Advice on tenants heating in apartment

[Max Hutchinson]

Hello, new to investing here! I am currently house hacking a duplex, I’ve had a tenant of about a year in a half now. He paid two months rent in full, last month and haven’t seen him since. It’s cold where I live and we have a shared utility room. I’ve texted him reminding to have the heat turned on at least a little so the pipes don’t freeze with this coming snow storm we are getting. He insists it’s on but in the utility room the furnace is cold to the touch and I never hear it kick on. How should I approach this with him, asking while still keeping a good relationship with him, and not overstepping my boundaries. He has also said he has been put out of town but that’s all I know cause It’s not my business where he's at. Like I said im new to managing as well. Thanks!