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All installations and services must be performed by qualified service personnel.
46
Yes
Yes
Yes
Yes
Yes
After pre-purge,does the
hot surface ignitor energize
and glow?
Yes
After hot surface ignitor
warm-up, does gas valve
open?
Yes
No
No
No
No
Check the ignition control module
diagnostic LED lamp. Reset the
module by interrupting power to
system for more than one second.
If LED stays on continuously, replace
ignition control module.
No
Check wiring to draft inducer.
If okay, replace inducer assembly.
Is there 120 VAC across draft
inducer power terminals "IND"
& "IND N" at the ignition control
module?
Check wiring to hot surface
ignitor. If okay, replace hot
surface ignitor assembly.
Check wiring to gas valve.
If okay, Replace gas valve.
Check across "MV" terminals
on ignition control module for 24
VAC during the 4 second flame
proving period after ignitor
warm-up. Is there 24 VAC?
Is there voltage present at the
hot surface ignitor terminals
"IGN" & "IGN N" at the ignition
control module?