Artificier revisited :how ti heal a mechanical servant

[Satsujinki]

Question: how do you heal a construct since cure wounds, healing Word and similar have no effect in construct and undead?
The thing is actually called a construct, we're not talking of a warforged, but of an actual construct....

[A Fat Dragon]

Mending Cantrip? Blacksmith/Tinkerer’s Tools?

Really depends on your DM I guess. I’d say Mending, but it only heals either 1 or 1d4 HP per casting. So, it’s easy to heal up your construct, but terribly hard in combat.

[Aett_Thorn]

I think that by RAW, the main way to heal it is to take short/long rests. On a short rest, it should be able to roll hit dice, and on a long rest, it should heal up. How it is doing this, I have no idea, but most healing spells won't work on it.