There are a wide array of hidden problems that homeowners may discover in their first few weeks occupying a property. This is especially true in older houses, where the new buyer is hardly the first occupant. Many such older homes in Virginia, Maryland and Washington, D.C., are generally solid structures but have minor electrical or plumbing issues that aren't apparent when visiting an open house.

One of the more costly problems that you'll want to watch out for is "hot wiring" throughout the property. This is when, somewhere in your house, the electricity is causing a dangerous amount of heat. Whenever there is too much heat coming from one particular spot in the home, there is the potential for fire, which could end up costing you significantly in the long run - or worse, fatally harm members of the household.

The wall switch is one area where you should be especially worried about poor wiring. These switches are designed so that heat won't build up if correctly installed, so any rise in temperature is a sure sign something is amiss. It is relatively common for a dimming switch to build up heat over an extended period - they are, after all, powering at least 600 watts' worth of light bulbs. However, heat at a receptacle is another matter; a connection there needs immediate improvement to prevent a fire.

When the detector senses an object across its field of view move, it triggers the lights to turn on. The lights would stay on from 1 to 20 minutes, depending on how you preset the timer. After the preset time, the detector automatically shuts the lights off unless there are further movements within its range.