Water heater repair costs $230 to $1,000 in 2026
The national average water heater repair is about $600. Small fixes like a thermostat or heating element run $100 to $350. A gas control valve is $300 to $500. If the tank itself is leaking, it cannot be repaired; a new 40 gallon tank installed is $1,200 to $2,500.
Cost by job
| Thermostat replacement | $150 to $300 |
|---|---|
| Heating element (electric) | $200 to $350 |
| Thermocouple or pilot (gas) | $150 to $300 |
| Gas control valve | $300 to $500 |
| Anode rod replacement | $200 to $300 |
| Pressure relief valve | $150 to $300 |
| Tank flush | $110 to $200 |
| Tankless unit repair | $300 to $900 |
What to know before you book
| Leaking tank | A tank that leaks from the bottom is done. Plumbers say this is the reason for most calls, and the answer is replacement, $1,200 to $2,500 installed for a standard tank. |
|---|---|
| Repair or replace | Replace if the repair costs more than half of a new unit, or if the unit is over 10 years old with a major fault. Repair a young unit with a cheap part every time. |
| Gas vs electric | Electric parts are cheaper and simpler. Gas valves and burners cost more and need a licensed plumber. |
| Tankless | Parts cost more and fewer techs know them. Expect the top of the range. |
| Emergency | Weekend or after hours calls add $75 to $150 in fees. |
| Extras | Permit $50 to $150 on some jobs, disposal $25 to $75, and an accessibility charge for units in tight closets. |
Why it costs what it costs
Most water heater calls are for no hot water, and most of those are a $150 part plus an hour of labor. The expensive outcome is a leaking tank, which is a replacement, not a repair. Knowing which of the two you have before the plumber arrives changes the conversation.
What will this cost me?
Pick the job, your state's cost level and when you need it. The estimate updates as you change them.
Estimates from published 2026 cost guides. Get a written quote before work starts.
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How much does it cost to repair a water heater?
$230 to $1,000 for most repairs in 2026, about $600 on average. Small parts are $100 to $350.
Can a leaking water heater be repaired?
A leak from a fitting or valve, yes. A leak from the tank itself, no; it needs replacing.
Should I repair or replace?
Replace if the repair is more than half the price of a new unit or the heater is over 10 years old.
How much is a new water heater installed?
$1,200 to $2,500 for a standard tank, more for tankless.