Status LED flashes seven times repeatedly, furnace will not start heating cycle
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: Turn off power and gas. Do not attempt to disassemble the gas valve body. Gas valve work should be done by a qualified technician.
Steps to check:
- Inspect wiring: Remove the burner access panel. Locate the Trane gas valve on the gas manifold. Check the wiring harness for loose connectors, corrosion, or damaged wires. Reseat connectors firmly.
- Visual inspection: Look for signs of overheating, burning, or physical damage on the gas valve body and coil.
- Reset power: Restore power and call for heat. Listen for the gas valve click when the ignitor glows. If no click and the code returns, the valve or control board may be faulty.
When to call a professional: Gas valve electrical testing and replacement require specialized tools and leak checks. Contact a Trane-certified technician to test the gas valve coil resistance and replace the valve or control board as needed.