Lennox MERIT ML180DFE

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IGNITION CONTROL 107163-01
Push Button
Error Recall
Diagnostic LED
Heating Blower Off
Delay Selector Switch
FANHEATCOOL24VCOM
PARKS
HUM24
Integrated Control 107163-01 Diagnostic Codes
RED LED
Flash Code
Diagnostic Codes / Status of Furnace
󰀨 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

Reverse Line Voltage Polarity or Phasing of 120V power
2 Flashes
2
Improper earth ground
3 Flashes
2

4 Flashes
2

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 󰀨
Note - 2
󰀨
󰀨
Note - 3 󰀨
Note - 4
󰀨
󰀨
is displayed, etc. To clear error codes, depress and hold button longer than 5 seconds.