What does my landlord have to fix?
If something provided by the landlord breaks and it isn’t your fault, then it’s up to the landlord to fix it. It’s the landlord’s job to keep the place reasonably well repaired and to make sure it complies with health and safety requirements. E.g. If the house starts leaking, it’s up to the landlord to get this fixed as quickly as possible.
If something needs fixing, you need to tell your landlord immediately. If you don’t, and things get worse, you may have to pay for any further damages. E.g. If you don’t tell the landlord that the house is leaking, the wet carpet might start rotting and have to be replaced. You might have to pay to replace the carpet because if the landlord knew about it immediately, they wouldn’t have to replace the carpet.