductive paint. Use a Q-tip that has been dipped in rubbing alcohol to gently clean any membrane contact that has worn-out or where conductive painting is missing. Avoid rubbing too hard, as this can erode the conductive paint and block the button firing when the button is pressed.

Also, make sure to inspect the battery connector terminals for an unattached solder connection. If this is the case, simply soldering them back in place can restore functionality to the button. The same process can be used to restore function to any loose connections within the fob.

If, for instance, any of the rubber buttons on the front of the key fob have stopped functioning or require a long press to function it is likely the graphite disks that are on the back of the button are deteriorating and need to be replaced. It is usually done by rubbing a pen across the disks. This will bring the button back to life.

If none of this is helpful, or if the button still doesn't respond to a hard press It could be that the circuit board has become damaged. It is possible to fix the issue by cleaning and re-soldering your fob but you should also have an extra in case it does not work.

Circuitry

Whether or not the key car repair fob buttons are working the circuit board in the remote could be dirty. A very thorough inspection is usually enough to fix this problem. The most common causes of dirty circuit boards are water and damaged cases. A broken case allows water and other debris to pass through and short circuit the electronic components. Water can also damage pins and vias, which are tiny connectors on the board.

If you're skilled enough to open your key fob and aren't afraid of making an mess, you can take the buttons out of their sockets and put in new ones. It's also worth examining the battery terminal connections. If they are loose, the buttons might not function or get stuck in their down position. Soldering the terminals and button's back in place is usually all that's needed to return the key fob that is not working to working condition.

Non-Remote Transponder Chips

The non-remote chips that are sealed are more durable than remote fobs, but they are susceptible to cracking when a hole is made into them or when a door handle for a car or lawnmower runs over them. Failures of the fuse are typically to blame for non-remote key fob repair chip failures.

If you are not comfortable opening the key fob, you can remove the circuitboard and utilize a multimeter to verify that the diode is working correctly. If you're not confident doing this, car key fob repairs go to your local hardware store or Keyless Entry Repair the Oreilly's and they will usually have a RFID frequency tester that can determine whether the key fob transmitting a signal.

Programming

Key fobs take many abuses and aren't completely indestructible. They can lose their pairing to the mobile car key repair near me's receiver because of shock or a low battery, which calls for them to be reprogrammed. A professional auto locksmith, or main dealer, can reprogram your keyfob and get it functioning again. If resetting or fixing your key fob fails it is possible to replace it.