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Trane S8V2B060M4PCB 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.

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Error-code table

Search codes for S8V2B060M4PCB

Code Meaning System area Safe first step Action
E01 Internal control failure Integrated furnace control Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
E2.1 Retries exceeded; flame never sensed Ignition and flame sensing Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
E2.2 Recycles exceeded; established flame was lost 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
E4.0 Open high limit switch 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 switch Thermal limit and safety circuit Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
E4.2 Open rollout limit switch Thermal limit and safety circuit Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
E05 Flame detected when it should not 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 open or igniter relay 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 not be Redundant relay / HLO output Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
E08 Low flame sense Flame sensing 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 file error Configuration data Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
E17 Blower communication error Blower communication Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
E23 Menu parameters not received Control communication Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
E24 Internal ACM/CCM communication error Control communication Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
E25 Orientation sensor 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 bounds Return static pressure transducer Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
E27 Return air thermistor out of bounds Return air thermistor Record the flash pattern, avoid repeated reset attempts, and schedule GreenFlow service. View details
E28 Supply air thermistor out of bounds Supply air 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.

Safe visible checks

  • Thermostat display and settings
  • Filter condition and return-air path
  • Visible outdoor-unit obstruction
  • Photos of the code, unit, and nameplate

Stop and call

  • Repeated lockouts or recurring faults
  • Pressure-switch or sensor faults
  • Electrical odor, unusual noise, or ice buildup
  • Any sealed cabinet, refrigerant, gas, or warranty issue

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Our Happy Customers

Randy J.

Thanks to Andrey for an amazingly quick response to my request for a service call. He diagnosed and fixed my issue within 24 hours of my asking for help. Excellent service. Thanks.

Ray

Just had a service call because my tankless water heater stopped working with E110 code. Andrey located the root cause real quick and fixed the issue within half an hour, also gave reasonable recommendations for further maintenance.

John F.

I needed 2 new AC units and decided to go with high efficiency heat pumps. I chose Greenflow because of the equipment they offered, and the price (2nd lowest quote and much cheaper than the average of all quote we received). Their technicians were very detail oriented and...

Murali S.

HVAC technician was punctual, followed up well, completed quick repairs, ensured the issue was resolved, and provided helpful recommendations.

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