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Model
What This Guide Helps With
Troubleshooting absent, weak, or abnormal airflow caused by hose, blanket, filter, power, obstruction, or fan-related faults.
Step-by-Step Troubleshooting
1. Ensure Patient Safety First
If the WarmTouch WT 6000 is being used for patient warming and airflow stops, becomes weak, or an alarm appears, discontinue use and provide alternate warming support according to clinical procedure.
Do not troubleshoot the unit while it is actively supporting a patient.
Expected outcome: The patient is supported by a known-working warming system before evaluation begins.
Why it matters: A sudden performance change requires discontinuation of use until the warming system can be evaluated by qualified personnel.
2. Confirm the Reported Airflow Problem
With the unit removed from clinical use, connect the hose nozzle to an appropriate WarmTouch blanket before operating the blower. Do not operate the unit by directing the hose alone toward a patient or test surface.
Power the unit on and select a treatment setting that should activate airflow. Observe whether:
- The fan starts.
- Air exits through the connected blanket.
- Airflow is weak, intermittent, or absent.
- The display shows an alarm, warning, or filter message.
- The unit produces unusual noise, vibration, heat, or odor.
Expected outcome: The problem is confirmed under safe conditions and documented accurately.
If normal airflow is restored and no alarm or abnormal behavior is present, complete operational verification according to department procedure and return the unit to service only when safe. Stop troubleshooting.
Why it matters: In Standby and Ready modes, the fan is normally off; fan operation is expected in Treatment mode. The manufacturer also warns against free-hosing.
3. Verify Power and Operating Mode
Confirm that the unit is connected to a known-good hospital-grade grounded outlet and that the power cord is fully seated and undamaged.
Observe the status indication and display behavior:
- In Standby mode, the display and fan may be off.
- In Ready mode, the display is on, but the fan remains off.
- In Treatment mode, the fan should operate.
Select the intended treatment mode and reassess airflow.
Expected outcome: The unit enters Treatment mode and produces airflow through the blanket.
If the fan begins operating normally after correcting the power source or mode selection, document the correction and stop troubleshooting.
4. Inspect the Hose and Nozzle Externally
Power the unit off and inspect the entire accessible hose and nozzle for:
- Kinks, crushing, collapse, or severe twisting.
- Tears, holes, separation, or obvious damage.
- A loose or damaged nozzle.
- Debris or blockage visible at the nozzle opening.
Reposition the hose so air can travel freely, reconnect it securely to the blanket, and retest in Treatment mode.
Expected outcome: The hose is unobstructed and airflow is restored or the symptom remains unchanged.
If correcting a kinked or obstructed hose resolves the problem, document the cause and stop troubleshooting.
5. Check the Connected Warming Blanket
Confirm that a compatible WarmTouch blanket is installed correctly and has not been compressed, folded excessively, blocked by equipment, or damaged in a way that could restrict airflow.
For troubleshooting off the patient, replace the suspected blanket with a new compatible WarmTouch blanket and repeat the airflow check.
Expected outcome: Airflow is normal through a known-good blanket.
If airflow returns with a replacement blanket, remove the defective or obstructed blanket from use, document the finding, and stop troubleshooting.
6. Inspect Accessible Air Intake and External Obstructions
With the unit powered off, inspect the exterior air-intake and filter enclosure area for visible lint, packaging material, drape material, dust accumulation, or other external obstruction.
Verify that the unit is not positioned where linens, walls, cart accessories, or other equipment are blocking air entry or discharge.
Do not operate the warming unit with the filter enclosure removed.
Expected outcome: The unit has unobstructed exterior airflow paths and produces normal airflow when retested.
If removing an external obstruction restores airflow, document the correction and stop troubleshooting.
7. Check for a Filter Warning or Overdue Filter Maintenance
Power the unit into Ready mode and check the display for a filter expiration or replacement warning.
The WarmTouch WT 6000 monitors filter usage, and the manufacturer specifies HEPA filter replacement every 2,000 operating hours or 365 days, whichever occurs first.
If the filter is expired or due for replacement, follow the approved Clinical Engineering maintenance procedure for filter replacement and required post-maintenance verification.
Expected outcome: The filter condition is verified, overdue maintenance is corrected when applicable, and airflow is reassessed.
If completing approved filter maintenance restores normal airflow and the unit passes required verification, document the work and stop troubleshooting.
8. Record Any Fan-Related Error Code
If the display indicates an alarm or fault, record the exact displayed code and behavior before removing power.
Fan-related fault descriptions identified in service documentation include:
- Error 013: Fan motor drew too much current.
- Error 014: Fan speed below 3000 rpm.
- Error 015: Fan speed above 5000 rpm.
- Error 016: Fan speed too low for current fan voltage.
Errors 013, 014, and 016 may be associated with fan blockage or fan failure; Error 015 may indicate a power-control issue. These findings require further bench evaluation rather than continued clinical use.
Expected outcome: The fault is identified well enough to support appropriate repair escalation.
9. Evaluate for Abnormal Fan Behavior
During a controlled off-patient test, listen for abnormal fan behavior such as:
- Fan not starting in Treatment mode.
- Intermittent airflow.
- Grinding, scraping, rattling, or excessive vibration.
- Repeated alarms during blower operation.
- Burning smell or unusual heat.
Immediately discontinue testing if there is unusual heat, odor, smoke, electrical concern, or repeated fault behavior.
Expected outcome: The device either operates normally without abnormal signs or is clearly identified as requiring repair evaluation.
If the unit continues to demonstrate weak, absent, intermittent, or abnormal airflow, stop troubleshooting and escalate.
If the Problem Persists
If the power source, treatment mode, hose, nozzle, compatible blanket, accessible airflow path, and filter status have been checked without resolving the issue, common external causes have been ruled out.
The problem is likely related to an internal fan assembly, internal obstruction, fan sensing, power-control circuitry, or another internal component requiring bench evaluation.
The device should be:
- Removed from service.
- Labeled Out of Service.
- Sent for repair or bench evaluation by qualified personnel.
- Evaluated according to approved service procedures before returning to clinical use.
Knowing when to stop is proper troubleshooting. Do not continue using a warming system with unresolved fan or airflow failure.
Clinical Use Tip
Never troubleshoot a suspected airflow failure while the unit is actively warming a patient. Move the patient to a known-working warming system first, and never direct heated airflow from the hose without the approved blanket connected.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Clinical staff reported the Medtronic WarmTouch WT 6000 powered on but produced little to no airflow through the warming blanket."
Cause
What was observed during troubleshooting.
Example:
"Verified the unit entered Treatment mode, but airflow remained absent with a known-good hose position and replacement WarmTouch blanket; fan fault code 014 was displayed."
Resolution
What action was taken.
Example:
"Removed the warming unit from service, labeled it Out of Service, documented the displayed fan-speed fault, and routed the unit for bench evaluation and repair."
Helpful Details to Include (If Known)
- Outlet tested and result.
- Status indicator and display behavior.
- Treatment mode selected during testing.
- Hose and nozzle condition.
- Blanket replaced or inspected.
- Air-intake/filter area inspected.
- Filter warning or maintenance status.
- Exact alarm or error code displayed.
- Unusual fan noise, vibration, heat, or odor.
- Final device status.
Final Thought
Fan or airflow failure in a patient warming system can quickly affect reliable thermal support. Start with patient safety, rule out simple external airflow restrictions, document the exact behavior and alarms, and escalate appropriately when the problem points to internal repair.
That is successful troubleshooting.