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Asset Type
Manufacturer
Model
What This Guide Helps With
Identifies causes of slow drainage, water retention, or plumbing blockages to ensure proper sterilization cycle completion and patient instrument safety.
Step-by-Step Troubleshooting
Ensure Staff Safety
Confirm the sterilizer chamber is not pressurized and no personnel are near the unit. Avoid burns or injury when opening doors or handling hot water.
Check Drain Pathway and Connections
Inspect the external drain hose for kinks, clogs, or improper connections. Ensure the hose is properly seated and water can flow freely.
Verify Facility Plumbing
Confirm that the floor drain or plumbing receiving the sterilizer discharge is clear, functional, and capable of handling the sterilizer’s outflow. A blocked floor drain can cause retention errors.
Inspect Water Level Sensors
Check that the reservoir or chamber water level sensors are clean, correctly positioned, and undamaged. Faulty sensors may falsely indicate retention issues.
Test Drain Pump Function
If the unit has a drain pump, activate a drain cycle. Listen for pump operation and observe water flow. No flow or unusual noise may indicate pump failure or obstruction.
Check for Residual Water in Chamber
Open the chamber after a cycle. If water remains, confirm whether it’s from incomplete drainage or condensation. Excessive residual water may indicate a clogged drain or faulty valve.
Examine Inlet and Outlet Valves
Ensure valves controlling water entry and exit are fully opening and closing. Sticking valves can cause water retention or improper cycle completion.
Cycle Test
Run a short drain or water purge cycle. Confirm proper water evacuation and that no alarms are triggered. Successful drainage indicates external and sensor components are functioning.
If the Problem Persists
External and easily verifiable causes have been ruled out. The device may have an internal plumbing blockage, pump failure, or valve malfunction.
- Remove the sterilizer from service
- Label it Out of Service
- Send for bench repair or manufacturer evaluation
Knowing when to stop is proper troubleshooting to prevent further damage or risk to patient safety.
Clinical Use Tip
Never attempt to troubleshoot drainage while the sterilizer is in an active cycle with instruments inside. Move patient-critical instruments to another sterilizer first.
Work Order Documentation (CCR Method)
CCR = Complaint, Cause, Resolution
Complaint
What was reported by the clinical staff.
Example:
"Sterilizer left residual water in chamber after cycle completion."
Cause
What was observed during troubleshooting.
Example:
"External drain hose was partially kinked, restricting water flow."
Resolution
What action was taken.
Example:
"Straightened hose, verified proper drainage, and ran test cycle successfully."
Helpful Details to Include (If Known)
- Floor drain tested and cleared
- Drain hose inspected and repositioned
- Drain pump audible and operational
- Water level sensors verified
- Chamber free of residual water post-test
Final Thought
Patient safety is the priority. Stepwise, logic-based troubleshooting helps isolate external issues first. Escalate only when necessary and document all findings to support maintenance records and reduce repeat failures.
That is successful troubleshooting.