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Asset Type
Manufacturer
Model
What This Guide Helps With
Low or inconsistent warming output where the unit runs but fails to reach or maintain the selected temperature.
Step-by-Step Troubleshooting
Ensure Patient Safety First
- Remove the device from active patient use and switch to an alternate warming method.
- Expected: No patient connected during troubleshooting.
Verify Power and Unit Operation
- Confirm the unit powers on, display is active, and no major fault alarms are present.
- Expected: Unit enters normal operating mode.
- If not → address power issue before proceeding.
Check Set Temperature
- Verify the temperature setting is appropriate for clinical use.
- Why it matters: Incorrect or low setpoints can appear as heating failure.
- If adjusted and temperature rises → issue resolved.
Inspect Blanket / Pad Connection
- Ensure the hose or pad is securely connected to the unit.
- Expected: Firm connection with no looseness.
- If loose or disconnected → reconnect and retest.
Verify Correct Blanket Type
- Confirm the blanket/pad is compatible with the T/Pump system.
- Why it matters: Incorrect accessories can limit heat transfer.
- If incorrect → replace with proper blanket and retest.
Check for Kinks or Obstructions in Hose
- Inspect tubing for kinks, compression, or blockage.
- Why it matters: Restricted airflow reduces heat delivery.
- If corrected and heat improves → issue resolved.
Assess Airflow Output
- Feel for warm airflow at the hose outlet or blanket.
- Expected: Noticeable airflow and gradual warming.
- If weak or no airflow → possible fan or airflow restriction.
Inspect Air Filter (if accessible externally)
- Check for clogged or dirty intake filters.
- Why it matters: Restricted intake reduces heater efficiency.
- Clean or replace filter if needed and retest.
Check Ambient Conditions
- Ensure the unit is not in a very cold environment or exposed to drafts.
- Why it matters: Environmental factors can affect heating performance.
- If corrected → monitor for improvement.
Power Cycle the Unit
- Turn off, wait 10–15 seconds, then restart.
- Why it matters: Clears minor control or sensor issues.
- If normal heating resumes → issue resolved.
If the Problem Persists
If all external causes have been ruled out, the issue is likely internal (heater element, airflow system, or temperature sensing/control).
Remove the device from service, label it Out of Service, and send for repair or bench evaluation.
Knowing when to stop prevents unnecessary risk and wasted time.
Clinical Use Tip
Never troubleshoot a warming device while in use on a patient. Always transition the patient to another warming method first to maintain safe temperature management.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Unit not reaching set temperature during patient warming."
Cause
What was observed during troubleshooting.
Example:
"Obstructed airflow due to kinked hose limiting heat delivery."
Resolution
What action was taken.
Example:
"Straightened hose, verified airflow and proper heating, returned unit to service."
Helpful Details to Include (If Known)
- Outlet tested and confirmed working
- Hose/blanket swapped
- Airflow strength observed
- Filter condition checked
- Alarm indicators noted
- Final device status (in service vs out of service)
Final Thought
Effective troubleshooting starts with simple external checks and patient safety. Many heating issues are airflow or accessory-related. Escalate appropriately when internal failure is suspected, and always document clearly to support future service decisions.
That is successful troubleshooting.