Autoclave Maintenance Checklist: Daily, Weekly and Monthly Checks

An autoclave only protects patients when it is cleaned, tested and logged on a predictable schedule. This autoclave maintenance checklist lays out the daily, 7-day and monthly checks that keep a dental sterilizer dependable between manufacturer service visits. Assign each task to a named staff member, record every cycle, and post the page near the sterilizer.

Quick facts: In Ontario, the RCDSO requires a biological indicator for each sterilizer on every day that it is used — daily monitoring, not weekly. The weekly baseline is the CDC / AAMI ST79 standard in most US states. Bowie-Dick tests are a standard daily check on pre-vacuum sterilizers. A failed test stops the next cycle until the cause is found.

Why maintenance is part of sterilization

Steam sterilization depends on the machine as much as on the instruments. A worn door gasket, a clogged chamber drain or a vacuum pump losing pressure quietly weakens every load that passes through. That is why manufacturer manuals, CSA standards and dental regulators expect scheduled care rather than repairs after a failure.

Daily checks (before the first load)

The morning routine takes about ten minutes, before anything enters the chamber:

• Wipe the door gasket and inspect it for cracks, chips or debris.
• Clear the chamber drain strainer if anything has collected there.
• Confirm temperature and pressure readings once the unit is warm.
• Run a Bowie-Dick test on a pre-vacuum sterilizer before the first load.
• Log the load: contents, cycle type, operator and finish time.

Bowie-Dick packs test the vacuum phase, so a pass means the chamber can remove air before steam enters. Running one daily on a pre-vacuum unit follows manufacturer and CSA guidance, because air leaks rarely show up any other way. CliniEco carries Bowie-Dick test packs (ISO 11140-5 Type 2) sized for that first-cycle check.

Daily checks and the biological indicator

In Ontario, the RCDSO requires a biological indicator for each sterilizer on every day that it is used — daily monitoring, not weekly. The weekly baseline is the CDC / AAMI ST79 standard in most US states. A biological indicator is the only test that proves spores were killed, so it catches failures chemical indicators miss. Rapid-readout vials give the answer within 24 hours, so each day's test can be confirmed before the next day's cycles. Confirm what your province and regulator expect, then put it on the calendar.

A biological indicator is the only test that proves spores were killed, so it catches failures chemical indicators miss. Rapid-readout vials give the answer within 24 hours. CliniEco offers a 24-hour rapid readout biological indicator in 25-packs that suit steady daily use.

During the same visit, wipe down the chamber interior, check water quality and the reservoir, and inspect filters and screens. If instruments are pre-cleaned in an ultrasonic unit, check that the solution is fresh.

Monthly checks and technician service

Once a month, block out time for the deeper work:

• Deep clean the chamber and the door sealing surfaces.
• Inspect door hinges, gaskets and locking hardware.
• Review the sterilization log for failed cycles or developing patterns.
• Check stock of pouches, tape and chemical indicators, including Class 5 steam chemical integrators for internal pack monitoring.
• Book the manufacturer-recommended service visit when it comes due.

Logging: the record that saves you

A written log turns the routine into evidence. For every load, record the date, contents, cycle parameters and the operator, and keep biological indicator and Bowie-Dick results with the same pages. That record answers regulator questions and patient concerns alike. Logs also reveal patterns early: three slow warm-ups in a row means a service call.

Checklist table: task, frequency, who

Signs it is time to call a technician

Some faults need hands-on help. Book service when you see any of these:

• Repeated Bowie-Dick failures on a correctly run test.
• A positive biological indicator or a failed chemical indicator.
• Error codes, longer cycles, unusual noise, or steam escaping the door.
• A gasket that no longer seals properly.

After any failed test, pull and quarantine the load, then call your service provider before running another cycle. Treat the first warning as a stop signal.

FAQ

How often should an autoclave be cleaned?

Light daily care covers the gasket and drain strainer, the chamber interior is wiped every 7 days, and a full deep clean happens monthly. Your unit's manual sets the exact schedule.

When is the biological indicator test done?

In Ontario, the RCDSO requires a biological indicator for each sterilizer on every day that it is used — daily monitoring, not weekly. The weekly baseline is the CDC / AAMI ST79 standard in most US states.; confirm what applies where you practise.

What does a Bowie-Dick test catch?

It detects air leaks and incomplete vacuum removal in pre-vacuum sterilizers, conditions that keep steam from reaching instruments. Daily use follows manufacturer and CSA guidance for these units.

Who can service an autoclave in Canada?

A qualified technician trained on your specific model, following the manufacturer's service schedule. Keep every service report with your sterilization logs.

What logs do dental regulators expect?

Cycle parameters and contents for every load, biological indicator results, Bowie-Dick results for pre-vacuum units, plus maintenance and service records.

Related reading: explore our dental compliance hub for sterilization and infection control.

Related: Sterilization supply plan — BI, integrators, pouches and tape from $69/month.

check RCDSO sterilization monitoring requirements in our compliance pillar guide.

Related reading

• Pre-Autoclave Inspection Checklist: Catch Problems Early
• RCDSO vs CDSBC Infection Control: Dental Office Differences