my contracts didn't indicate, but normally landlord shd be in charge.
e.g. the door bell and the washing machine of my bro's rented flat were out of order, the landlord had someone to fix the doorbell and asked him to take his clothes to dry clean shop to clean and pay him back the bills.
for me my washing machine and hot water gas out of order, my landlord paid.
both contracts didn't indicate who will be in charge.
if your landlord is unwilling to pay, i wld deduct the fix charge from your rent and pay him less the next mth.