TROUBLESHOOTING GUIDELINES

These guidelines should be utilized by a qualified service agent.

Problem

Possible Cause(s)

Corrective Action

 

 

 

WATER LEAKS

Improperly sealed, hot or cold supply

Tighten threaded connections.

(See Leakage Checkpoints on 19)

connection, relief valve or drain valve.

 

 

 

 

 

Leakage from other appliances or water lines.

Inspect other appliances near water heater.

 

 

 

NO HOT WATER

No power to heater.

Turn on electrical switch. Check for blown

 

 

fuses or tripped breaker.

 

High Temperature Limit Switch open.

Reset. Check for source of trouble and correct.

 

 

 

 

Non-functioning upper thermostat.

Replace thermostat.

 

 

 

INSUFFICIENT HOT WATER

Non-functioning thermostats.

Replace thermostats.

 

 

 

 

Non-functioning lower element.

Replace element.

 

 

 

 

Improper calibration.

Replace thermostats.

 

 

 

 

Thermostats set too low.

Set thermostats to desired temperature.

 

 

 

 

Sediment or lime in tank.

Drain. Determine if water treatment is needed.

 

 

 

 

Heater too small for job.

Install adequate water heater.

 

 

 

 

Wrong piping connections.

Correct piping.

 

 

 

 

Leaking faucets.

Repair faucets.

 

 

 

 

Wasted hot water.

Review and reduce hot water consumption.

 

 

 

 

Long runs of exposed pipe.

Insulate piping.

 

 

 

 

Hot water piping on outside wall.

Insulate piping.

 

 

 

HIGH OPERATION COSTS

Improper Calibration.

Replace thermostats.

 

 

 

 

Thermostats set too high.

Set thermostat to desired setting.

 

 

 

 

Sediment or lime in tank.

Drain. Flush-Provide water treatment if needed.

 

 

 

 

Heater too small for job.

Install adequate heater.

 

 

 

 

Wrong piping connections.

Correct piping.

 

 

 

 

Leaking faucets.

Repair faucets.

 

 

 

 

Wasted hot water.

Review and reduce hot water consumption.

 

 

 

 

Long runs of exposed piping.

Insulate piping.

 

 

 

 

Hot water piping in exposed wall.

Insulate piping.

 

 

 

SLOW HOT WATER RECOVERY

Non-functioning upper element.

Replace element.

 

Non-functioning lower element.

Replace element.

DRIP FROM RELIEF VALVE

Excessive water pressure.

Use Pressure Reducing Valve and Pressure

 

 

Relief Valve.

 

Closed system.

See “Thermal Expansion” in the For Your

 

 

Information section.

THERMOSTAT DOES NOT SHUT OFF

Non-functioning thermostats.

Replace thermostats.

 

 

 

 

Improper calibration.

Replace thermostats.

 

 

 

WATER ODOR

Sulfides in the water.

See “Operational Conditions” in the For Your

 

 

Information section.

WATER HEATER SOUNDS

Scale accumulation on elements.

Contact dealer to clean or replace elements.

 

 

 

20

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A.O. Smith EJCN-40, EJC-30, ECT-80, ESTT-30, ESTT-40 Troubleshooting Guidelines, Problem Possible Causes Corrective Action
Page 19 Page 21

ECL-30, ECT-55, ECT-40, ECT-52, ECT-80 specifications

A.O. Smith is a well-respected name in the water heating industry, renowned for its innovative products and technologies. Among its notable offerings are the EJCN-40 and ECLN-40 electric water heaters, as well as the ECS-50 model. These units exemplify A.O. Smith's commitment to efficiency, durability, and user convenience.

The A.O. Smith EJCN-40 is a reliable and efficient electric water heater with a 40-gallon capacity. It features a foam-insulated tank that ensures minimal heat loss, allowing for increased energy efficiency. This model is equipped with two heating elements, providing faster recovery times and ensuring a steady supply of hot water when needed. The EJCN-40 is designed with a user-friendly thermostat that facilitates easy temperature adjustments, enhancing overall user experience.

Similarly, the ECLN-40 shares many features with the EJCN-40 but is specifically designed for commercial applications. This model prioritizes performance and energy efficiency, making it ideal for businesses that require a dependable hot water supply. The ECLN-40 is built with an impressive heat exchanger that maximizes heat transfer, minimizing energy consumption while maintaining optimal performance.

The A.O. Smith ECS-50 stands out with a 50-gallon capacity, catering to residential and light commercial settings. This unit features a high-quality glass-lined tank, which not only provides superior insulation but also helps prevent corrosion. The ECS-50 is designed with a heavy-duty anode rod that extends the life of the tank by minimizing the risk of rusting. Its compact design allows for versatility in installation, while the integrated thermostat provides ease of use.

A.O. Smith's water heaters are equipped with advanced safety features, including automatic temperature controls and pressure relief valves, ensuring safe operation. Additionally, these models come with Energy Star certification, indicating their compliance with strict energy efficiency standards.

In summary, the A.O. Smith EJCN-40, ECLN-40, and ECS-50 water heaters combine cutting-edge technology with robust design to deliver efficient, dependable hot water solutions. With features that cater to both residential and commercial needs, A.O. Smith continues to set the standard for quality and performance in the water heating industry.
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