No hot water in your apartment: what to do first

You turn on the shower and the water stays cold. When there's no hot water in your apartment, a few safe checks can sometimes fix it in minutes. If they don't, a clear report gets the owner or manager moving sooner, so you're not taking cold showers for a week while you wait for an answer.

This guide is for tenants.

Why no hot water in an apartment drags on

Losing hot water affects every shower, every load of dishes and, in winter, your health, so it deserves a quick repair. When the fix drags on, the delays tend to come from the same places:

• Nobody knows where the problem is. The heater might be in your unit, in a shared room or in the basement serving the whole building.
• The first message is vague. "No hot water, please fix" leads to questions: since when, which faucets, what kind of heater?
• The plumber arrives without the right part, because nobody sent a photo of the heater's label.
• Nobody confirms a visit time, and you stay home all day for someone who comes tomorrow.

First, stay safe

Before you touch anything, check for these signs. If you see one, stop and follow the safety steps:

• A gas smell near the heater. Don't switch anything on or off, don't light anything, leave the apartment and call 911 or the gas company's emergency line from outside.
• Water leaking from the heater or pooling around it, especially near outlets or the electrical panel. Stay out of the water and report it as urgent.
• A carbon monoxide alarm going off, or headaches, dizziness or nausea that ease when you step outside. Get everyone out into fresh air and call 911 from there.
• Smoke, fire or sparks near an electric heater. Leave and call 911 from outside.
• A scorched smell or a hot outlet with no smoke. Don't touch it, keep away from it and report it as urgent.

Our guide to emergency repairs in a rental covers what to do in those cases. No hot water on its own usually counts as urgent: report it the same day. If someone at home depends on it for their health, for example a baby or an older person in cold weather, say so when you report it.

Quick checks you can do safely

None of these need tools, and none involve opening the heater. Skip any step you're not comfortable with.

Is it every faucet, or just one?

Run hot water in the kitchen and in the bathroom. If only the shower is cold, the problem may be the shower valve itself, and the owner may send a different pro.

Do the neighbors have hot water?

In buildings with a central boiler, an outage hits everyone at once. Ask a neighbor or check the building's group chat. If it's building-wide, the building manager is the one to contact, and your owner should know too.

Electric heater: check the breaker

If your heater is electric and the panel is inside your apartment, look for a tripped breaker labeled "water heater". You can switch it back on once, with dry hands, standing on a dry floor. If it trips again, leave it off and report it, because a pro needs to look at the heater.

Gas heater: check the gas and the pilot

If there's no gas smell, note whether the stove and other gas appliances were working earlier today. Don't light them just to test the supply. If they weren't, the gas supply may be off or, with a propane tank, empty. Many tank heaters have a small window where you can see whether the pilot flame is lit. If it's out, write that down for your report. Leave the relighting to a pro unless the label on the heater explains it step by step and the owner or manager says it's fine for you to do it.

Tankless heater: check the water flow

A tankless heater only turns on when enough water flows through it. Open the hot tap fully. If hot water comes and then turns cold, mention it in your report, because it helps the pro find the cause.

Ran out after a few minutes?

If the water gets warm and then turns cold, the tank may be too small for back-to-back showers, or it may be failing. Wait an hour and try again, and note what happens.

How to report no hot water to the owner

If the checks didn't fix it, write to the owner or manager the same day, through the channel your lease names. A call is fine to start, but send a written message too and keep a copy. Include:

• When it started and whether it's all the faucets or one.
• The type of heater if you know it (electric, gas, tankless, building boiler) and where it is.
• What you checked: the breaker, the stove, the neighbors, the pilot window.
• A photo of the heater and its label, with the brand and model. A short video helps if it makes a noise or leaks.
• Your availability for a visit over the next few days.
• Anything that makes it more urgent, such as a baby at home or freezing weather.

For example:

Hi Mark, since this morning there's no hot water at Apt 4B, 18 Maple Street, in the kitchen or the bathroom. The heater is electric and sits in the hall closet. The breaker had tripped; I switched it on once at 8 AM and it tripped again, so I left it off. The neighbors in 4A have hot water. Photos of the heater and its label are attached. I'm home after 2 PM this week. Could you let me know who is coming and when?

If you hear nothing by the next day, follow up in the same message thread and add any change, such as a new leak. If that gets no reply either, call the urgent-repair number in your lease or the building's emergency contact. If days pass with no repair plan, a local housing or code-enforcement office, or a tenant-advice service, can tell you what you can do where you live.

Who pays, and how fast it should be fixed

In most rentals, the owner is responsible for repairing a water heater that fails from age or normal use. If the damage came from misuse, the cost may fall on the tenant. Your lease and local rules decide the details, and many places set deadlines for restoring hot water. Check the rules where the property is, and see our guide on who pays for repairs for the questions that decide each case.

Until it's fixed:

• Before you hire a plumber yourself, check the local rules on tenant repairs and reimbursement, and get the owner's OK in writing where they require it. Agree on a spending limit if you can, keep the invoice and don't count on getting the money back.
• Keep a short log: the date you reported it, each follow-up, who came and what they did.
• When it works again, confirm it in writing. If it fails again within a few weeks, say so in the same thread.

How RentalThread will make it easier

With RentalThread, you'll report a problem from your phone with photos or a video. AI will turn your message into a clear request with the details the owner needs, such as the heater type and what you already checked. You review it before it's sent.

Each repair will have its own thread, so your report, the owner's approval and the pro's visit stay in one place. You'll see who's coming and when, and your past repairs will stay with your lease and rent receipts. See what's planned for tenants.