Solving Common Sterilizer Failures
A Practical Troubleshooting Guide

Always use steam-distilled water. Tap water or even RO water contains minerals and chlorides that build up as scale inside the chamber, pipes, and sensors. This scale acts as an insulator, leading to heating failures and clogged valves over time. Using only distilled water can prevent over 90% of common maintenance issues and significantly extend the life of your equipment.

Most manufacturers recommend replacing the door gasket every 12 to 24 months, or after approximately 500 cycles. However, you should inspect it weekly for signs of wear, such as cracking, hardening, or shrinking. If you hear any hissing during a cycle or notice the door is not sealing tightly, the gasket should be replaced immediately, regardless of its age, to prevent cycle failures.

Rust spots are typically caused by mineral deposits from improper water or debris left on instruments, not the sterilizer itself. Ensure all instruments are thoroughly cleaned and rinsed before sterilization. Using tap water can also deposit minerals that cause spotting. If the problem persists, use a specialized chamber cleaning solution to remove any mineral buildup inside, at least once every 40-50 cycles.

You should never interrupt a cycle to add or remove instruments. Stopping a cycle before completion means the items inside are not sterile. Most modern units have safety locks that prevent the door from opening while the chamber is pressurized. Aborting a cycle should only be done in an emergency, and the entire load must be re-processed in a new, complete cycle.