Why would my 50 gal. State Select water heater come on so often. It comes on every 11 minutes and runs for 5 minutes. The temperature in the garage where the water heater is located is 71 degrees in the evening (Florida) and higher during the day. This is a brand new water heater - just installed. The gas meter is using 9 sq. Ft per hour. This was installed by a very reputable Plumbing company - they did not have any answers. Help!