A.O. Smith Gas Water Heater BTRC400

Shut off gas supply to the heater

Remove outer cover plate from lower side of heater jacket

Remove hex head screws securing tank cleanout plate

Remove lime, scale, or sediment carefully

Inspect cleanout plate gasket for damage

Burner Characteristics Verification

Is there any accumulation of lint or foreign material blocking air openings?

Check that burner venturi and ports are free of foreign matter

Clean burners with bristle brush and/or vacuum cleaner

Ensure burner ports or pilot location are not distorted

Reinstall burners in unit ensuring correct installation in support brackets

CAUTION: Property Damage Hazard

Inspection and Replacement Guidelines

Inspect the anode rod for corrosion or pitting

Is the anode rod corroded or pitted?

Is the water artificially softened?

Determine the condition of the anode rod

Does the anode rod need replacement?

Measure the depth of lime buildup in the heater

Record the depth of lime buildup in inches

Is the water heater operating efficiently?

Describe any efficiency issues observed

Water Softening Equipment Check

Is the water softening equipment functioning properly?

Describe any issues with the water softening equipment

Draining the Water Heater Storage Tank

Turn off the electrical supply to the water heater

Turn off the gas supply at the Main Gas Shutoff Valve if the water heater is going to be shut down for an extended period

Ensure the cold water inlet valve is open

Open a nearby hot water faucet and let the water run until the water is no longer hot

Close the cold water inlet valve to the water heater

Connect a hose to the water heater drain valve and terminate it to an adequate drain

Open the water heater drain valve and allow all the water to drain from the storage tank

Close the water heater drain valve when all water in the storage tank has drained