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Asset Type
Manufacturer
Model
What This Guide Helps With
Low or inconsistent water temperature where the unit runs but does not reach the selected setpoint due to setup, flow, or external factors.
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 Unit Power and Operation
- Confirm the unit powers on, display is active, and no major alarms are present.
- Expected: Unit enters normal operating mode.
- If not → resolve power or alarm condition first.
Check Set Temperature
- Verify the temperature setpoint is within normal clinical range.
- Why it matters: Low or incorrect settings can appear as heating failure.
- If corrected and temperature rises → issue resolved.
Allow Adequate Warm-Up Time
- Observe the unit for several minutes after startup.
- Why it matters: Blanketrol systems may require time to heat circulating water.
- If temperature gradually increases → normal operation.
Inspect Blanket / Pad Connection
- Ensure hoses are fully connected and securely locked into the unit and blanket.
- Expected: No loose fittings or leaks.
- If loose → reconnect and retest.
Check for Kinked or Obstructed Tubing
- Trace the full length of the hoses and blanket tubing.
- Why it matters: Restricted flow prevents proper heat transfer.
- If kink or obstruction found → correct and retest.
Verify Adequate Water Level (if applicable)
- Check reservoir level and refill per manufacturer guidelines if low.
- Why it matters: Insufficient water reduces heating efficiency and circulation.
- If low → refill and retest.
Inspect for Air in the System
- Look for bubbling, inconsistent flow, or noise in tubing.
- Why it matters: Air pockets reduce effective heat transfer.
- If suspected → cycle the unit or prime per normal operation to remove air.
Check Blanket / Pad Condition
- Inspect for folds, compression, or internal blockage.
- Why it matters: Poor contact or flow restriction limits heat delivery.
- If damaged or compromised → replace blanket/pad and retest.
Verify Ambient Conditions
- Assess room temperature and environmental factors.
- Why it matters: Cold environments can slow heating performance.
- If environment is unusually cold → allow additional warm-up time.
If the Problem Persists
All common external causes have been ruled out. The issue is likely internal (heater element, circulation pump, or temperature sensing).
Remove the device from service, label Out of Service, and send for repair or bench evaluation.
Knowing when to stop prevents unnecessary risk and delays.
Clinical Use Tip
Never troubleshoot a warming system while connected to a patient. Always transition the patient to an alternate warming method first.
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:
"Kinked blanket tubing restricting water circulation."
Resolution
What action was taken.
Example:
"Corrected tubing positioning; verified normal temperature rise."
Helpful Details to Include (If Known)
- Outlet tested
- Water level verified
- Hose connections checked
- Tubing condition (kinks/obstructions)
- Alarm behavior
- Any unusual sounds (pump noise)
- Final device status
Final Thought
Effective troubleshooting starts with simple, external checks like flow, connections, and setup. Prioritize patient safety, follow a logical process, and escalate appropriately when internal failure is suspected. Strong documentation ensures clarity and continuity of care.
That is successful troubleshooting.