Guide

Common causes of no hot water in a Paris apartment

Before assuming the worst, a couple of things take thirty seconds to check. If they don't fix it, here's what a plumber will actually be looking for.

Two quick things worth checking first

Is it just your flat, or the whole building? If neighbours have hot water and you don't, the problem is local to your apartment. If nobody in the building has hot water, it's likely a shared system issue worth mentioning to your landlord or building manager (syndic) alongside calling a plumber.

Has a breaker tripped? Electric water heaters are sometimes on their own circuit. A quick look at your consumer unit (tableau électrique) for a flipped switch takes a moment and occasionally solves it outright.

If that doesn't fix it: the more likely causes

A tripped or failed thermostat. Boilers and hot water tanks have a thermostat that can fail or need resetting — often the actual cause behind what looks like a "dead" system.

Sediment build-up in an older tank. Paris's moderately hard water leaves mineral deposits over time, which can affect an ageing tank's efficiency — more common in older buildings with original hot water systems that haven't been serviced in a while.

A pilot light or ignition fault on gas systems, which usually needs a plumber to safely diagnose rather than something to poke at yourself.

The unit has simply reached the end of its life. Older boilers, especially in older Paris buildings, do eventually need replacing rather than repairing — a plumber can tell you honestly which situation you're in rather than repeatedly patching something on its way out.

What we'll actually do

Diagnose which of these it is, explain it in plain English, and confirm a price before doing anything — whether that's a straightforward reset or a bigger repair. If it's a landlord-side repair rather than routine wear, we'll tell you that too, so you know what to raise with them.