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Scott SmithAug 9, 2025
What to do if OAD Proving Switch fails in Trane RRU150F N Fan?
- PPatrick PattersonAug 9, 2025
If the OAD proving switch fails, start by checking for voltage at the actuator and at the UC. Also, verify the OAD power transformer at the UC. Then, check for continuity through the end switch at the UC. If the unit has an optional RA damper installed, the switch on the OAD is always proven.