The four words
rusak ‘broken, not working’
bocor ‘leaking’
mampet ‘blocked’
mati ‘dead, off’
AC nya rusak. ‘The air conditioning is broken.’
Atapnya bocor. ‘The roof leaks.’
Wastafelnya mampet. ‘The sink is blocked.’
Listriknya mati. ‘The power is out.’
Note -nya on each one. It marks the specific thing in question, the definiteness use you met in A1, and leaving it off sounds oddly generic.
Asking for repair
Bisa benerin? ‘Can you fix it?’
Kapan bisa datang? ‘When can you come?’
Tolong diperbaiki, ya. ‘Please have it repaired.’
That last one uses the di- passive, and it is the polite form: it asks for the thing to be fixed rather than telling the person to fix it. This is a real politeness strategy in Indonesian and worth copying.
Tukang
Tukang plus a trade names the person.
tukang listrik ‘electrician’
tukang ledeng ‘plumber’
tukang kayu ‘carpenter’
tukang kebun ‘gardener’
It is not a demeaning word. It also appears in tukang bakso, the meatball seller, and tukang parkir, the man who waves you out of a parking space and expects two thousand rupiah.
Water and power
Both go off. It is normal and usually brief.
Mati lampu. ‘Power cut.’ Literally ‘dead light’, and it is the standard phrase whatever is
off.
Air nya nggak ngalir. ‘The water isn’t running.’
What you’ll actually hear
What the book says: Pendingin ruangan tidak berfungsi dengan baik.
What you’ll hear: AC-nya rusak, Pak.