Texas Property Code - PROP § 92.259. Landlord's Failure to Install, Inspect, or Repair

(1) the landlord did not install a smoke alarm at the time of initial occupancy by the tenant as required by this subchapter or a municipal ordinance permitted by this subchapter;  or

(2) the landlord does not install, inspect, or repair the smoke alarm on or before the seventh day after the date the tenant gives the landlord written notice that the tenant may exercise his remedies under this subchapter if the landlord does not comply with the request within seven days.