Status codeE05Trane
What it means
Flame detected when it should not be present.
Call a profurnace
How it shows: 7-segment display alternates with mode: E05
§1Likely causes
- Flame sense wire shorted to ground
- Flame sensor grounded
- Moisture or debris in gas valve inlet screen / faulty gas valve
§2Safe DIY steps
- Technicianturn off gas and power, inspect gas valve inlet screen and drip leg, replace gas valve if needed
- Techniciancheck flame sense wiring for shorts
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: immediately; this is a gas safety fault.
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.
E06TraneVoltage reversed polarity or bad grounding.
E08TraneLow flame current, but still strong enough to allow operation.
E09TraneOpen inducer limit switch or condensate pressure switch.
E12TraneOpen fuse: the onboard 5 amp fuse is open or missing.