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What This Guide Helps With
Displayed temperature does not match expected warming output or fluctuates, often due to setup, airflow, or accessory-related issues rather than internal failure.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the device from active patient use and transition to an alternate warming method.
- Expected: No patient connected during troubleshooting.
Verify Reported Issue
- Compare the displayed temperature with expected performance or an external thermometer if available.
- Why it matters: Confirms true sensor drift vs perception or workflow issue.
- If readings appear normal → issue resolved.
Power Cycle the Unit
- Turn the unit off, wait 10–15 seconds, then power back on.
- Why it matters: Clears temporary sensor or control faults.
- If readings stabilize → issue resolved.
Check Set Temperature and Mode
- Verify the setpoint is within normal clinical range (~37–41°C) and correct operating mode is selected.
- Why it matters: Incorrect settings can mimic drift or instability.
- If corrected and stable → issue resolved.
Inspect Hose and Blanket / Pad Connection
- Ensure hose connections are secure and the blanket/pad is properly attached.
- Expected: Tight connections with no leaks or disconnections.
- If loose → reconnect and retest.
Verify Proper Airflow
- Check that the hose is not kinked, blocked, or compressed and that blanket airflow pathways are unobstructed.
- Why it matters: Restricted airflow can cause uneven heating and inaccurate sensed temperature.
- If corrected → retest for stability.
Inspect Air Intake and Filter Area
- Check for dust buildup or blockage at the air intake/filter.
- Why it matters: Reduced airflow can affect heater performance and temperature sensing accuracy.
- Clean if needed and retest.
Confirm Correct Blanket / Pad Type
- Verify that the accessory is compatible with the T/Pump system.
- Why it matters: Incorrect accessories can alter heat transfer and sensor feedback.
- If incorrect → replace and retest.
Check for Environmental Factors
- Ensure the unit is not exposed to drafts, vents, or unusually cold environments.
- Why it matters: External conditions can affect perceived or actual temperature stability.
- Adjust environment if needed.
Observe for Consistency
- Run the unit and monitor whether temperature stabilizes over time.
- Expected: Gradual and stable approach to setpoint.
- If unstable or drifting continues → proceed to escalation.
If the Problem Persists
If all external causes have been ruled out, the issue is likely related to an internal temperature sensor or control system.
Remove the device from service, label it Out of Service, and send for repair or bench evaluation.
Knowing when to stop is proper troubleshooting.
Clinical Use Tip
Do not troubleshoot while the device is in use on a patient. Always transfer the patient to another warming method before evaluation.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Unit reported inaccurate temperature readings and inconsistent warming."
Cause
What was observed during troubleshooting.
Example:
"Airflow restriction from kinked hose causing unstable temperature sensing."
Resolution
What action was taken.
Example:
"Corrected hose routing, verified stable temperature operation."
Helpful Details to Include (If Known)
- Outlet tested
- Hose condition (kinks, blockage)
- Blanket type used
- Air intake/filter condition
- Temperature stability over time
- Alarm behavior (if any)
- Environmental conditions
- Final device status
Final Thought
Temperature accuracy is critical for safe patient warming. Always rule out airflow, setup, and environmental causes first before suspecting internal failure. Proper escalation and clear documentation ensure patient safety and efficient repair.
That is successful troubleshooting.