I have a Trane XE78 and I currently have a blinking light. The light seems to be blinking at 2 flases. I have some info that says the that means there is an External Lockout (retries or recycles exceeded). I have no idea what that means, and is there som...

https://www.askmehelpdesk.com/heating-air-conditioning/trane-xe78-wr-50a50-405-temperature-cutout-434348.html
See if this helps any. Good luck