Every residential lease has an implied warranty of habitability, meaning it is implied that the landlord is leasing a unit that has basic necessities, including heat, hot water, smoke detectors, adequate plumbing, working lights, functioning locks, and so on. You must promprtly notify your landlord of any serious issues with the unit, preferrably through certified mail or some other traceable form of communication. You must also allow a reasonable time period for them to correct the problem. However, if an issue persists or the landlord does not respond, the warranty of habitability may be broken, and your lease may be considered void. This can offer a tenant the ability to walk away from the lease and move on to a more suitable property.