A car left running in a Newtown garage set off a sprinkler on Friday.  Newtown Hook and Ladder responded to Hawleyville to assist with a CO alarm and water flow alarm sounding.  Firefighters remained on scene for just over two hours venting the large structure which is broken up into multiple apartments.  No injuries were reported.  Fire company officials say a call like this shows the need for working CO alarms in every house and apartment.