Product troubleshooting

Trane S9V2C100U5PSC troubleshooting and error codes

Use this table to identify what the visible code may mean and what information to share when scheduling service. Keep checks simple and visible; do not open electrical, refrigerant, gas, or sealed equipment compartments.

Schedule Service +1 (857) 767-6414

Error-code table

Search codes for S9V2C100U5PSC

Search error codes

Code	Meaning	System area	Safe first step	Action
E1.0	Internal failure	Integrated furnace control	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E2.1	Retry exceeded	Ignition and flame sensing	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E2.2	Recycles exceeded	Ignition and flame sensing	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E2.3	First-stage gas valve not energized when expected	Gas valve control	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E3.1	Shorted first-stage pressure switch	Pressure switch circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E3.2	Open first-stage pressure switch	Pressure switch circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E3.3	Shorted second-stage pressure switch	Pressure switch circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E3.4	Open second-stage pressure switch	Pressure switch circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E3.5	Open second-stage pressure switch with second-stage gas valve energized	Pressure switch circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E4.0	Open high limit	Thermal limit and safety circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E4.1	Open reverse-airflow limit	Thermal limit and safety circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E4.2	Open rollout limit	Thermal limit and safety circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E5.0	Flame sensed when no flame should be present	Flame sensing	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E6.1	Reversed voltage polarity	Power and grounding	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E6.2	Bad grounding	Power and grounding	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E6.3	Igniter failure	Ignition circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E7.1	First-stage gas valve energized without request	Gas valve control	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E7.2	Redundant relay energized when it should be off	Redundant relay / HLO output	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E8.0	Low flame sense	Flame sensing	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E9.1	Open inducer limit switch	Inducer safety circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E9.2	Open condensate pressure switch	Condensate safety circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E9.3	Condensate lockout	Condensate safety circuit	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E9.4	Furnace control mismatch	Control compatibility	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E10.1	VSIM motor-control communication error	Motor communication	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E10.4	VSDI control or motor failure	Variable-speed inducer control	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E11	Internal gas valve error	Gas valve control	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E12	Open low-voltage fuse	Low-voltage protection	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E13	Blower HP or OEM ID mismatch	Blower identification	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E14	Configuration data error	Configuration data	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
No model	No model number programmed	Configuration data	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
Invalid model	Invalid model number	Configuration data	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E17	Blower motor communication error	Blower communication	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E18	Blower control communication error	Blower communication	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E23	Incomplete menu data	Control communication	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E24.1	ACM/CCM Modbus communication lost	Control communication	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E24.2	CAN communication lost	Control communication	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E25	Accelerometer out of bounds	Orientation sensor	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E26	Return static pressure transducer out of range	Return static pressure transducer	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E27	Return thermistor out of range	Return thermistor	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details
E28	Supply thermistor out of range	Supply thermistor	Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service.	View details

Safety note

What is safe to check before service

These pages are meant to help document the issue, not replace diagnosis. GreenFlow should handle pressure-switch, electrical, refrigerant, lockout, recurring, and warranty-related conditions.