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What This Guide Helps With
This guide addresses the Alarm: Jacket Temperature Probe Failure – RTD probe JT output outside normal range condition, which causes the sterilizer to abort the cycle due to invalid jacket temperature readings. This prevents proper heating and compromises sterilization control and safety.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the sterilizer from service immediately if this alarm occurs
- Do not use any instruments from an aborted cycle
Verify the Reported Alarm and Behavior
- Confirm the display shows: Jacket Temperature Probe Failure (Alarm 213)
- Observe if the cycle automatically aborts
- Check if jacket temperature reads 0.0°F or an abnormal value
- Determine if the alarm occurs at startup or during heat-up
Inspect Accessible Probe Wiring Connections
- Check visible wiring connections associated with the jacket temperature probe
- Look for loose, damaged, or disconnected wiring
Check for Signs of Moisture or Damage
- Inspect accessible areas for moisture intrusion or corrosion
- Look for physical damage near probe connection points
Perform a Power Reset
- Power OFF the sterilizer
- Wait 30–60 seconds
- Power ON and re-evaluate
Isolate the Source of the Problem
- If wiring issues are found, suspect accessory or wiring-related causes
- If alarm persists with good wiring, suspect probe failure (RTD JT)
- If probe and wiring appear intact, consider calibration drift or control issue
- Look for fixed, erratic, or out-of-range temperature readings
- Check if alarm returns immediately after reset
If the Problem Persists
If all external checks are complete and the alarm remains, internal causes are likely.
- Remove the device from service
- Label the unit Out of Service
- Send for repair or qualified bench evaluation
Clinical Use Tip
Never troubleshoot temperature-related alarms on an active patient load. Always move instruments to a backup sterilization method before removing the unit from service.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Unit displayed Alarm 213 – Jacket Temperature Probe Failure. Cycle aborted with jacket temperature reading 0.0°F."
Cause
What was observed during troubleshooting.
Example:
"RTD probe signal out of range. External wiring verified intact, indicating likely failed probe or calibration/control issue."
Resolution
What action was taken.
Example:
"Unit removed from service. Power cycled with no change. Tagged out and sent for repair and probe evaluation/calibration."
Helpful Details to Include (If Known)
- Alarm behavior
- Accessories swapped
- Power behavior
- Environmental factors
- Indicator lights
- Final device status
Final Thought
Temperature probe alarms directly impact sterilization accuracy and patient safety. Always rule out simple wiring issues first, but recognize that persistent probe alarms typically indicate sensor or control failure requiring escalation. Proper documentation supports safe and efficient repair.
That is successful troubleshooting.