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What This Guide Helps With
This guide addresses the Chamber Pressure/Temperature Failure alarm, which occurs when chamber pressure or temperature readings fall outside the normal steam range. This condition causes an automatic cycle abort and prevents proper sterilization.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the sterilizer from use if the alarm occurs
- Do not use instruments from an aborted cycle
- Reprocess any affected loads
Verify the Reported Alarm and Behavior
- Confirm the display shows Chamber Pressure/Temperature Failure
- Observe if the alarm occurs during sterilize phase
- Check for abnormal readings (e.g., 0 psig / 0°F)
- Confirm the cycle aborts automatically
Check Steam Supply (Most Common External Cause)
- Verify steam supply valve is open
- Confirm facility steam pressure is stable and adequate
- Check for recent facility steam interruptions
Observe Chamber Pressure and Temperature Response
- Run a test cycle if safe (empty chamber)
- Monitor pressure and temperature rise
- Look for flatlined, erratic, or mismatched readings
Inspect Door Seal and Chamber Integrity
- Ensure door is fully closed and latched
- Inspect gasket for wear or damage
- Check for visible steam leaks
Check for Obvious Sensor or Connection Issues (External Only)
- Inspect accessible wiring for pressure transducer and temperature probe
- Check for loose or damaged connectors
Evaluate for Calibration or Control Drift
- Assess if readings are inconsistent or drifting
- Consider calibration issues if values are slightly inaccurate
Identify Likely Internal Failures (After External Checks)
- Possible pressure transducer malfunction
- Possible RTD temperature probe failure
- Control out of calibration
- Main control board failure
- Check control board LEDs if externally visible
If the Problem Persists
If steam supply is confirmed and no external issues are found, the failure is likely internal. Remove the device from service, label it Out of Service, and send for qualified repair and calibration.
Clinical Use Tip
Never troubleshoot on an active patient load. Always move instruments to a backup sterilizer before continuing processing.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Sterilizer alarmed with Chamber Pressure/Temperature Failure during sterilize phase and aborted cycle."
Cause
What was observed during troubleshooting.
Example:
"Chamber readings were abnormal with no external steam issues. Condition consistent with failed sensor or calibration drift."
Resolution
What action was taken.
Example:
"Removed unit from service and sent for repair, calibration, and control board evaluation."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Pressure and temperature must align precisely for proper sterilization. When readings fall outside acceptable range, trust the alarm and escalate appropriately.
That is successful troubleshooting.