While were on the subject of keeping appliances safe.....Make sure your relief valve on your water heater is in working order (Just hold a bucket under it and give it a quick snap once in a while and a small blast of hot water will come out and then it will reseal.) Water heaters can explode like a bomb and I have seen them go right through a wall or roof. I've seen tests where they will blow about 40 feet in the air!
