Furnace blower starts but there is no warm air, burners never ignite
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety: Rollout conditions can indicate a dangerous flame rollout or blocked heat exchanger. Do not bypass safety switches.
Steps to check:
- Filter and vents: Replace dirty filters and ensure vents are clear.
- Check rollout switches: Locate manual reset rollout switches near the burners on the Trane furnace. If tripped, they may have a small reset button. Press gently to reset once.
- Observe operation: After reset, watch for normal ignition. If rollout trips again, shut down the furnace and call a professional.
When to call a professional: Repeated rollout trips require immediate professional diagnosis of venting, heat exchanger, and burner operation.
Repair Difficulty
Required Part
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