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Ignition Control LED Codes
The ignition control LED flashes codes which indicate
normal or abnormal operations:
Table 4. Fault Codes
LED Status
Flashing Rate
Fault Description
Slow Flash
One flash per
second
Normal operation:
No call for heat
Fast Flash
Two flashes per
second
Normal operation:
Call for heat
2 Flash
Two flashes in
second with
1-second pause
System lockout:
Failed to detect or
sustain flame
3 Flash
Three flashes in
1.5 seconds with
1-second pause
Pressure switch senses
incorrect pressure or gas
valve coil is open.
4 Flash
Four flashes in
2 seconds with
1-second pause
High limit or rollout
switch open
5 Flash
Five flashes in
2.5 seconds with
1-second pause
Flame sensed and gas
valve not energized
Steady
--
Internal failure:
Micro-controller failure;
self-check
