krook wrote:your unit needs to be replaced. what brand of keyless entry/alarm system do you have?
with the door shut properly and the ignition ON, the doors should lock. chances are that the circuit board of the unit is f*cked.
i've seen weird things like this happen on "no-name" brand alarms before, and at that the only advice i can give is to get a whole new system or a replacement unit.
My car doesn't have an aftermarket alarm. The remote for it only has lock/unlock/panic on the back. When you press the lock button, it only locks.. doesn't make any beep noise like I've seen before. The dealer said I do not actually have an alarm system...
but, one day I opened up my door and popped my hood, lock the doors back. I went and opened the hood and the frickin car started honking at me like an alarm would... so I'm not sure.
The doors unlocking when i turn the ignition doesn't bother me at all because the door lock buttons inside work properly and my remote works properly.