Trane / ML Series R-410A
Trane UPPER LAMP NOT LIT status display
In Trane's indoor-unit failure-mode recall table, a not-lit operation indicator is listed as Normal. It means the recall check is not showing an active stored indoor failure pattern.
- Urgency
- informational
- Verified
- Jul 31, 2026
- Fix path
- Not an error
What it means
In Trane's indoor-unit failure-mode recall table, a not-lit operation indicator is listed as Normal. It means the recall check is not showing an active stored indoor failure pattern.
Urgency
Not an error
This is a normal recall-display result, not a fault.
Likely causes
Homeowner fix
No repair is needed for this recall-display result. If the system is still not heating or cooling, use the normal symptom checks in the owner's materials and schedule service if comfort does not recover.
When to call a pro
Call for service if the unit will not run, trips power, leaks water, or later shows a blinking lamp pattern.
Repair vs replace
This display is normal and is not a repair-or-replace decision.
Your Trane model
ML Series R-410A model pages in the Trane catalog help compare this repair path with current replacement options.
For your technician
N/A (normal failure-mode recall display). Page context: Trane maps this display to the ML Series R-410A line; source: Trane MyLinkDrive NTXWMT-A111A(B) Service Manual, Section 9 Troubleshooting; display convention: match the letter U, letter P, letter P, letter E, letter R, letter L, letter A, letter M, letter P, letter N, letter O, letter T, letter L, letter I, and letter T marker exactly before comparing neighboring codes.
Which systems show it
ML Series R-410A
Related troubleshooting
Use the symptom guide alongside the exact display code if the unit is flashing, cycling, or showing comfort symptoms.
Related codes
Source
- Document
- Trane MyLinkDrive NTXWMT-A111A(B) Service Manual, Section 9 Troubleshooting