Reasons Your Key Fob Not Unlocking Doors

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Reasons Your Key Fob Not Unlocking Doors

Just like other machinery, key fobs can decide to misbehave when you need it the most. If your key fob is not unlocking your door for reasons unknown to you, we are here to help you find out those possible reasons and provide solutions. Let’s get right to it.


One of the most popular reasons your key fob won’t unlock your door is because of a weak or dead battery. If you have noticed your key fob works intermittently or when you are near to the car, it’s likely to be a battery problem. To confirm, you can use your spare key fob if to unlock the car. If you don’t have a spare key fob, then try changing the battery.


Open your key fob with a flathead screwdriver or any flat metal tool. Upon opening, check your battery number and head to a store. Most stores offer different car key batteries, thus you are likely to find yours. Make the purchase, change your battery and try again.

Bad Button

Your key fob button may be suffering from wear and tear. To confirm whether the problem is from a bad button, try other buttons such as the panic or lock button on your key fob. If it works, then your diagnosis is right.

The best way to resolve this issue is to contact a locksmith. If you prefer the DIY option, here is how you would do it.

First, you need an aluminum foil and a double-sided tape.

Open up your key fob and expose the black contact points of the key fob.

Stick the double-sided tape on the black contact point of the bad button. After this, cut out the aluminum foil to the size of the contact point and attach it to the tape. Press hard for optimum adhesion. Then rearrange your key fob and you are good to go. If it still doesn’t work, it's time to contact an expert from Mark The Locksmith.


Most key fobs and cars have a programming language that keeps them in sync. Once both of them are misaligned, the key fob loses its functionality.


In this case, it is better to reprogram your car’s keyless entry system. Key fob programming is mainly the responsibility of a professional locksmith. At high, we can come to your location to reprogram the key fob.

Though there is a DIY option for reprogramming, but it isn’t reliable.

Disconnected Car Assembly

A key fob will not unlock your door if part of your car assembly is detached from its position. And once that happens, the mechanics of the door would not be complete, thereby keeping the doors locked. It is possible to hear the sound of the door unlocking when you use the key fob but it still won’t open.


Taking it to the car to the professionals is the best option. You will know whether you would need to change the car lock or a weld and glue would fix the problem.

Broken Car Receiver

If all the above steps don’t work, it is likely your car receiver is broken or disconnected. The only way to solve this is to take it to the professionals.

There you have it. All the tips mentioned above are effective, nevertheless, the surest way to have peace of mind about the security of your car is to contact a qualified locksmith for evaluation. Call Mark The Locksmith, to experience the difference in fob reprogramming.