An emergency water heater repair is a visit you need today, not this week: water pouring from the tank, a relief valve that is spitting hot water or steam, a heater that smells of gas, or no hot water in a home with a baby or a person who is ill. This page is the first-hour plan. Do the shut-offs below, then request a plumber and say it is urgent.
It belongs to our main guide to water heater repair, which covers routine faults, brands and the Los Angeles permit rules. This page stays on the urgent end.
What does emergency water heater repair involve?
A plumber arrives, makes the heater safe first, then finds the fault. That means shutting off the water, gas or power, stopping the leak or venting problem, and testing the unit. If the repair is a part, it is often done in the same visit. If the tank has split, the plumber quotes a replacement and, where possible, a temporary fix.
Safety comes before comfort. A plumber will not relight a gas heater that has a venting problem, and will not leave a failed relief valve in place. If your heater needs a new tank, you still get a written quote before any work starts, even when the job is urgent, and the same Los Angeles rules for permits and earthquake straps apply as for any other replacement.
Is no hot water an emergency?
Usually no hot water is urgent but not an emergency. It becomes an emergency when there is also a leak, a gas smell, scorching hot water, a tripping breaker that will not reset, or when someone in the home is a baby, elderly or unwell and needs warm water. Cold showers are miserable, but they are not dangerous.
If the only problem is cold water, check the simple things first. Look at the breaker for an electric heater, and at the pilot light or error display on a gas or tankless one. Our guide on why you have no hot water covers the checks. If none of them restores heat, book a normal visit and ask for the earliest slot.
If you rent, tell your landlord or building manager in writing the same day. In an apartment building the heater is usually shared, so see apartment building no hot water.
What should I do the moment my water heater leaks?
Turn off the water to the heater, then the power or gas, then limit the damage. The cold water shut-off valve sits on the pipe above the tank. Close it by turning the handle a quarter turn on a lever valve or clockwise on a wheel handle. Then switch off the breaker for an electric unit, or turn the gas control to off.
Then work through this list:
- Stop the water feeding the tank. If the valve will not turn or is stuck open, close the main shut-off for the house. Our page on replacing a shut-off valve explains why old valves seize.
- Cut the power or gas. Do not step into standing water to reach an electrical panel. If the panel is wet or the floor is flooded, leave it alone and call the utility or 911.
- Open a hot tap upstairs to let the pressure off, and drain what you can with a hose from the tank's drain valve to a floor drain or outside.
- Move belongings and photograph the damage for your insurer.
Water and electricity together are dangerous. A small drip from a fitting is one thing. A tank leaking from the body is the end of that heater, and our guide on how to repair water heater leakage shows how to tell the difference.
What if I smell gas near my water heater?
Leave the building at once. Do not use switches, phones inside the house or anything that could spark. From outside, call SoCalGas on 1-800-427-2200, and call 911 if you are in danger or cannot reach SoCalGas. Do not try to fix it yourself. SoCalGas says not to rely on smell alone, because odor can fade.
Once SoCalGas has made the area safe, a plumber can find the cause. Gas piping, the heater's gas control valve and the vent are regulated work, and in California they are done by a plumber with a California contractor license, with a permit where the work calls for one. Our page on the gas line explains what the work involves.
In an earthquake, the usual advice is to shut off the gas only if you smell it or hear it hissing. See earthquake gas shut-off valves for how those valves work.
What signs mean I need emergency water heater repair?
Five signs call for same-day help: water around the base of the tank, a relief valve that discharges hot water or steam, a rotten-egg or gas smell, scorching hot water at the tap, and scorch marks, sparks or a tripping breaker near an electric heater. Any one of them is a reason to shut off supply and call.
Other signs are less urgent but should not be ignored:
- Rust-coloured hot water. It can mean the tank is corroding from the inside. LADWP says a water main disturbance can also push rusty water into a tank, so ask if the neighbors see it too.
- Rumbling or banging. This is sediment, and it is worth a service call this week.
- A tank that is more than 10 to 15 years old. The U.S. Department of Energy gives that range as the usual life of a storage heater. A failure on an old tank is likely to be a replacement.
Water that scalds at the tap means the thermostat has failed or been set too high. The U.S. Department of Energy gives about 120 degrees as the usual home setting.
What affects the price of emergency water heater repair?
Urgent visits usually cost more than a booked visit, because the plumber changes the day's schedule and may work outside normal hours. What the repair itself costs depends on the part. Published prices for Southern California put most standard tank repairs at about $150 to $650, with a service call and diagnosis at $75 to $150.
| Item | Guide range |
|---|---|
| Service call and diagnosis | $75 to $150 |
| Thermocouple, pilot or igniter | $175 to $400 |
| Most standard tank repairs | $150 to $650 |
| Major repairs on a tank heater | $500 to $1,500 |
These are guide figures from published prices and the Angi and HomeAdvisor cost guides, checked in November 2026. Ask the plumber whether the quote includes an after-hours charge, and get the total in writing before the work starts. For replacement prices see water heater replacement cost.
Prices also rise when the heater is in a tight attic or a closet, when a part has to be sourced, or when an old shut-off valve has to be replaced before anything else can happen.
Is there 24-hour water heater repair in Los Angeles?
We arrange visits through the quote form and do not promise a set arrival time, because a promise nobody has agreed to is not worth making. Tell us in the form that the heater is leaking, smelling of gas or has no hot water for a vulnerable person. The plumber who takes the job will tell you when they can come.
Be wary of anyone who promises to arrive in a fixed number of minutes at any hour at a price quoted over the phone with no details. A fair emergency quote names the fault, the part and the price. If a plumber quotes a replacement before looking at the heater, ask why.
If the heater is the only thing wrong, and the water is off at the valve, there is often time to compare quotes. Water off, power or gas off and the floor dry is a stable situation.
What about emergency water heater replacement?
If the tank has split, replacement is the only fix. Many plumbers carry common sizes, so a like-for-like swap can happen the same day. In the City of Los Angeles a plumbing permit is normally required for the replacement, unless it is done by a contractor in the LADBS contractor registration program, which covers same-size swaps.
The permit is not optional because the job is urgent. Ask the plumber who is handling it and for a copy of the paperwork. The new heater needs seismic straps and a relief valve with a discharge line. See plumber for water heater replacement and plumbing permit for a water heater for the steps.
Water heater installation follows the same steps as any replacement: remove the old tank, set and strap the new one, connect it and test it. Replacing is also the moment to think about moving to tankless, but an emergency is a poor time to make that decision. Our comparison of tank vs tankless is worth a read once the hot water is back.
Common questions
How long does emergency water heater repair take?
Many repairs take one to three hours once the plumber is on site, depending on the part. A replacement of a like-for-like tank is usually a half day. Tankless installations and anything that needs new venting or gas piping take longer. The plumber should give you an estimate of the time when they quote.
What should I ask before I hire someone for emergency water heater repair?
Ask for the total price in writing, including any after-hours charge. Ask what the fault is, what part is being replaced, whether a permit is needed, and who is responsible for it. Ask whether the plumber will check the seismic straps and relief valve discharge line. If you are told only a flat figure with no detail, ask again.
Does someone need to be at the property?
Yes, or someone you trust must be. The plumber needs access to the heater and to the water shut-off, and in Los Angeles the permit paperwork may need an owner's signature. Move stored items away from the heater first, and keep pets away from the work area.
Can I fix an emergency water heater problem myself?
You can shut off the water, power or gas, drain a leaking tank and reset a tripped breaker. You should not repair gas piping, vents or the relief valve discharge, and a replacement in Los Angeles needs a permit. When in doubt, make the heater safe and call a plumber.