I have a problem with my angelcare monitor.

Seems like the sensor pad isnt working properly. Its been working fine up until now but when I took Megan out of the crib this morning and forgot to shut off the unit, it kept beeping and the alarm never sounded. Its under the mattress the same way it always has been.

The only difference in the room is the fan that we have been using. Do you think the vibration of the fan on the floor is affecting it???

Has anyone had any problems with it and what did you do??