Water Heater Service & Maintenance

A practical homeowner schedule

Use the owner's manual as the controlling maintenance schedule. As a general planning rule, visually inspect the water heater and surrounding area several times a year and consider a professional service visit about once a year, especially for gas-fired tankless equipment, hard-water areas, older equipment or heavy-use households.

Tank water heaters

Watch for rust, moisture, unusual noises and signs of leakage around the tank and piping.
Sediment can collect in the bottom of the tank. Once a year, if the manufacturer’s instructions allow it, attach a garden hose to the drain valve and run water through the valve for about one minute to help carry sediment out. Route the hose to a safe drain because the water may be dangerously hot. This simple maintenance can help prolong the life of the tank; heavier buildup or poor flow may require a complete professional flush.
If the system has a thermal expansion tank, have its bladder and air charge checked annually. A waterlogged tank, a tank that will not hold its air charge, or one showing leakage or corrosion should be replaced with a properly sized, potable-water-rated tank. Shop water-heater expansion tanks on Amazon.
Many tanks use a sacrificial anode rod that eventually wears out; replacement timing varies.
Combustion, venting, burner condition and safety controls should be evaluated by a qualified technician when applicable.

Tankless water heaters

Mineral scale can reduce heat-transfer performance, especially with hard water.
Many manufacturers call for periodic descaling or flushing; frequency depends heavily on water hardness and use.
Air-intake screens, condensate components, burners and venting may require inspection or cleaning depending on model.
Error codes, temperature swings or repeated shutdowns are reasons to service the unit rather than repeatedly resetting it.

How often?

Several times a year: look for leaks, corrosion, unusual sounds or error messages.

About annually: review the manufacturer's service schedule and arrange professional maintenance when recommended.

More often: hard water, high household demand, older equipment, visible scale or manufacturer-specific requirements may justify shorter intervals.

Call for service when you notice

Water around the appliance or relief piping
Rust, corrosion or discoloration
Unstable hot-water temperature
Repeated fault codes or shutdowns
Rumbling, popping or other new noises
Combustion odors, soot or venting concerns

Research the work—and know when to call a pro

You can research routine water-heater service and replacement and decide whether it is work you can safely do yourself. Read the manufacturer’s instructions, understand the electricity, fuel-gas, combustion, hot-water and pressure hazards, and check whether your local rules require a permit or licensed installer. If you have any doubt, call a qualified professional.

Remember that prices vary. Always get a few written quotes and compare the complete scope of work—not only the bottom-line number. Tank quality, warranty coverage, installation materials and local labor rates can be substantially different from one quote to another.

Need help finding someone? Hit us up. We have vendor referrals for your area, and local professionals understand the codes and permit requirements that apply where you live.