A.O. Smith AOSRE50400 warranty High Limit Switch Removal and replacement, Service

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water inlet and outlet, open the nearest hot water tap and follow filling instructions.

5.Follow instructions for replacing the element in “ELEMENT CLEANING/REPLACEMENT.”

Never use this water heater unless it is completely full of water. To prevent damage to the tank and heating element, the tank must be filled with water. Water must flow from the hot water faucet before turning “ON” power. The manufacturer will not warrant any elements damaged by failure to follow instructions.

15.Check element for water leaks. If leakage occurs, tighten element. If necessary drain tank before repeating Steps 7 and 8, remove element and reposition gasket. Then repeat Steps 10 through 15.

16.Replace the two spade connectors on element into their original positions.

17.Replace the mounting bracket with the center rise facing outward and the screw hole up, see Figure 10.

18.Replace the insulation and front panel, lining up the three tabs at the top with the slots in the casing.

19.Replace the retaining screw and the temperature knob.

20.Plug heater into electrical outlet.

FIGURE 10.

TO REMOVE AND REPLACE ANODE:

1.Follow steps 1-8 of the Element Cleaning/Replacement section.

2.Using a 7mm wrench, remove the nut securing the anode.

3.Unscrew and remove anode.

4.Screw in the new anode and secure with the retaining nut.

High Limit Switch Removal and replacement

1.Turn off and unplug the heater from the electrical outlet.

2.Remove the front panel, see the “REMOVING THE FRONT PANEL” section in this manual. Remove the insulation pad. Remove personnel barrier.

3.Remove the four wires connected to the switch, taking care to note the original placement of each wire.

4.Using a 7mm wrench, remove the nuts securing the high limit switch to the tank enough to rotate the switch 90° counterclockwise and slide it out from beneath the bracket. It is not necessary to remove the nuts completely.

5.Place the new switch beneath the bracket and rotate it 90° clockwise.

NOTE: The taller spade terminal will be on the right side.

figure 11.

6.Replace and tighten the nuts so the high limit switch is firmly in contact with the tank surface.

7.Replace the four wires, taking care that they are replaced into their original positions and tighten screws.

8.Replace personnel barrier; replace insulation block and the front panel.

Service

If a condition persists or you are uncertain about the operation of the water heater contact a service agency.

Use this guide to check a “Leaking” water heater. Many suspected “Leakers” are not leaking tanks. Often the source of the water can be found and corrected.

If you are not thoroughly familiar with your water heater and safety practices, contact a qualified installer to check the water heater.

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Contents Residential Electric Safe INSTALLATION, USE and Service Important DefinitionsGeneral Safety Table of Contents IntroductionTypical Installation Mixing Valve Usage Hotter Water can ScaldRead ALL Instructions Before Using this Water Heater Locating the NEW Water HeaterFacts to Consider About the Location Insulation BlanketsMounting Installing the NEW Water HeaterWater Piping Temperature- Pressure Relief Valve Water Piping Pressure TestFilling the Water Heater Wiring Diagram Wiring Temperature Regulation Temperature Adjustment Thermal Expansion For Your Information Operational Conditions Periodic Maintenance Temperature-Pressure Relief Valve OperationAnode ROD Inspection DrainingThermostat Removal / Replacement Element Cleaning / ReplacementReplacement RemovalService High Limit Switch Removal and replacementTo Remove and Replace Anode Leakage Checkpoints Troubleshooting Guidelines Problem Possible Causes Corrective ActionRepair Parts List Residential Electric Warranty Conditions and ExceptionsService and Labor Responsibility Claim ProcedureLimitation on Implied Warranties DisclaimersPage