The following pages include troubleshoong flowcharts in reference for
the 1 Stage S8B1, S8X1 and 2 Stage S8X2 families of furnaces only.
The informaon contained is for reference only and does not cover all
scenarios or problems that may be encountered.
ONLY qualified technicians should aempt to install, troubleshoot, or
repair this appliance.
Failure to follow all cauons and /or warnings could result in personal or
property damage, including death.
Troubleshoong Flowchart Index
IFC Component Layout
Error Codes
E01 – Internal failure
E2.1 – Retries Exceeded (flame never sensed)
E2.2 – Recycles Exceeded (loss of flame a!er being sensed)
E2.3 – 1
st
Stage Gas Valve energized when it should not be (10 mes)
E3.1 – Shorted Pressure Switch, 1
st
Stage
E3.2 – Open Pressure Switch, 1
st
Stage
E3.3 – Shorted Pressure Switch, 2
nd
Stage
E3.4 – Open Pressure Switch, 2
nd
Stage
E04 – Open Thermal Limit
E05 – Flame Detected , should not be present
E6.1 – Reversed Polarity (High Voltage)
E6.2 – Faulty Ground
E6.3 – Igniter Circuit
E07 – 1
st
Stage Gas Valve (MVL) energized when it should not be
E08 – Flame Current Low, operaon allowed
E11 – See troubleshoong Instrucons
E12 – Open fuse
Status Codes
Menu Opons
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