Broken heating unit after acquisition

[Ricardo Nieto]

I recently purchased a duplex and we had a 2 week inspection period. 

Once we came into possession after closing the heating unit wasn't working and come to find out it was broken and spitting carbon monoxide into one of the units. It cost 6,000 to repair. 

Would I be able to get some of this back from the seller? 

The unit was occupied by a tenant while under contract but they vacated before closing. Any tips from more seasoned investors? This is only my second property.

Thanks!