37
TROUBLESHOOTINGTROUBLESHOOTING
CHECKLIST
NOT ENOUGH OR NO HOT WATER
1. Be certain the electrical disconnect switch serving the water
heater is in the ON position.
2. Check the fuses.
• The electrical disconnect switch usually contains fuses.
• The heater has fusing.
3. If the water was excessively hot, and is now cold, the high limit
switch may have activated.
• See
Temperature Regulation
(page 18) for more informa-
tion on how to reset the ECO high limit controls.
4. The capacity of the heater may have been exceeded by a large
demand for hot water.
• Large demands require a recovery period to restore wa-
ter temperature.
5. Cooler incoming water temperature will lengthen the time required
to heat water to the desired temperature.
6. Look for hot water leakage.
7. Sediment or pipe scale may be aecting water heater operation.
ABNORMAL SOUNDS
8. Sediment or lime scale accumulations on the elements causes
sizzling and hissing noises when the heater is operating.
• The sounds are normal, however, tank bottom and ele-
ments should be cleaned. See
Maintenance
(page 34).
9. Some of the electrical components of the water heater make
sounds which are normal.
• Contactors will “click” or snap as the heater starts and
stops.
• Transformers and contacts often hum.
WATER LEAKAGE IS SUSPECTED
Refer to Leakage Checkpoint on the following page.
10. Check to see if the heater drain valve is tightly closed.
11. If the outlet of the relief valve is leaking it may represent:
• Excessive water temperature.
• Faulty relief valve.
• Excessive water pressure.
12. Excessive water pressure is the most common cause of relief
valve leakage. It is often caused by a “closed system”. See
Closed
Water Systems
(page 13) and
Thermal Expansion
(page 13) for
more information.
13. Examine the area around the element for gasket leakage.
• Tighten elements or, if necessary, follow procedures in
Lime Scale Removal
(page 35). to replace gaskets.
IF YOU CANNOT IDENTIFY OR CORRECT THE SOURCE OF
MALFUNCTION
14. Turn the power supply to the water heater o.
15. Close the supply water inlet valve to the heater.
16. Contact a Qualied Service Agency in your area. Call the toll free
phone number on the back cover of this Instruction Manual for
assistance in locating a service agency in your area.
REPLACEMENT PARTS
Call the toll free phone number on the back cover of this instruction
manual for assistance in locating replacement parts. When ordering
parts, specify the complete model number, serial number, quantity,
and name of the part desired. See
Model And Rating
(page 10)
.
Standard hardware items should be purchased locally.
Printed on 5/6/2022 7:17 AM CT
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