A.O. Smith HW 610 warranty Yes

CHECKING HONEYWELL S-8600H OR S-8610M

INTERMITTENT IGNITION CONTROLS

NO SPARK AT PILOT BURNER

Replace ignition module.

NO

NO

Turn off gas supply.

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

YES

Is voltage (24 Vac) across the PV & MV/PV terminals on “call for heat”?

YES

NOTE: S8610M will automatically reset every 5 minutes. S8600H 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.

Turn on gas supply.

Turn on power supply.

	NO
Securely connect cable
and/or ground wire.

Replace pilot burner	NO
and/or ground wire.

	NO
Carefully bend downward
top of ground strap
to achieve 1/8”
spark gap.
	NO
Replace Ignition
Module.

YES

Turn off power supply.

Is ignition cable firmly plugged into pilot assembly and module?

Is ground wire firmly attached to pilot assembly and GND terminal on module?

YES

Are ignition cable and ground wire in good condition (not brittle, burnt or cracked)?

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

Is the ceramic insulator surrounding the electrode cracked or broken?

YES

Replace pilot burner assembly.

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