Depending how important the A/C is [a rental unit in the desert needs it more than one on the coastline], failure to supply it could go to the central basis of the contract [heart of the matter] and be sufficient to be considered a significant breach of the contract. The party breaching, the landlord, can not use his failure to supply the A/C to get out of the contract.
Answered on Jul 14th, 2013 at 9:14 PM