Final answer:
The landlord is primarily responsible for making repairs under the Arizona Landlord Tenant Act. They must keep the property habitable and perform necessary repairs, though property managers may act on the landlord's behalf.
Step-by-step explanation:
Under the Arizona Landlord Tenant Act, the primary responsibility for making repairs falls on the landlord. Landlords are required to maintain the property in a fit and habitable condition and make all repairs necessary to fulfill this requirement. The specifics of this obligation can be found in the rental agreement as well.
Tenants have the responsibility to notify the landlord if repairs are needed and may have some responsibilities themselves for minor upkeep or as negotiated in the lease. However, significant repairs related to the property's habitability are typically the landlord's responsibility. It should be noted that property managers or property management companies, if employed by the landlord, may act on behalf of the landlord to fulfill these duties, but the ultimate legal responsibility lies with the landlord.