How to Fix a Key Fob That isn't Working If your key fob won't work then you can fix it with some simple steps. First, check to make sure it's not your backup remote. If your backup remote is unable to unlock and lock the doors of your car, then it is most likely that the primary remote isn't working. The most common causes of key problems with your car remote are issues with the circuitry or battery. Battery It is not uncommon for the battery in a car key fob to wear out. It is fairly easy to change out a battery, although it is essential 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 require. It's also a good idea to inspect the battery compartment with care, as dead batteries sometimes leak caustic chemicals that can damage the remote. If changing the batteries doesn't solve the problem it could be because there are other issues that require attention from a professional. For instance, if buttons seem stuck or broken, it may be necessary to take the remote apart and rebuild its components. You could also try reprogramming your car to recognize the new key fob. Buttons From frequent use, key fobs may become worn and dirty. This is not atypical, but it can cause buttons to cease functioning or require a hard press for them to function. This can be a hassle particularly when you're away from your home and need to turn on your car. Fortunately, even worn-out or damaged buttons can be fixed with a bit of time and a few items you might already have in the house. First, make repair car key that the batteries are properly placed and that the indentation on the back of the button has been filled. Then, carefully open up the remote and inspect the circuit board. Look for signs of corrosion or other signs that buttons are worn out or damaged, such as missing conductive paint. Then, using a Q-tip dipped in alcohol, gently clean any membrane contacts that have become worn or have conductive paint missing. Avoid rubbing too hard because this could damage the conductive paint and block the button from firing when the button is pressed. Also, be sure to check the battery connector's terminals for an unattached solder connection. If this is the case, simply reconnecting them may bring back function to the button. The same process can be used to restore function to any other loose connections in the fob. If any of the rubber buttons on the front of the keyfob are not functioning or require to be pressing very hard the graphite disks on the back of the button may have worn out and will require replacement. This can be done by rubbing a pencil across the disks, which will bring the button back to working. If all of this doesn't help or if the button does not respond to a hard press It could be the case that the circuit board itself has gone bad. This can sometimes be repaired by a quick clean, and refitting, but it's ideal to have a spare fob in case this method fails for you. Circuitry Whether or not the key fob buttons function the circuit board that is inside the remote could be dirty. The issue can be solved through a thorough examination. The most common causes for dirty circuit boards is water and damaged cases. A damaged case allows water and other debris to get in and short circuit the electronics. Water can also eat away at pins and connectors on the board called via's. If you're able to remove your key fob, and you're not afraid of a little mess, we can take off the buttons and then solder new ones in their place. It's also worth examining the battery terminal connections. If they're loose, the buttons might not function or get stuck in their down position. Soldering the terminals back to their original positions is often enough to return a malfunctioning fob back to working. Non-Remote Transponder Chips Sealed non-remote transponder chips are more durable than the remote fobs they are contained in, but they can still be damaged by a hole that is made in them or pushed over by a lawnmowers or car door handle. The majority of non-remote transponder chip failures can be blamed on blowing fuses. If you're not comfortable opening the key fob, remove the circuitboard and utilize a multimeter to check that the diode is operating correctly. If you're not comfortable doing this, visit your local hardware store or Oreilly's and they usually have a radio frequency tester that can tell you if the key fob is sending a signal. Programming Key fobs aren't indestructible and are susceptible to damage through a variety of causes. They can lose their pairing with the receiver inside your vehicle because of shocks or a low battery, which calls for changing the program. A professional auto locksmith or the main dealer, can reprogram your key fob and get it back up and running again. If resetting or replacing your key fob fails it is possible to replace it.
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