Water Heater Repair vs. Replacement Cost

Water heater repairs usually cost $150 to $750, with an average of $450 (Fixr). Replacing the heater usually costs $900 to $3,000, with an average around $1,400 (Fixr). Repair usually makes sense on a younger heater with one failed part; a leaking tank or an older heater often points to replacement.

This guide lists what each common repair costs, what a new heater costs by type and size, and how to decide between the two. Every figure is a national range from the page it links to. Prices near you may differ, so use these as a guide to what's normal, not as a quote.

First, is it safe?

Before you think about cost, check for anything dangerous:

• If you smell gas near a gas water heater, leave the house now. Take everyone with you, don't use light switches, appliances or a phone inside, and call 911 or your gas utility from outside. Don't go back in until they say it's safe.
• If water is spraying or pouring from the relief valve, stay clear. The water can scald. Turn the heater off: switch off the breaker for an electric heater, or set the gas control to Pilot or Off.
• If the tank is leaking, turn off the cold water supply to the heater, then turn off the power or gas. Keep away from any water near outlets, cords or the heater's electrical parts.

Once things are safe, you have time to figure out whether it's a repair or a replacement.

How much does water heater repair cost?

Fixr puts the typical repair at $150 to $750, with an average of $450 (Fixr). This Old House gives the same $150 to $750 range (This Old House).

The type of heater makes some difference:

• Electric: $100 to $650 (Fixr)
• Gas: $150 to $750 (Fixr)
• Tank: $150 to $750 (Fixr)
• Tankless: $100 to $650 (Fixr)

Labor is a big part of the bill. Fixr says pros may charge $50 to $150 an hour (Fixr).

Urgent repairs cost more. Fixr says to expect $100 to $200 in extra charges for urgent work (Fixr).

What do common water heater parts cost to replace?

Most repairs come down to one part. Here are Fixr's ranges, parts and labor included, all from Fixr's water heater repair guide:

• Heating element (electric): $200 to $750 (Fixr)
• Thermostat: $100 to $250 (Fixr)
• Thermocouple (gas): $150 to $325 (Fixr)
• Gas control valve: $150 to $300 (Fixr)
• Temperature and pressure relief valve: $100 to $250 (Fixr)
• Anode rod: $125 to $300 (Fixr)
• Dip tube: $100 to $250 (Fixr)
• Leak repair: $50 to $600, depending on the cause and how bad it is (Fixr)

What does each part do, and what are the signs it's failing?

Heating element. Electric heaters use one or two metal elements inside the tank to heat the water. A failed element is a common reason an electric heater gives no hot water, or hot water that runs out fast. A pro will test each element and its wiring with a meter.

Thermostat. The thermostat tells the element or burner when to turn on. A faulty one can leave water lukewarm or stop heating altogether. A pro will check the setting and whether it's switching the heat on.

Thermocouple and pilot. On many gas heaters, the thermocouple is a small sensor that keeps the pilot lit. If the pilot won't stay lit, the thermocouple is a likely cause. A pro will check the pilot, the thermocouple and the gas supply.

Gas control valve. This valve controls the gas to the burner. If it fails, the heater may not light or may not keep heating. Gas parts are a job for a pro.

Temperature and pressure relief valve. This safety valve opens if the tank gets too hot or the pressure gets too high. Water coming from it can mean a pressure or temperature problem, a worn valve, or water expanding as it heats. A pro will check the tank's temperature and pressure and whether the home needs an expansion tank, not just swap the valve.

Anode rod. This metal rod inside the tank corrodes on purpose so the tank doesn't. Once it's used up, the tank itself starts to rust. Rheem suggests replacing it every 3 to 4 years (Rheem). Rusty or smelly hot water can be a sign it's worn.

Dip tube. This tube sends cold water to the bottom of the tank to be heated. If it breaks, cold water mixes with hot water at the top, and your hot water runs out quickly.

What does water heater maintenance cost?

Regular care can help a tank last longer and work better. Fixr says a maintenance service typically costs $100 to $250 (Fixr).

Fixr also says most people pay around $450 to have a tank flushed to remove mineral deposits (Fixr).

Rheem recommends flushing a tank heater once a year to clear sediment (Rheem). Sediment can cause rumbling or popping sounds and make the heater work harder.

How much does it cost to replace a water heater?

Fixr puts the average installed cost around $1,400, with most homeowners paying between $900 and $3,000 (Fixr). Another Fixr guide gives a range of $600 to $3,500 for replacing a water heater (Fixr). This Old House lists water heater installation at $800 to $2,000 (This Old House).

