3 FlashesTrane
Trane 3 Flashes Error Code
Vent pressure switch error - blocked flue or inducer
Get instant help with Trane 3 Flashes
Stop searching through PDFs. Our AI assistant on WhatsApp is trained on official Trane documentation and can diagnose this fault code and guide you through the repair in minutes.
5-day free trial — no credit card required.
Other Trane Error Codes
2 Flashes
System lockout - retries exceeded
4 Flashes
Open high-temperature limit device - dirty filter, restricted airflow
5 Flashes
Flame sensed when gas valve should be off - leaking gas valve
6 Flashes
115VAC power reversed polarity or poor grounding
7 Flashes
Gas valve circuit error
8 Flashes
Low flame sensor signal - dirty/oxidized flame sensor
9 Flashes
Ignitor circuit fault - failed hot surface ignitor
1 Flash
Communication loss between RTRM and IGN module