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Manufacturer
Model
What This Guide Helps With
Troubleshooting chemical delivery, heating, drying, and disinfection performance issues before escalating washer-disinfector repair.
Step-by-Step Troubleshooting
Ensure patient and staff safety first.
Confirm the washer-disinfector is not needed for active instrument reprocessing before troubleshooting. If instruments are inside and the cycle failed, follow facility policy for handling potentially non-reprocessed instruments.
Expected outcome: The unit is safe to inspect without risking incomplete instrument processing.
If this resolves the issue: Stop and document the user/process issue.
Verify the reported failure.
Ask staff what failed: chemical dosing, low temperature, drying failure, thermal disinfection failure, cycle abort, alarm, wet load, residue, or failed printout/record. Review the cycle screen, cycle history, printout, or reprocessing record if available.
Expected outcome: The failure is clearly identified before parts or service are blamed.
If this resolves the issue: Stop and document the confirmed operating condition.
Check whether the correct cycle was selected.
Confirm the load type matches the selected cycle. Some cycles may use different chemical dosing, temperature targets, drying times, or disinfection phases.
Expected outcome: The selected program matches the instruments or goods being processed.
If this resolves the issue: Educate the user and document the incorrect cycle selection.
Inspect the chemical containers.
Verify detergent, neutralizer, rinse aid, lubricant, or other required chemicals are present, not empty, not expired, and connected to the correct pickup line.
Expected outcome: Each chemical container has sufficient fluid and is connected correctly.
If this resolves the issue: Replace or reconnect the chemical container, run a verification cycle if required, and stop.
Check chemical pickup tubing and strainers.
Look for kinked tubing, cracked tubing, loose fittings, blocked strainers, air in the line, or pickup tubes sitting above the chemical level.
Expected outcome: Chemical can be drawn from the container without restriction or air leaks.
If this resolves the issue: Correct the tubing issue and document the finding.
Confirm chemical dosing pumps are operating externally.
During an appropriate test or cycle phase, listen or observe for dosing pump activity if visible or audible without removing covers. Do not bypass safety covers or access internal components during operation.
Expected outcome: The dosing pump activates during the expected phase.
If this resolves the issue: Document normal operation or escalate if the pump does not activate.
Inspect chamber loading and spray path.
Confirm racks, trays, basins, and instruments are not blocking spray arms, air flow, chemical distribution, or drain paths.
Expected outcome: Water, chemistry, heat, and drying air can reach the load properly.
If this resolves the issue: Correct the loading issue and document user education.
Check water supply conditions.
Verify hot/cold water supply valves are open, water pressure appears normal, and there are no obvious facility water issues affecting multiple washers.
Expected outcome: The washer has adequate water supply for filling, heating, chemical dilution, and rinsing.
If this resolves the issue: Restore water supply or notify Facilities if the issue is building-related.
Inspect drain function.
Confirm the chamber is draining completely and no standing water remains after the drain phase. Poor draining can affect chemical concentration, rinse quality, heating, and drying.
Expected outcome: Water drains fully at the proper time.
If this resolves the issue: Clear external drain restrictions if allowed by facility policy, or escalate if the drain system requires repair.
Check for visible residue, foam, or chemical carryover.
Excess foam, residue, or unusual odor can indicate wrong chemical, over-dosing, poor rinsing, or incorrect loading.
Expected outcome: Chamber and load appear free of excessive foam or chemical residue.
If this resolves the issue: Correct chemical, loading, or cycle selection issue and document.
Verify temperature-related complaints with available records.
Review the cycle printout, display, or washer record for wash temperature, thermal disinfection temperature, hold time, and drying phase completion.
Expected outcome: Temperature and hold-time data either meet or fail the programmed cycle requirements.
If this resolves the issue: Document whether the complaint was confirmed or not confirmed.
Check for facility steam, hot water, or electrical supply issues.
