Why is bearing oil temperature high on my Ingersoll Rand compressor?
Short answer: High bearing oil temperature trip. If your Ingersoll Rand Xe-series controller (Xe-145M, Sierra oil-free rotary) is showing High Bearing Oil T, the controller has logged a specific, documented condition. This page covers what it means, what causes it, what you can safely fix yourself, and when — and why — it takes a technician.
What exactly is the machine telling you?
Shutdown trip: the bearing oil temperature sensor read above 170°F while running (the controller also inhibits starting above 161°F). Indicates a cooling problem in the oil circuit.
Which machines show this?
Ingersoll Rand Sierra oil-free rotary screw compressors running the larger Xe-145M controller. Because these are two-stage oil-free machines with a separate bearing lubrication circuit, the fault set looks different from the flooded-screw R-series: plain-text warnings like Change Inlet Filter and Change Oil Filter, hard trips for bearing oil pressure and temperature, and sensor faults reported by tag name — 1AVPT Failure, 2ATT, 5OTT and so on — naming the exact transducer or probe involved. Practical tip: write down the sensor tag exactly as displayed before resetting; that tag maps to one specific instrument on the machine, and it is the difference between a five-minute service call and a guessing game.
What causes it?
- Oil cooler faces dirty or cooling air/water flow obstructed
- Oil level low or oil degraded
- Room ambient beyond spec
- Oil cooler, thermal valve, or sensor fault when it re-trips
Can you fix it yourself?
Often, yes — cooling-system cleanup, oil level and condition checks, and ambient control after a full cooldown handle most cases.
Step by step — what to try, in order:
- Let the unit cool completely before resetting
- Clean the oil cooler faces and confirm cooling airflow or water flow is unobstructed
- Check oil level and condition
- Verify room ambient temperature is within spec
When do you need a technician — and why?
If bearing oil still runs over 170°F after that, the oil cooler, thermal valve, and sensor need professional testing — bearings on an oil-free machine don't forgive guesses.
If it does come to a service call and you're in Nashville, TN or Birmingham, AL, we maintain independently compiled lists of local companies that service industrial air compressors — real businesses with verified contact information, none of whom paid to be listed.
Related questions
What does High Bearing Oil T mean on an Ingersoll Rand Xe-series controller (Xe-145M, Sierra oil-free rotary)?
High bearing oil temperature trip. Shutdown trip: the bearing oil temperature sensor read above 170°F while running (the controller also inhibits starting above 161°F). Indicates a cooling problem in the oil circuit.
Can I fix High Bearing Oil T on an Ingersoll Rand Xe-series controller (Xe-145M, Sierra oil-free rotary) myself?
Often, yes — cooling-system cleanup, oil level and condition checks, and ambient control after a full cooldown handle most cases.
When does High Bearing Oil T on an Ingersoll Rand Xe-series controller (Xe-145M, Sierra oil-free rotary) need a technician?
If bearing oil still runs over 170°F after that, the oil cooler, thermal valve, and sensor need professional testing — bearings on an oil-free machine don't forgive guesses. If oil temperature runs hot again after cooling-system cleanup, call a technician to check the oil cooler, thermal valve, and sensor.
Verified against service documentation: Ingersoll Rand Xe-series controller (Xe-145M, Sierra oil-free rotary) documentation for High Bearing Oil T (ifixcompressors.com)