What does a new water heater cost by type?

Installed prices by type, from Fixr's installation guide:

• Tank-style: $600 to $2,500 (Fixr)
• Tankless: $1,000 to $4,000 (Fixr)
• Indirect (heated by a boiler): $1,200 to $4,500 (Fixr)
• Heat pump or hybrid: $1,200 to $4,600 (Fixr)

This Old House puts tankless water heaters typically in the $1,000 to $1,800 range (This Old House).

What does a new water heater cost by fuel?

• Electric: $500 to $3,500 (Fixr)
• Natural gas: $700 to $2,700 (Fixr)
• Propane: $700 to $2,500 (Fixr)
• Oil: $1,200 to $4,500 (Fixr)
• Solar: $1,700 to $5,500 (Fixr)

What does a new tank water heater cost by size?

Bigger tanks cost more. Installed ranges by tank size:

• 30 gallons: $550 to $2,100 (Fixr)
• 40 gallons: $550 to $2,300 (Fixr)
• 50 gallons: $700 to $2,500 (Fixr)
• 75 gallons: $1,100 to $3,400 (Fixr)
• 80 gallons: $1,200 to $3,600 (Fixr)

A replacement is usually the same size as the old one unless your household has changed. If you often run out of hot water, ask whether a larger tank or a different type would help.

What else is included in a replacement?

The heater itself is only part of the price. Other costs to ask about:

• Labor: $300 to $1,500 on average, or 18% to 50% of the total (Fixr)
• Hourly rate: $45 to $200 an hour, depending on experience and location (Fixr)
• Removing and disposing of the old heater: $75 to $500, including dumping fees (Fixr)
• Permits: typically $25 to $1,500, depending on where you live (Fixr)
• Power venting: a power vent and its electrical connection can add $300 to $1,000 (Fixr)
• New utility lines: $400 to $1,800 to rough in utilities when installing a heater where there wasn't one (Fixr)

This Old House notes that while most plumbing repairs don't need permits, water heater replacements usually do. Ask the installer whether the price includes the permit and who will pull it.

Switching types costs more than a like-for-like swap. Going from a tank to tankless, or from gas to electric, can mean new gas lines, wiring or venting. Fixr notes that these conversions add cost, so ask for them to be listed as separate lines on the quote.

How long does a water heater last?

Lifespan is the biggest factor in the repair-or-replace choice. Sources give similar ranges:

• Tank heaters: Rheem says traditional tank heaters typically last 8 to 12 years (Rheem). Fixr gives the same 8 to 12 years (Fixr).
• Tankless heaters: Rheem says tankless models can last 15 to 20 or more years with proper care (Rheem). Fixr gives 15 to 20 years (Fixr).

Fixr notes that units near or past this range are more likely to fail. Hard water, sediment and skipped maintenance can shorten a heater's life.

How do you find out how old your water heater is?

Look at the label on the side of the tank. It shows the brand, model and serial number. Many makers code the manufacture date into the serial number. If you can't decode it, search the brand name with "serial number date" or ask the plumber to check during the visit.

Should you repair or replace your water heater?

Here's a simple way to think it through. These are rules of thumb, not hard lines, and a pro will look at your heater's actual condition.

Repair usually makes sense when:

• The heater is fairly young. Fixr says repairs might be the better choice on younger heaters (Fixr).
• One part has failed. An element, thermostat, thermocouple or valve can often be replaced for much less than a new heater.
• The tank itself is sound. A leak from a loose fitting or a valve can often be fixed.
• This is the first real problem. One repair in several years is normal wear.

Replacement usually makes sense when:

• The tank is leaking. Rheem notes that a leak from the base of the tank often means internal corrosion, and replacement is then usually the only sound fix. Fixr also notes that some leaks are cracks in the tank itself.
• The heater is near or past its expected life. For a tank heater, that's roughly 8 to 12 years.
• The repair costs a lot compared with a new heater. Rheem's rule of thumb: if repair costs exceed 50% of the price of a new unit, replacement is almost always the better investment (Rheem).
• The quote is high. Fixr says that if a repair is quoted at $1,000 or more, a replacement heater might be the better value (Fixr).
• You've had several repairs. Rheem points to multiple repairs in a short time as a sign it's time to replace.
• The hot water is rusty, or the tank rumbles. Rheem lists rusty or discolored hot water and persistent rumbling or popping as signs a unit is failing.

Is a warranty worth checking first?

Yes. Look at the label or your paperwork for the install date and warranty, and check what it covers and for how long. If the heater is still covered, the repair or even the tank may cost less. Ask the plumber whether the work they're quoting is covered.

