For tenancy, any appliances, fixture, fittings are provided "as is where is basis". No warranty is given.

Nevertheless, if the fault is not attributed to your own negligence. You can contact your landlord for service or repair. The landlord will be obliged to repair the same.

For example: a leaky faucet or the air-conditioning is no longer cold because it has ran out of gas.

For avoidance of doubt, You should pose this type of questions to your prospective landlords to avert any disputes that may arise.

There’s no fix answer or industry practice from my years renting a house, to rending out a house. It’s best you sit down and go through the questions with your landlord. It’s very tricky when dealing with a fully furnished house.