The following pages include troubleshoo!ng flowcharts in reference for the Single Stage
A801X family of furnaces only.
The informa!on contained is for reference only and does not cover all scenarios or problems
that may be encountered.
ONLY qualified technicians should a$empt to install, troubleshoot, or repair this appliance.
Failure to follow all cau!ons and /or warnings could result in personal or property damage,
including death.
Troubleshoo!ng Flowchart Index
IFC Component Layout
Ge%ng Started
Error Codes
E2.1 – Retries Exceeded (flame never sensed)
E2.2 – Recycles Exceeded (loss of flame a&er being sensed)
E3.1 – Shorted Pressure Switch
E3.2 – Open Pressure Switch
E04 – Open Thermal Limit
E04 – Flame Rollout
E05 – Flame Detected , should not be present
E6.1 – Reversed Polarity (High Voltage)
E6.2 – Faulty Ground
E6.3 – Igniter Circuit
E7.1 – Gas Valve (MVL) energized when it should not be
E08 – Flame Current Low, opera!on allowed
E11 – See troubleshoo!ng Instruc!ons
E12 – Open Fuse
E0 – Internal Failure
E2.3 – 1
s t
Stage Gas Valve energized when it should not be (10 !mes)
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