<human>: Hello reddit,

So I am renting a house in the Boston area for the year and thus far my landlord has been unreasonable to say the least. After returning from winter break, I come home to a carbon monoxide detector going off. At first, thinking nothing of it, I try to reset it then replace the batteries. After doing so, the alarm is still going off forcing me to leave the house and head to a friend's apartment (a real GGG) to avoid sucking poison into my lungs. 
I decided my best course of action would be to call my landlord and explain calmly that my CO detector is going off, however, he responded by screaming at me for unrelated issues with the house (which have since been resolved). After a 10 minute phone conversation of him yelling at me and me calmly explaining to him that the house is currently uninhabitable, he hung up the phone with my relatively pressing issue still at hand. What legal obligations does my landlord have in regard to inspecting this carbon monoxide-filled house? Who do I call to get this fixed so I can sleep in my house tonight?

Can you condense the text into three sentences or less?
<bot>: My carbon monoxide detector is going off and my landlord won't send someone to fix it. What legal obligations does he have to do something?