TS, it will be by the tenant. The fan , lighting , AC, appliances are considered final fix & falls under consumable & need to be maintained.

Usually tenant have grace period of 1 month to lodge all the defects to the LL, to be fixed by LL. After the period, any faulty fittings will be by tenant.

If the wiring faulty or piping leaks , that is under LL because that is infrastructure, not the final fix.

Some LL evaluate the scenario case by case also. If the fan was too old (> 10 years) & after so many tenants, it may not be fair to ask the tenant to repair. Unless upfront the LL already informed because of the old fittings , the tenant are getting the cheaper rental rates, if got such , then nothing you can do.

Else, negotiate for new replacement at the LL cost , if can’t get , at least negotiate 50:50 cost sharing (this option can easily be agreed most of the time) .