Today, I opened the drivers door using the key (rather than the key fob) and the alarm started blaring. I could not get the alarm to turn off by putting the key in the ignition either, as it just flashed theft. I had used the key because the battery on the fob was dying, and with the cold temps, it didn't work. I warmed the fob in my hands for a minuite (alarm still on...) and finally got the unlock button on the fob to turn off the alarm. Is that normal or is there something missing/broken? If I unlock it using the fob, it is perfectly fine. I don't believe it should do that, but I am not sure what switch/wire is broken. Is there one in the door to sense a key is being used?