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Manufacturer
Model
What This Guide Helps With
No warming, flow errors, or unit running without heat due to hose disconnection, pad issues, or restricted water circulation.
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
- Confirm symptoms such as no warming, low temperature, or unit running without effective heat transfer.
- Expected: Unit powered on but not circulating or heating effectively.
Inspect Hose Connections
- Ensure both supply and return hoses are fully seated and locked into the unit and pad.
- Expected: Firm connection with audible/physical click.
- If loose or disconnected → reconnect and retest.
Check for Kinked or Obstructed Tubing
- Trace the full length of the hose and pad tubing.
- Why it matters: Kinks or compression will prevent water circulation.
- If kink found → straighten tubing and retest.
Inspect the Pad / Blanket
- Check for folds, compression under the patient, or visible damage.
- Expected: Pad lies flat with no restriction to internal channels.
- If damaged or overly compressed → replace pad and retest.
Verify Water Level in Reservoir
- Check that the unit has adequate water per manufacturer fill line.
- Why it matters: Low water levels prevent proper circulation.
- If low → refill appropriately and retest.
Check for Air in the System
- Listen for gurgling or inconsistent flow sounds.
- Why it matters: Air pockets can block circulation.
- Cycle the unit and gently reposition hoses to help purge air.
- If circulation improves → issue resolved.
Power Cycle the Unit
- Turn the unit off, wait 10–15 seconds, then power back on.
- Why it matters: Resets flow detection and control logic.
- If normal operation resumes → issue resolved.
Test with a Known-Good Pad and Hose Set
- Swap with a known-good pad and hose assembly.
- Expected: Unit should circulate and heat normally.
- If resolved → original pad/hose set is defective.
If the Problem Persists
If circulation issues continue after verifying connections, tubing, water level, and accessories, the problem is likely internal (pump, flow 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
Never troubleshoot while connected to a patient. Always move the patient to another warming device before evaluating circulation or heating issues.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Unit running but not warming patient; staff reports no heat output."
Cause
What was observed during troubleshooting.
Example:
"Kinked hose preventing water circulation between unit and pad."
Resolution
What action was taken.
Example:
"Straightened tubing, verified flow restored, and confirmed normal heating operation."
Helpful Details to Include (If Known)
- Hose connections verified and reseated
- Tubing checked for kinks or compression
- Pad condition inspected (damage or folding)
- Water level checked and corrected if needed
- Air removed from system (if present)
- Known-good pad tested
- Final device status (returned to service or sent for repair)
Final Thought
Most circulation-related issues come from simple external causes like connections, tubing, or accessories. Focus on flow first, protect the patient, and escalate appropriately when internal faults are suspected.
That is successful troubleshooting.