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How Much Does Water Heater Repair Cost? About $150 to $1,000

By Sharrk Team · October 31, 2026

Most water heater repairs cost about $150 to $1,000, with national averages of roughly $455 to $606 depending on the cost guide. Small fixes like a thermocouple or T&P valve often land under $350, while a gas control valve or leak repair pushes toward the top of the range, and a leaking tank usually means replacement instead.

These figures come from three national cost guides: HomeGuide, HomeAdvisor and Angi. HomeAdvisor and Angi are sister sites under the same parent company, so their nearly identical numbers ($222 to $990 and $221 to $985) are best read as one data source, not two.

How much does water heater repair cost on average?

HomeGuide puts tankless repairs higher, at $300 to $1,300. On top of parts, HomeGuide reports plumbers charge $45 to $150 per hour, and many have a minimum service call fee of $50 to $200. Expect more for nights, weekends and holidays; our guide to plumber after-hours rates covers how those premiums work.

What do common water heater repairs cost?

Ranges below include parts and labor unless noted. Where a guide gave a single average instead of a range, that is shown.

A few patterns stand out:

• Parts are cheap; the visit is not. HomeGuide lists a thermocouple part at $10 to $30 and a T&P valve at $10 to $25. Most of the bill is labor and the trip.
• Electric heaters fail on elements and thermostats. Both are usually same-visit fixes.
• Gas heaters fail on the ignition side. A thermocouple, pilot assembly or igniter is a modest repair; a gas control valve is the expensive one, and HomeAdvisor notes that replacing a faulty valve is usually more cost-effective than repairing it.
• "Leak" covers a wide range. A loose fitting or dripping valve can be a quick fix. Angi notes that water in the drip pan or under the unit usually means the tank itself is leaking from internal corrosion, which calls for a new heater.

Should you repair or replace a water heater?

Replace instead of repair when any of these are true:

1. The unit is older than about 10 years. HomeGuide says tank heaters last 8 to 15 years and tankless units 10 to 20. HomeAdvisor and Angi put conventional tanks at roughly 10 to 15 years.
2. The repair costs more than half of a new unit. HomeGuide's rule: consider replacing a heater over 10 years old or when the repair is more than 50% of the replacement cost.
3. The tank itself is leaking. A corroded tank can't be patched.
4. Problems keep coming back. Angi lists rising bills, discolored water and inconsistent temperatures as signs repair money is going into a unit near the end of its life.

For comparison, a full replacement runs about $875 to $1,800 according to HomeAdvisor, about $850 to $1,800 according to Angi, and $600 to $1,800 for a new tank in HomeGuide's table. If the heater is under 10 years old and the problem is a part like an element, thermostat or thermocouple, repair is usually the better buy.

What water heater problems are emergencies?

Some calls can't wait for a quote.

• You smell gas. SoCalGas tells customers to evacuate the area immediately, then call the gas company from a safe place and call 911 if lives or property could be at risk. Do not light a flame, switch lights or appliances on or off, or try to repair the leak yourself. This Old House gives the same advice: a rotten egg smell can mean a gas leak, so leave the house and call your gas company or emergency services.
• The T&P relief valve is discharging or damaged. This valve opens to relieve pressure when temperature or pressure in the tank gets too high. This Old House recommends having a technician check it at every annual inspection and hiring a professional to replace it immediately if it shows wear or malfunction.
• Water is pooling around the unit. This Old House advises turning off the water supply and the power to the heater.
• Scalding water. The U.S. Consumer Product Safety Commission urges setting water heaters to 120°F, noting that water at 140°F can cause burns in six seconds. If a thermostat fails and the water suddenly runs much hotter, treat it as urgent.

If your area also deals with freeze damage, that is a separate repair with its own pricing; see frozen pipe repair cost.

What should a plumber ask when someone calls about a water heater?

For plumbing business owners, the first call decides whether the tech shows up with the right part. A good intake covers:

1. Is anyone smelling gas right now? If yes, tell them to leave the house and call the gas company or 911 from outside before anything else.
2. Gas, electric or tankless?
3. How old is it? The brand and the date on the label sticker help you size the job and spot a likely replacement.
4. What's happening? No hot water, not enough hot water, too hot, strange noises, rusty water or a leak.
5. If it's leaking, where from? A fitting or valve on top, the T&P valve or its pipe, or the bottom of the tank and the drip pan.
6. Have they shut off the water, power or gas?
7. Where is the heater? Garage, basement, attic or closet changes access and the damage risk.
8. Address, best callback number and when someone can be home.

Asking about age and leak location up front lets you quote a repair or tell the customer to expect a replacement estimate before the truck rolls. Our plumbing emergency call script has wording you can adapt.

How Sharrk answers water heater calls 24/7

No-hot-water calls don't wait for business hours. Sharrk is an AI voice and text agent that answers every call 24/7, asks your intake questions, books the job onto Sharrk's calendar, Calendly, Cal.com or ServiceTitan, and can live-transfer to a person when you want a human on the line, such as a caller reporting a gas smell. New leads from web forms, Angi, Thumbtack and Networx get a reply in under 30 seconds by call, text or email.

You don't have to write a script from scratch: describe how you handle water heater calls in plain English, and Mako, Sharrk's assistant, builds the agent for you to test. See how it works for plumbers on our AI receptionist for plumbing page.

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Sources

• HomeGuide, "How much does water heater repair cost?" (no update date shown; checked October 31, 2026)
• HomeAdvisor, "How Much Does a Water Heater Repair Cost in 2025?" (2025 data, no exact update date shown; HomeAdvisor and Angi are sister sites; checked October 31, 2026)
• Angi, "How Much Does It Cost to Repair a Hot Water Heater? (2025 Data)" (2025 data, no exact update date shown; sister site of HomeAdvisor; checked October 31, 2026)
• This Old House, Leland Stone, "Water Heater Safety 101" (updated June 7, 2026; checked October 31, 2026)
• SoCalGas, "Natural Gas Leaks" (utility safety page; checked October 31, 2026)
• U.S. Consumer Product Safety Commission, "Avoiding Tap Water Scalds" (Publication 5098) (no date shown, older publication; checked October 31, 2026)

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