It's Illegal To Run Your Car's A/C In Massachusetts This Summer
According to mass.gov, while this law does prohibit unnecessary idling, it also recognizes that there are times when idling is simply unavoidable and lists three specific exemptions: Like when an engine is being repaired and operating the engine is necessary for the repair; or when a vehicle is making deliveries and associated power is necessary; and when the engine is used to provide power to another device.