Should I Repair or Replace My Water Heater?

What this costs

When repair usually makes sense

Rheem, a manufacturer, describes these as the better cases for a repair:

• The problem is a replaceable part, such as a heating element, thermostat or anode rod
• The leak is a small one at a valve or fitting
• The unit is under about 6 to 8 years old, with no tank corrosion

When replacement usually makes sense

These signs point the other way:

• Water is leaking from the tank itself
• You see rust in the hot water or corrosion on the unit (ENERGY STAR)
• It is more than 10 years old (ENERGY STAR); Rheem says units that age are more likely to fail again soon after a repair
• It has needed several repairs in a short time (Rheem)

Run the numbers

Rheem's rule of thumb is that if a repair costs more than 50% of the price of a new unit, replacement is almost always the better investment. That is one manufacturer's guidance, not a standard, and manufacturers sell new units. Our replacement estimate is on this page. We don't have a water heater repair estimate, so get a repair quote and compare the two.

Don't wait on a leak

ENERGY STAR warns that a sudden failure can bring water damage and a rushed purchase. See our guide to a leaking water heater for what to do right now.

Water Heater Leaking? What to Do Right Now

Common questions

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Last verified 2026-11-03

General information, not professional advice. Conditions, codes and prices vary. Turn off power, gas or water before any work, and hire a licensed professional when in doubt. Cost figures are our estimates, not quotes.