What signs point to a specific problem?

The symptom often hints at the cause. These are likely causes, not a diagnosis. A pro will confirm before replacing anything.

• No hot water, electric heater: likely a tripped breaker, a failed element or a faulty thermostat.
• No hot water, gas heater: likely a pilot that won't stay lit, a thermocouple, or a gas valve.
• Hot water runs out fast: sediment, a failed lower element, a broken dip tube, or a tank too small for the household.
• Water at the base of the tank: a loose fitting or valve, or a leak in the tank itself.
• Water from the relief valve: high temperature or pressure, a worn valve, or water expanding as it heats.
• Rusty or smelly hot water: a worn anode rod or rust inside the tank.
• Rumbling or popping: sediment buildup at the bottom of the tank.

If you'd like a short summary of the likely causes and costs for your heater's type, age and symptoms, answer a few quick questions: Check my plumbing.

Is a tankless or heat pump water heater worth the extra cost?

If you're replacing anyway, you may be offered a different type. Each has trade-offs.

Tank heaters cost the least up front and are the simplest swap, since the plumbing, venting and power are usually already in place. They keep a tank of water hot all the time, and they run out once that tank is used up.

Tankless heaters heat water only as you use it, so they don't run out in the same way. They cost more to buy and install, and switching from a tank can mean a larger gas line, new venting or new wiring. On the other hand, they tend to last longer. Rheem says tankless models can last 15 to 20 or more years, compared with 8 to 12 for a traditional tank. Ask the installer what maintenance a tankless model needs, especially if your water is hard.

Heat pump (hybrid) heaters move heat from the surrounding air into the water instead of making heat directly. They cost more up front and need space and airflow around them, so they don't fit every closet or utility room.

A few questions help you decide:

• How long do you plan to stay? A longer-lasting heater makes more sense if you'll be in the home for years.
• Do you often run out of hot water? If so, ask whether a bigger tank or a tankless heater would fix it.
• What would the switch involve? Ask the installer to list any new gas line, venting, wiring or drain work as separate lines on the quote.
• Are there rebates? Some utilities and states offer rebates for efficient water heaters. Ask your utility or the installer what's available where you live.

What can you safely do yourself?

Some checks are reasonable for a homeowner and can save a service call:

• Check the breaker. For an electric heater with no hot water, look for a tripped breaker labeled for the water heater. If it trips again after you reset it, stop and leave it for a pro.
• Check the pilot on a gas heater. Many gas heaters have a small window to see the pilot flame. If it's out, follow the relighting steps on the heater's label. If you smell gas at any point, stop and leave the house.
• Check the thermostat setting. Someone may have turned it down, or it may have been bumped.
• Look for the source of water. Dry the area and watch where new water appears. Water from a nearby pipe, the drain valve or the relief valve pipe tells a plumber something different from water under the tank.

Leave these to a pro: anything involving gas lines or gas valves, replacing elements or thermostats inside the electrical cover, and draining a tank that may be leaking or failing. Hot water can scald, and water near electrical parts is a shock risk.

What questions should you ask for a fair quote?

Whether you're looking at a repair or a new heater, these questions help you compare quotes:

1. What do you think failed, and how did you confirm it?
2. Is there a service-call fee, and does it go toward the repair?
3. Is this part covered by my heater's warranty?
4. Given my heater's age, would you repair or replace it, and why?
5. If I replace it, what size and type do you recommend, and why?
6. Does the price include removing the old heater, the permit and any venting or expansion tank work?
7. Are parts and labor listed separately?
8. Is your work guaranteed, and for how long?
9. Are you licensed and insured for gas work in this state? Ask this for any gas heater.

For a replacement, it's normal to get more than one quote. Ask each company to price the same size and type so you're comparing like with like.

How do water heater costs compare with other plumbing jobs?

A water heater repair sits in the middle of the range for plumbing work. For hourly rates, service-call fees and what other common jobs cost, see the plumber cost guide. If water from a heater leak has spread under a floor or you hear water running with every tap off, the problem may be a pipe rather than the heater; the slab leak repair cost guide explains how those are found and fixed.

The bottom line

Most water heater repairs cost $150 to $750 (Fixr), and most replacements cost $900 to $3,000 (Fixr). A single failed part on a younger heater is usually worth repairing. A leaking tank, a tank heater near or past the 8 to 12 year mark, or a repair that costs more than half the price of a new one usually points to replacement.

Start with safety, find the heater's age on its label, and ask the plumber to explain both options with prices in writing.