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Freezer temperature log for commercial kitchens.
Record your frozen storage at -18°C or colder, twice a day, with a column for the reading, who checked it, and what they did if it warmed up. Print it, post it on the unit, and keep the cold chain on paper.
How to use the log
Frozen food is held at -18°C or colder. At that temperature bacteria stop growing, so the job of the log is to prove the unit stayed cold and to catch it early the day it starts to warm up. A freezer that drifts up is often the first sign of a failing seal, an iced-up coil, or a door left ajar.
What to record
- Date and time of the check
- Which unit, by name or number
- The temperature reading in °C
- Staff initials
- Corrective action, if it was needed
How often
- Twice a day, start and end of shift, is common practice
- Some health units want a check every four hours, confirm yours
- Record it even when the reading is normal
- Same staff where possible, for consistency
If it reads above -18°C
- Check the door is shut and the seal is intact
- Look for heavy ice build-up blocking airflow
- If it stays warm, move food to a working unit and call for service
- Do not refreeze food that has fully thawed, write what you did in the log
Download the freezer temperature log
Free, one page, letter size. Columns for date, time, unit, temperature, initials, and corrective action, with a manager sign-off line.
Every kitchen is different. This log is a general starting point, not a one-size-fits-all rule. Check frequency, target temperatures, and corrective steps change with your equipment and your local health unit's requirements. Review it and adapt it so it matches your facility before you rely on it. Probe It Food Safety provides this resource for general guidance only.
Certified Public Health Inspector
Freezers fail slower than fridges, which is the trap. A fridge that quits is obvious by lunch. A freezer can creep from -18 to -10 over a few days while everything still looks frozen on top. The twice-daily reading is what catches that creep before the product at the bottom of the unit is compromised. When I see a freezer log with steady readings and the odd defrost note, I know someone is actually looking at the dial, not just signing the sheet.
Samira Ali · Certified Public Health Inspector · Probe It Food SafetyCommon questions
What temperature should a commercial freezer be in Canada?
Frozen storage should be held at -18°C or colder. At that temperature bacterial growth stops. Many operators set the unit a little colder to hold -18°C through door openings, deliveries, and defrost cycles.
How often should I check freezer temperatures?
Twice a day, at the start and end of service, is common practice. Some local health units ask for a check every four hours during operating hours. Confirm what your inspector expects, and record the reading every time, including when it is normal.
Can I refreeze food if the freezer warmed up?
Food that has fully thawed should not be refrozen. If the unit warmed but the food stayed frozen solid, it can usually stay. If you are unsure whether it thawed, treat it as thawed. Note what happened in the corrective action column so there is a record of the decision.
How long should I keep temperature logs?
Many operators keep completed temperature logs for one to three years. Retention practice varies by province, by your own food safety plan, and by what your insurer expects, so confirm the period that applies to you. Keep them filed and easy to pull during an inspection.