What can block a key fob signal?
What can block a key fob signal? Keeping your key fob safe All you need is a little metal. You can achieve this protection by securely wrapping your key fob in a small piece of aluminum foil. The foil will block the electromagnetic signals of the fob, making it impossible for a relay box to pick them up. What to do if your key fob is not detected? If you want to test this next time it pops up that it isn't detected, take the key about 100 feet away and come back. If it works then, then that is...