A.O. Smith Electric Water Heater 0150

Ensure adequate drainage is available before inspection

Check for factors that may increase anode rod depletion

Is the water artificially softened?

Inspect the anode rod for depletion

Does the anode rod need replacement?

Document the condition of the anode rod

Turn OFF electrical disconnect switch.

Drain the heater following Draining instructions.

Remove the banks and gaskets from the openings.

Brush loose scale from the banks.

Check all connections for tightness

Repair water leaks and tighten electrical connections as necessary

Turn on the electrical disconnect switch

Turn on the pilot toggle switch

Observe the operation of the electrical components during the first heating cycle

Check temperature control and contactor operation by allowing the heater to come up to temperature and shut off automatically

DANGER! Burn hazard. Keep clear of drain valve discharge outlet.

Turn OFF the electrical supply to the water heater at the breaker or disconnect switch.

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, then close the hot water faucet.

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

Ensure that the drain hose is secured before and during the entire flushing procedure.

Open the water heater drain valve to flush the storage tank.

Flush the water heater storage tank to remove sediment and allow the water to flow until it runs clean.

Check for signs of a depleted anode rod

Does the anode rod show signs of depletion?

Turn OFF electric supply to the water heater

Shut OFF the water supply and open a nearby hot water faucet to depressurize the water tank

Drain the tank following the proper procedures