Trane S8V2A040M3PC Installation, Operation And Maintenance Manual page 70

T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g
DEFINITION:
Igniter Relay Fault – The control board has sensed
that the igniter relay has stuck closed
igniter Fault – The control board has sensed that
the igniter circuit is open or shorted.
Replace IFC, igniter relay has failed
70
Igniter is good
Replace igniter.
Check opera on
6.3 Fault Code
Make a call for
st
1 stage hea ng
Does igniter
YES
glow?
NO
Is 120 VAC
measured between
IGN-H and IGN-N?
YES
Verify igniter harness is
not damaged and
connectors are ght
Disconnect electrical
power to the furnace
Disconnect igniter
and check resistance
Is resistance
reading between 37
NO
– 70 ohms?
(at ~75F)
YES
Igniter is good
Replace IFC, igniter
NO
relay has failed
S8V2-SVX001-1A-EN