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S9XB-SVX001-1D-EN
Troubleshooting
The following pages include troubleshooting
flowcharts in reference to the S9X1 and S9B1 single
stage furnaces and the S9X2 two stage furnace only
The information contained is for reference only and
does not cover all scenarios or problems that may be
encountered.
ONLY qualified technicians should attempt to install,
troubleshoot, or repair this appliance.
Failure to follow all cautions and/or warnings could
result in personal or property damage, including death.
Error Codes
Alarm Error Code
Alarm Explanation
e0!
Loss of the IRQ or other internal failures (Internal IFC error)
e2.!
Retry Exceeded (Flame never sensed, one hour lockout after 3 times)
e2.2
Recycles Exceeded (Flame sensed then lost, one hour lockout after 10 times)
e2.3
1st Stage Gas Valve Not Energized When It Should Be exceeded after 10 times
e3.!
Shorted Pressure Switch, 1st Stage
e3.2
Open Pressure Switch, 1st Stage
e3.3
Shorted Pressure Switch, 2nd Stage (Not applicable for S9X1/S9B1)
e3.4
Open Pressure Switch, 2nd Stage (Not applicable for S9X1/S9B1)
e04
Open Limit (Main Thermal, Rollout Switch, or Reverse Airflow Switch)
e0s
Flame detected, should not be present
e6.!
Voltage reversed polarity
e6.2
Bad grounding
e6.3
(1) Igniter relay fails
(2) Igniter open
e7.!
1st stage gas valve (MVL) is energized when it should be off
e08
Flame current is low, but still strong enough to allow operation
e09
Open Inducer Limit Switch or Condensate Pressure Switch
e11
(1) 1st stage gas valve not energized when it should be
(2) 1st stage gas valve relay stuck closed
(3) 2nd stage gas valve relay stuck closed (Not applicable for S9X1/S9B1)
(4) 2nd stage gas valve energized when it should not be (Not applicable for S9X1/S9B1)
(5) 2nd stage gas valve not energized when it should be (Not applicable for S9X1/S9B1)
e12
Open fuse
e14 / e18
Refer troubleshooting flow chart
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