How much does water heater repair cost?
Most tank water heater repairs cost $150 - $700. Small parts like a thermocouple, thermostat, heating element, valve, or igniter are usually worth repairing on a younger unit. A leaking tank, repeated failures, or a unit around 10-12 years old usually deserves a replacement quote too.
The question is not only the repair price. Ask how old the heater is, whether the tank itself is leaking, whether the repair touches gas or electrical work, and whether the quote would be better applied toward a new unit with a warranty.
Water heater repair cost by problem
Pilot, thermocouple, or igniter problem
$150 - $450How to tellGas water heater has no hot water, pilot will not stay lit, or burner will not fire
The fixRelight if safe, then replace thermocouple, igniter, flame sensor, or pilot assembly if it keeps failing
Electric heating element or thermostat
$200 - $600How to tellElectric tank makes lukewarm water, runs out fast, or breaker trips after reset
The fixTest upper/lower elements and thermostats, replace failed part, and confirm wiring is safe
Valve, expansion tank, or connection leak
$150 - $700How to tellLeak is from a pipe connection, drain valve, T&P valve, or expansion tank rather than the tank body
The fixReplace failed valve, fitting, connector, or expansion tank and verify water pressure
Sediment, popping, or poor recovery
$75 - $300 service; replacement if severeHow to tellTank rumbles or pops, hot water runs out quickly, or recovery has slowed over time
The fixFlush/descale if the tank is not too old; replace if sediment has hardened or the tank is near end of life
Tankless maintenance or repair
$150 - $350 maintenance; $300 - $1,300+ repairHow to tellTankless unit shows error codes, flow problems, ignition issues, or needs annual descaling
The fixFlush/descale, clean filters, diagnose sensors/ignition/heat exchanger, and confirm gas and venting
Tank itself is leaking
$1,200 - $3,500+ replacementHow to tellWater pools from the bottom seam or tank body, not from a fitting or valve
The fixReplace the water heater. Tank-body leaks are not practical repairs.
Before approving a repair
- Find the manufacture date or installation date. Repairs make the most sense on tank units under 8 years old and tankless units still well inside expected service life.
- Identify where any leak is actually coming from. A valve or fitting leak may be repairable; a tank-body leak usually is not.
- For electric heaters, reset a tripped breaker once only. If it trips again, stop resetting it and call a pro.
- For gas heaters, do not work around the gas valve if you smell gas or the pilot will not stay lit. Leave and call the gas utility if there is any gas odor.
Unlock the hiring checklist
Use this before you call a plumbing, so you know what to ask and what to avoid.
Call a pro when…
- There is no hot water and relighting or breaker reset does not solve it
- The breaker trips again after reset
- A gas pilot will not stay lit
- Water is leaking from the tank body or bottom seam
- The unit is older and the repair quote is more than about one-third of replacement cost
Repair or replace?
Repair is usually right for one clear failed part on a younger heater. Replacement is usually smarter when the tank leaks, the unit is near or past expected life, the repair is expensive, or multiple parts are failing. Ask for two numbers on older units: the repair price today and the installed replacement price with permit, disposal, expansion tank, pan, venting, and code upgrades clearly listed.
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Related questions
Is it worth repairing a 10-year-old water heater?
Sometimes, but only for a cheap, clear repair. At 10 years or older, get a replacement quote alongside the repair quote because another failure may follow soon.
Can a leaking water heater be repaired?
A leak from a fitting, drain valve, T&P valve, or expansion tank may be repairable. A leak from the tank body or bottom seam usually means replacement.
Why is tankless repair more expensive?
Tankless units have sensors, controls, burners, heat exchangers, venting, and flow parts that take more diagnostic time. Maintenance is cheaper than major repair, so annual flushing matters in hard-water areas.
Should I call a plumber or an electrician?
Most water heater service starts with a licensed plumber. If the issue is a dedicated circuit, breaker, or wiring problem, the plumber may recommend an electrician too.