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What This Guide Helps With
Troubleshoots incomplete thermal-rinse conditions caused by cycle selection, utilities, loading, water supply, configuration, or service-level heating problems.
Step-by-Step Troubleshooting
1. Protect Patients and Processing Workflow
Do not consider a load successfully disinfected when the required thermal-rinse process was not completed.
Segregate the affected load and follow the facility's reprocessing policy. Transfer processing to another verified washer-disinfector when necessary.
Expected outcome: Instruments from an incomplete thermal-disinfection process are not released for clinical use.
2. Confirm the Exact Cycle Failure
Review the reported condition and available cycle information.
Determine whether:
- Target temperature was never reached
- Temperature was reached but not maintained
- The cycle stopped before thermal rinse completed
- The issue occurs on every cycle or one specific program
- A related water, drain, utility, or temperature indication was present
Do not invent acceptable temperature or hold-time requirements; use the programmed process and approved facility/manufacturer documentation.
Expected outcome: The exact stage and nature of the thermal-rinse failure are identified.
3. Verify the Correct Cycle Was Selected
Confirm that the selected cycle is the intended validated cycle for the load being processed.
Check normal operator-accessible cycle selections and configuration displays without entering restricted service menus or changing validated process settings.
Expected outcome: The proper cycle is selected. If an incorrect cycle selection caused the concern, use the approved cycle and verify normal completion before stopping troubleshooting.
4. Check Basic Utility Availability
Inspect the washer-disinfector for obvious utility problems, including:
- Electrical power abnormalities
- Closed or disturbed accessible water supply valves
- Facility utility interruptions
- Abnormal drain conditions
- Nearby equipment showing similar utility problems
Coordinate with Facilities when building utilities are suspected.
Expected outcome: Required external utilities are available and stable.
5. Check Water Supply Conditions Externally
Look for indications that water supply may be inadequate or abnormal, such as:
- Other equipment experiencing water problems
- Recently completed plumbing work
- Supply interruptions
- Abnormally slow filling
- Visible hose or connection problems where accessible
Do not adjust facility water systems unless authorized.
Expected outcome: No obvious external water-supply condition is preventing normal cycle operation.
6. Verify Loading and Rack Position
Confirm the rack is fully seated and the load does not obstruct circulation.
Excessive, improperly positioned, or incompatible loading can affect process performance even when the heating system itself is operational.
Expected outcome: The rack is properly coupled and the chamber is loaded appropriately for the selected process.
7. Review Available Cycle Data
Use normal cycle records or operator-accessible process information to compare the failed cycle with a recent successful cycle when available.
Look for differences in:
- Fill progression
- Cycle timing
- Temperature progression
- Early termination
- Utility-related messages
Do not change temperature calibration, validated cycle parameters, or service-level configuration during this step.
Expected outcome: Available information confirms whether the problem is repeatable and provides evidence for escalation without altering validated settings.
8. Perform a Controlled Verification Cycle
If external causes have been corrected and operation can be safely tested, perform an appropriate facility-approved test cycle.
Do not use patient-care instruments as the test load unless permitted by facility procedure.
Confirm that the programmed process reaches and completes its required thermal phase according to approved documentation.
Expected outcome: The thermal phase completes normally. If it does, troubleshooting can stop after required return-to-service verification.
9. Stop if Temperature Performance Remains Unacceptable
If the thermal rinse continues to fail despite proper cycle selection, utilities, rack placement, and loading, remove the washer-disinfector from service.
Possible service-level categories include the heating system, temperature sensing, water circulation, utility regulation, controls, or validated process configuration.
Do not adjust calibration or validated cycle parameters simply to make a cycle pass.
Expected outcome: A washer-disinfector unable to demonstrate its required thermal process is not used for clinical reprocessing.
If the Problem Persists
Common external causes involving cycle selection, utilities, water availability, rack positioning, and loading have been ruled out.
The device should be:
- Removed from service
- Labeled Out of Service
- Sent for repair or qualified service evaluation
- Evaluated using appropriate Belimed documentation and approved temperature/process test equipment
- Repaired, calibrated, or configured only by qualified personnel
Any temperature calibration or validated cycle configuration work must follow approved procedures. Complete appropriate process and functional verification before returning the washer-disinfector to service.
Knowing when to stop external troubleshooting rather than altering a validated process is proper troubleshooting.
Clinical Use Tip
A completed cycle is not automatically an acceptable cycle; confirm the required thermal-disinfection phase was actually achieved before releasing the load.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Sterile Processing reported that the washer completed earlier stages but repeatedly failed to complete the programmed thermal-rinse phase."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found the facility water supply to the unit had been disturbed and was not providing normal flow following nearby plumbing work."
Resolution
What action was taken.
Example:
"Facilities restored the water supply, and Clinical Engineering completed a verification cycle that reached and completed the programmed thermal-rinse phase normally."
Helpful Details to Include (If Known)
- Cycle/program selected
- Exact process message or alarm
- Whether temperature was reached
- Whether hold time completed
- Cycle stage where failure occurred
- Recent successful cycle comparison
- Water and utility conditions
- Rack and load configuration
- Any recent plumbing or facility work
- Verification cycle result
- Final device status
Final Thought
Treat an incomplete thermal process as a processing failure until proven otherwise. Verify cycle selection, utilities, loading, and available process data before suspecting internal heating or sensing problems, then escalate without altering validated parameters.
That is successful troubleshooting.