On this page
Asset Type
Manufacturer
Model
What This Guide Helps With
Use this guide for abnormal drain temperature, slow drainage, standing chamber water, or cycle problems associated with the sterilizer drain path.
Step-by-Step Troubleshooting
1. Protect Patient Safety and Avoid Hot-Water or Steam Exposure
Do not reach into a hot chamber or drain area until the sterilizer is in a safe condition. Treat hot condensate, steam, and drain piping as burn hazards.
Quarantine any load affected by a drain-related cycle failure.
Expected outcome: Personnel are protected and no questionable processed load is released.
2. Confirm the Exact Drain Complaint
Determine whether staff observed:
- Standing water in the chamber.
- Slow drainage.
- A drain-related alarm or message.
- Abnormally hot drain discharge.
- Cycle aborts associated with drainage.
- Water leaking externally.
- Problems limited to certain cycles.
Record exact messages before clearing them.
Expected outcome: The complaint is distinguished as blockage, drainage performance, temperature concern, leakage, or cycle-control behavior.
3. Allow the Chamber to Reach a Safe Condition
Before inspecting the chamber drain, ensure the sterilizer is idle and the chamber is safe to access according to facility practice.
Do not remove components from a pressurized or hot sterilizer.
Expected outcome: The chamber can be inspected without exposure to pressure, steam, or unsafe heat.
4. Inspect the Accessible Chamber Drain Area
Visually inspect the chamber drain or strainer area for lint, labels, wrappers, tape, packaging fragments, or other accessible debris.
Remove only debris that can be safely cleared without disassembling internal drain components.
Expected outcome: The accessible drain path is clear. If removal of debris restores normal drainage, proceed to functional verification.
5. Check for Standing Water
Observe whether water remains in the chamber after the unit should normally have drained.
Document the amount and location qualitatively without inventing acceptable limits.
Expected outcome: No abnormal standing water remains. Persistent accumulation suggests a deeper drain, valve, trap, or infrastructure issue.
6. Inspect External Drain Conditions
Check accessible drain piping and the facility drain connection for obvious:
- Kinks or damage.
- Disconnection.
- Backup.
- Leakage.
- Recent plumbing work.
- Water accumulation around the sterilizer.
Coordinate with Facilities if a building drain restriction is suspected.
Expected outcome: The facility drain path appears open and intact. If an external plumbing restriction is found, correct or escalate the infrastructure problem before testing the sterilizer.
7. Check Relevant Facility Water Conditions
Where applicable, verify that required water service associated with drain cooling or related sterilizer functions is available.
Do not adjust undocumented valves or service settings.
Expected outcome: Required external water service is present. An identified facility water interruption is corrected before further sterilizer testing.
8. Inspect for Abnormal Leakage or Heat
Look for unexpected hot-water discharge, steam leakage, excessive condensation, or other evidence of uncontrolled thermal conditions.
Do not attempt internal valve repair or place hands near suspected hot discharge points.
Expected outcome: No unsafe external leakage or abnormal heat condition is present. Unsafe discharge requires removal from service.
9. Perform an Approved Functional Test
After correcting any accessible blockage or infrastructure problem, run an approved test cycle and observe chamber drainage and cycle progression.
Verify that water does not accumulate abnormally and that the cycle completes without a recurring drain-related condition.
Expected outcome: Drainage is effective and repeatable and the sterilizer completes the appropriate test cycle. If successful, troubleshooting can stop.
10. Escalate Persistent Drain Failure
If the accessible drain, external plumbing, utility conditions, and chamber condition are satisfactory but the problem persists, stop external troubleshooting.
Possible service-level categories include internal drain valves, traps, temperature-control functions, cooling-water controls, sensors, plumbing, or control systems.
Expected outcome: The sterilizer remains out of service until drain operation is properly evaluated and verified.
If the Problem Persists
Common external drain and facility causes have been ruled out. Remove the sterilizer from service, label it Out of Service, and arrange qualified repair or service evaluation.
Evaluation should use current STERIS documentation and approved test equipment. Internal valves, traps, drain-temperature controls, sensors, piping, and associated configuration should be serviced only by qualified personnel.
After repair, verify drainage, cycle performance, and all applicable sterilization-performance requirements before return to service. Recognizing when a drain problem exceeds safe external troubleshooting is appropriate Clinical Engineering practice.
Clinical Use Tip
Standing chamber water after a failed cycle can affect both load condition and sterilization performance; keep the affected load quarantined until properly reprocessed.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Sterile Processing reported standing water in the AMSCO 600 Series chamber and a cycle abort associated with drainage."
Cause
What was observed during troubleshooting.
Example:
"Clinical Engineering found packaging debris obstructing the accessible chamber drain area."
Resolution
What action was taken.
Example:
"Removed the debris, verified the chamber drained normally during an approved test cycle, confirmed successful cycle completion, and returned the sterilizer to service."
Helpful Details to Include (If Known)
- Exact drain-related alarm or message.
- Standing water observed.
- Cycle and phase affected.
- Accessible drain findings.
- External drain condition.
- Facility plumbing or water issues.
- Visible leakage.
- Abnormal heat or steam.
- Test-cycle result.
- Final device status.
Final Thought
Treat steam and condensate as hazards, inspect only accessible drain causes first, distinguish sterilizer problems from facility plumbing issues, and escalate internal drainage faults for qualified service and verification.
That is successful troubleshooting.