CHART 2

S8600 (NATURAL GAS AND LP GAS)

INTERMITTENT PILOT SYSTEM TROUBLESHOOTING

NO SPARK AT PILOT BURNER

Replace ignition module.

NO

 

NO

Turn on gas supply. turn on power supply.

 

 

 

NO

 

Securely connect cable

 

 

 

 

and/or ground wire.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

Carefully bend downward

 

 

 

 

top of ground strap

 

 

 

 

 

 

 

 

 

to achieve 1/8”

 

 

 

 

 

 

spark gap.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

Replace ignition

 

 

 

 

 

 

 

 

 

 

module.

 

 

 

 

 

 

 

 

 

 

 

 

Turn gas supply off.

Is voltage (24 Vac) across the 24 V terminals on “Call for heat”?

YES

Is voltage (24 Vac) across the PV & MV/PV terminals on

“call for heat”?

NOTE: (FOR LP MODELS ONLY) Pilot valve will be de-energized if module goes into lockout condition. Reset system by turning electrical power off or by turning system controller to “OFF” or down below “Call for heat”. Wait one minute then turn system on.

YES

Turn off power supply.

Is ignition cable firmly plugged into module?

Is green ground wire firmly attached to mounting screw

and GND terminal on module?

YES

Ensure ground strap is the closest metal to the igniter/sensor

rod (electrode) to prevent the spark from shorting out to other metal parts (pilot screen, pilot shield, etc.).

Ignition cable must not touch metal surfaces or

current carrying wires.

Is there a 1/8” gap between ground strap and electrode?

YES

Are the ceramic insulators surrounding the electrode

cracked or broken?

YES

Replace pilot burner assembly or bus bar.

25

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A.O. Smith 200M, 225M, HW-120M, 160M warranty No Spark AT Pilot Burner, Yes

HW-120M, 225M, 200M, 160M specifications

A.O. Smith is renowned for its range of advanced water heaters, and the 160M, 200M, 225M, and HW-120M models stand out as some of the most reliable and innovative options available. These water heaters are designed to deliver exceptional performance, energy efficiency, and user-friendly features, making them ideal for various residential and commercial applications.

The A.O. Smith 160M model boasts a robust design that ensures longevity and efficiency. It has a 160-gallon capacity, providing ample hot water for households with high demand. This model incorporates insulation technology that minimizes heat loss, contributing to energy savings and reduced utility bills. Additionally, it features a durable exterior that is resistant to rust and corrosion.

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All these models utilize advanced technologies such as electronic ignition and enhanced insulation materials, contributing to a reduction in energy consumption and maintenance needs. The combination of these features makes A.O. Smith appliances a smart choice for consumers looking for efficiency, reliability, and performance. With a strong commitment to craftsmanship and innovation, A.O. Smith continues to set the standard in water heater technology, ensuring customers enjoy reliable hot water access while promoting energy efficiency.