Status codeE09Trane
What it means
Open inducer limit switch or condensate pressure switch.
Call a profurnace
How it shows: 7-segment display alternates with mode: E09
§1Likely causes
- Condensate system not draining freely
- Improper venting installation or vent terminations obstructed
- Incorrect inducer limit switch installed
- Inducer or heat exchanger malfunction
§2Safe DIY steps
- Check that the condensate drain system is free flowing
- Check that outdoor vent terminations are clear
- Techniciancorrect the condensate drain or venting; check inducer limit
Safety firstIf you smell gas, do not touch any electrical switch or use a phone in the building; leave immediately and call your gas supplier from outside. Turn off electrical power at the furnace switch or breaker before opening any panel, and never bypass or jumper a limit, rollout or pressure switch. Gas valve, burner, venting, wiring and control-board work should be done by a licensed HVAC technician.
§3When to call a pro
Call a licensed HVAC technician: if the drain and vents are clear and the code persists.
Find a local HVAC pro →§4Other Trane codes
E01Trane
Loss of the IRQ or other internal failures (internal furnace control error).
E04TraneOpen limit: main thermal limit, flame rollout switch, or reverse airflow switch.
E05TraneFlame detected when it should not be present.
E06TraneVoltage reversed polarity or bad grounding.
E08TraneLow flame current, but still strong enough to allow operation.
E12TraneOpen fuse: the onboard 5 amp fuse is open or missing.