No hot water — what to check and who to call

What to do right now

1. If you smell gas, or you see water near live electrical parts, leave the area and call your local emergency number first.
2. If the water heater is leaking, shut off the water supply to the heater or the home's main water shutoff if needed. If you need help finding it, see how to shut off your water.
3. Turn off power to an electric water heater at the breaker only if you can do it safely and without standing near water. For a gas unit, do not force anything if you smell gas.
4. Put towels or a bucket down if there is a small leak, and move boxes or valuables away from the area.
5. Check a few basics: is the hot water out at every sink and shower, or just one? Did the breaker trip? Is there a simple reset button on the unit? If you rent, tell your landlord or property manager.
6. If you have no hot water everywhere, a leak, odd noises, rusty water, or a unit that will not restart, get help fast through MainLine Match.

• Safety first if gas or electricity may be involved
• A leaking water heater can become a bigger problem quickly

When no hot water is a true emergency

No hot water is sometimes urgent, but not always a full emergency. If the heater simply stopped making hot water and there is no leak, no burning smell, no gas smell, and no electrical hazard, it may be able to wait a short time for a licensed plumber.

It is more urgent if the water heater is leaking, making loud popping or banging sounds, showing signs of corrosion, sending out rusty or discolored hot water, tripping the breaker, or if you smell gas near a gas unit. Water heater leaks can damage floors and walls. A failed heater can also leave a family without hot water for bathing, cooking, cleaning, or heat in some homes.

Call for help right away if:
- The tank is leaking or dripping heavily
- You smell gas
- Water is near wiring, outlets, or the breaker panel
- The unit is making unusual loud noises
- There is no hot water anywhere in the home and you suspect the heater has failed
- You see water stains, pooling, or damage around the heater

Quick things that may explain it

A few simple issues can cause no hot water. Sometimes the problem is only at one faucet or one shower. In that case, the issue may be local to that fixture and not the water heater itself.

Across the whole home, common causes include a tripped breaker on an electric heater, a failed heating element, a thermostat problem, a pilot or ignition issue on a gas heater, sediment buildup in the tank, an old failing unit, or a leak. Tankless systems may also stop heating because of scale buildup, venting issues, error codes, or flow-related problems.

General checks people often make:
- See whether cold water is still working normally
- Test hot water at more than one fixture
- Check for visible leaks around the heater
- For electric units, see if the breaker has tripped
- For tankless units, look for an error display
- Think about the age of the heater; older units fail more often

If anything seems unsafe, stop there and wait for a licensed plumber. This page gives general information only, not repair or safety advice.

What a water-heater repair or replacement may cost

Costs vary a lot by the real problem, the type of heater, the parts needed, your area, and whether you need after-hours service. These ranges are general information only, not quotes.

A service call or diagnostic visit may run about $80 to $250 in many areas. A smaller repair, such as a thermostat, heating element, igniter, or relief valve issue, may be roughly $150 to $600. More involved repairs can run higher, especially on tankless systems or if special parts are needed.

If the tank itself is leaking, replacement is often more realistic than repair. A basic tank water heater replacement may be around $1,000 to $3,000 or more installed in many US areas. Tankless replacement can be higher, often about $2,000 to $5,000+, depending on size, venting, gas or electrical needs, and code requirements. After-hours, weekends, and emergency calls usually cost more. You can learn more on our costs guide.

Before work starts, ask for:
- The total price in writing
- What parts and labor are included
- Whether the price is for repair or full replacement
- Whether permit or disposal costs are extra in your area
- Whether there are added after-hours charges

How to avoid overpaying in a stressful moment

When there is no hot water, it is easy to feel rushed. A good plumber should explain the likely problem in plain language, tell you what they found, and give you a written price before work starts. You stay in control: you choose who to hire, confirm the price, and confirm the work is done before paying the final amount.

Be careful with red flags like vague pricing, scare tactics, pressure to approve a huge replacement immediately, cash-only demands, or someone who will not confirm they are licensed and insured if your state or locality requires it. Costs, rules, and who is responsible for certain plumbing issues can vary by area, so local verification matters.

Ask simple questions:
- Are you licensed and insured for this work?
- Is this a repair or do you recommend replacement, and why?
- What is the full written price before work starts?
- What happens if the problem turns out to be different?
- Is this an emergency rate because of the time of day?

How MainLine Match helps you get a plumber fast

MainLine Match is a free matching service for households. We are not a plumbing company, not a licensed plumber, and we do not perform plumbing work. We help connect people across the United States, including new immigrants and non-native English speakers, with licensed, insured 24/7 emergency plumbers near them.

To get matched, we only collect basic contact and problem details: your name, phone number, optional email, problem type, ZIP code, and preferred language. We do not ask for financial account numbers, Social Security numbers, income details, or sensitive records.

If you need help now, start at get matched or visit emergency plumbing help. Tell the plumber exactly what you see: no hot water anywhere, leak or no leak, tank or tankless, gas smell or no gas smell, and whether the problem started suddenly. That helps them prepare, but no service, price, or arrival time can be guaranteed.