The water heater in the house I rented is broken. Should I repair it or the landlord?

the electrical appliances in the rental house are part of the rental items. If there is an agreement in the contract that the lessee shall carry out the maintenance according to the contract, there is no agreement that the lessor shall carry out the maintenance.

Article 22 of the Contract Law stipulates that "the lessor shall perform the maintenance obligations of the lease item, unless otherwise agreed by the parties." Article 221 stipulates that "when the lease item needs maintenance, the lessee may require the lessor to maintain it within a reasonable period of time. If the lessor fails to perform the maintenance obligation, the lessee may carry out the maintenance by himself, and the maintenance expenses shall be borne by the lessor. If the maintenance of the leased property affects the lessee's use, the rent shall be reduced or the lease term shall be extended accordingly. "