If the WD 200 Series unit depends on facility steam, hot water, or specific electrical heating support, verify there are no known utility problems. Compare with other nearby reprocessing equipment if available.
Expected outcome: Utilities required for heating and drying are available.
If this resolves the issue: Refer the issue to Facilities and document the utility-related cause.
Inspect door gasket and chamber sealing externally.
Look for visible door seal damage, leaks, or steam escaping during operation. A poor seal can reduce chamber temperature and drying performance.
Expected outcome: Door closes securely with no obvious leak or damaged gasket.
If this resolves the issue: Replace/repair the gasket per facility process or escalate for service.
Check drying complaints separately from wash/disinfection complaints.
Confirm whether the load is truly not drying, overloaded, incorrectly positioned, or blocked from airflow. Also check that the selected cycle includes a drying phase.
Expected outcome: Drying failure is separated from loading or cycle-selection problems.
If this resolves the issue: Correct the loading/cycle issue and document.
Run an approved test or empty verification cycle if allowed.
After correcting external issues, run the appropriate facility-approved verification cycle. Do not return the washer to service until cycle completion and required parameters are verified.
Expected outcome: Chemical dosing, temperature, thermal disinfection, and drying complete normally.
If this resolves the issue: Return the unit to service and document the successful verification.
If the Problem Persists
If chemical containers, pickup tubing, cycle selection, loading, utilities, water supply, drain function, door sealing, and cycle records have been checked and the failure continues, the likely cause is internal.
Possible internal causes may include a failed dosing pump, temperature sensor issue, heater/steam control problem, drying blower issue, control valve issue, calibration problem, software/control fault, or internal plumbing restriction.
At that point:
- Remove the washer-disinfector from service.
- Label it Out of Service.
- Notify Sterile Processing leadership according to facility process.
- Send the unit for repair, vendor service, or bench evaluation.
Do not keep running patient-care instruments through a washer that cannot verify proper chemical dosing, temperature, drying, or thermal disinfection.
Knowing when to stop is proper troubleshooting. Washer-disinfector failures can directly affect instrument reprocessing quality, so unresolved process failures should not be treated as minor nuisance issues.
Clinical Use Tip
Do not troubleshoot a washer-disinfector while instruments are actively being processed for patient use. If a cycle fails, the load should be treated as not fully processed until facility policy confirms otherwise. Patient safety depends on verified cleaning and disinfection, not assumptions.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Sterile Processing reported the Belimed WD 200 Series washer-disinfector failed thermal disinfection and the load remained wet after cycle completion."
Cause
What was observed during troubleshooting.
Example:
"Found detergent container nearly empty with air visible in the chemical pickup line, and the selected cycle record showed incomplete dosing during the wash phase."
Resolution
What action was taken.
Example:
"Replaced chemical container, reseated pickup tubing below fluid level, ran an approved verification cycle, and confirmed chemical dosing and thermal disinfection completed normally."
Helpful Details to Include (If Known)
- Specific cycle name selected
- Whether the failure was chemical dosing, temperature, drying, or disinfection-related
- Alarm message or fault code shown
- Cycle printout or record reviewed
- Chemical containers checked
- Chemical expiration date verified
- Pickup tubing condition
- Water supply status
- Drain status
- Door gasket condition
- Load condition: wet, residue, foam, odor, visible soil
- Temperature or disinfection hold-time result if available
- Whether Facilities was contacted
- Final device status: returned to service or removed from service
Final Thought
For washer-disinfectors, troubleshooting should always protect the reprocessing workflow first. Start with the simple external causes: chemicals, tubing, loading, water, drain, utilities, cycle selection, and records. If the unit still cannot verify chemical delivery, temperature, drying, or disinfection performance, remove it from service and escalate. Clear CCR documentation helps Sterile Processing, Clinical Engineering, Facilities, and the vendor understand exactly what was checked and why the unit was or was not returned to service.
That is successful troubleshooting.