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CHECKING HONEYWELL S8600H OR S-8610M
INTERMITTENT IGNITION CONTROLS
NO SPARK AT PILOT BURNER BUT PILOT WILL NOT LIGHT
Turn off gas supply.
Is there a good connection between terminals?
Is module securely attached to appliance for good ground
connection?
Is voltage (24VAC) across transformer positive terminal and
GND with "call for heat"?
Is voltage (24VAC) across ignition module terminals 24 Volt and
GND on "call for heater"?
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 down below
"call for heat". Wait one minute then turn system on.
Turn on gas supply and/or
power supply.
Turn off power supply.
Is high voltage cable assembly rmly plugged into module?
Is pilot ground wire rmly attached to the pilot assembly and
GND terminal on module?
Are high voltage cable and ground wire in good condition (not
brittle, burnt or cracked)?
Make sure pilot ame spreader (hood) is the closest metal to
the electrode to prevent the spark from shorting out to other metal
parts (pilot screen, pilot shield, etc).
High voltage cable must not touch metal surfaces or current
carrying wires.
Is there a 7/64" spark gap between the tip (edge) of the hood and
electrode, and is the gap located in the pilot gas stream?
Is the ceramic insulator surrounding the electrode in good
condition (not cracked or broken)?
Replace pilot burner assembly.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Check the circuit providing
24 VAC.
Replace ignition module.
Securely connect cable
and/or ground wire.
Replace pilot burner
and/or ground wire.
Carefully bend down-
wards top of ground
strap to achieve
1/8” spark gap.
Replace ignition module.
NO
Fix connection and/or
tighten module to the
appliance.
YES
NO