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Ignition Control 107163-01
RED LED Flash Code
Diagnostic Codes / Status of Furnace
Off
No Power to Control or Board Fault Detected
On
Board Fault Detected
Fast Heartbeat
3
Call for Heat / Burner Operation
Slow Heartbeat
1
Normal Operation – Idle, Continuous Fan, or Cool
1 Flash
2
Reverse Line Voltage Polarity or Phasing of 120V power
2 Flashes
2
Improper earth ground
3 Flashes
2
Burner failed to light, or lost flame during heat demand
4 Flashes
2
Low flame signal – check flame sensor
5 Flashes
2
Watchguard – burner failed to light, exceeded maximum number of retries/
recycles, 1 hour lockout
6 Flashes
2
Not used
7 Flashes
2
Primary or Secondary limit switch open or Watchguard mode – Limit Switch
open longer than 3 minutes
8 Flashes
2
Roll-out Switch Open
9 Flashes
2
Pressure Switch failed to close or opened during heat demand, inducer on
10 Flashes
2
Watchguard - Pressure switch opened 5 times during a single heating demand
11 Flashes
2
Pressure switch stuck closed prior to activation of Combustion Air Inducer
12 Flashes
2
Flame sensed without gas valve energized
13 Flashes
2
Low line voltage
Notes
Note - 1
A slow heartbeat is indicated by 1s on / 1s off. It is used for idle, continuous fan
and cool modes.
Note - 2
Error codes are indicated by a “rapid flash” - the LED flashes X times at ½
second on ½ second off, remains off for 3 seconds then repeats.
Note - 3
A fast heartbeat is indicated by 0.5s on / 0.5s off. It is only used during a heat
call.
Note - 4
Last 10 error codes are stored in memory including when power is shut off to
the unit. - To recall, press, and release button, most recent will be displayed first,
LED off for 3 sec, then next error code is displayed, etc. To clear error codes,
depress and hold button longer than 5 seconds.
