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What This Guide Helps With
This guide helps troubleshoot the “Over Sterilize Temperature” alarm, which occurs when chamber temperature exceeds allowable limits. This condition can lead to improper sterilization control and potential damage to instruments or loads.
Step-by-Step Troubleshooting
1. Ensure Patient Safety First
- Do not use items from the affected cycle until sterilization is confirmed valid
- If cycle is active, allow it to complete or abort per facility policy
2. Verify the Reported Alarm and Behavior
- Confirm the alarm message is displayed exactly
- Observe when the alarm occurs (typically during sterilize phase)
- Check if the cycle continues automatically (expected behavior)
3. Check Steam Supply Pressure
- Verify facility steam pressure to the unit
- Ensure pressure is not excessively high (greater than normal operating range)
4. Inspect Steam Supply Piping
- Check for recent facility adjustments or valve changes
- Ensure no bypass or regulator issues allowing excessive pressure
5. Check Chamber Steam Trap Function
- Observe for improper condensate removal
- Listen for abnormal steam trap behavior if accessible
6. Evaluate Solenoid Valve Operation
- Listen for normal actuation sounds during cycle phases
- Observe for signs of sticking or continuous flow
7. Consider Control Calibration Drift
- If no external issues are found, suspect calibration drift
- Look for consistent temperature overshoot across cycles
If the Problem Persists
If external causes have been ruled out and the alarm continues:
- Remove the sterilizer from service
- Label the unit as Out of Service
- Send for qualified repair or calibration
Clinical Use Tip
Never troubleshoot a sterilizer during active patient use. Always ensure instruments are processed on a verified working unit before clinical use.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Sterilizer alarmed ‘Over Sterilize Temperature’ during sterilize phase; cycle continued but exceeded setpoint."
Cause
What was observed during troubleshooting.
Example:
"Steam supply pressure elevated above normal range / no external cause identified indicating possible internal fault."
Resolution
What action was taken.
Example:
"Verified steam supply and piping; unit removed from service and escalated for repair and calibration."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Over-temperature alarms indicate a loss of controlled sterilization conditions. Always rule out external causes first, but escalate promptly if proper temperature control cannot be maintained.
That is successful troubleshooting.