The Supreme Court of Pennsylvania has held that a lessor is liable in trespass for non-performance of a promise to repair which he orally made at the time of execution of the lease.
Reitmeyer v. Sprecher, 431 Pa. 284, 243 A.2d 395 (1968).
James S. Dillman,
Torts - Landlord-Tenant,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol7/iss1/21