Refrigerator temperature log for a restaurant: reach-ins, prep tables and under-counter units

A refrigerator temperature log records the temperature of each reach-in, prep table and under-counter fridge in your kitchen at set times, with who read it and what was done if it was too warm. Cold food must be held at 41°F (5°C) or below under the FDA Food Code, so each row needs the date, time, unit, reading, initials and a corrective action when the number is above the limit. Most kitchens read twice a day, at opening and at close, and add a check of the food itself when a unit reads high.

This page is about the small units on the line and at the bar. For the big room, see the walk-in cooler temperature log. Blank sheets are on the free logs page.

The number: 41°F for the food

The Food Code requires time/temperature control for safety (TCS) food to be kept at 41°F or below in cold holding [1]. That is the temperature of the food, not of the dial and not of the air. Air temperature is easy to read, so it is what a log usually records, and it is a good early warning. But it is only a stand-in. When a log shows 43°F air, the question is what the food read.

Set the unit's dial to give an air temperature a few degrees under the limit, commonly 34°F to 38°F, so a door opened during a rush does not push the food over. A unit running at 40°F air has no room to spare.

Which units go in the log

• Reach-in refrigerators on the line, in the pantry or at the pass. Door opens, and the heat of the line is next to them.
• Prep tables with a cold rail (sandwich or pizza tables). The pans sit in a well with the lid open much of the time; the food in the top rail is the part that warms up.
• Under-counter and bar fridges. Small, tightly packed and rarely cleaned behind. Milk, cut fruit, garnishes and dairy live here.
• Display cases and grab-and-go fridges in a cafe or deli.
• Chef bases and refrigerated drawers under a grill, where heat from above pushes the compartment up.

Give each unit a name you can write on a sheet: "Line reach-in 1", "Sandwich table", "Bar fridge L". Number them on the units themselves with a label so a new cook reads the right one.

Where the thermometer goes

1. Every unit needs its own thermometer, placed where it shows the warmest part of the compartment. The Food Code asks for a thermometer in the air of a refrigerated unit that is accurate to within ±3°F [1].
2. Put it near the door, on the middle shelf or hanging from the rack, not against the back wall by the cooling coil and not at the bottom where it is coldest.
3. In a glass of liquid, a bottle of water with a probe in it (or a simulated-product thermometer) reads steadier than air, which swings every time the door opens. Many kitchens use this for the log.
4. On a prep table, also probe the food in the top pans. The compartment may read fine while the pan at the edge of the rail does not.
5. Check the thermometer against an ice-water bath now and then. A wrong reading is worse than none. The thermometer calibration log shows the steps.

When to read

• At opening, before service. This is the reading that finds an overnight failure.
• Mid-shift, if the unit is busy or sits next to heat. Many kitchens skip this one and regret it when the lunch rush breaks a door seal.
• At close. It catches a unit that was left open or overloaded.
• After a delivery, a power cut, a defrost, a repair or any time the unit was open for a long time.

Twice a day is the usual minimum for a log. Read at about the same times, and take the reading before opening the door when you can, then record it. If the number is surprising, take it again after two minutes.

What the log needs

1. Date and time of each reading.
2. Unit name as labeled on the equipment.
3. Reading in °F and what it measures: air, bottle or food. Pick one and keep it.
4. Limit, printed at the top: 41°F for food, plus your own action line (for example 40°F).
5. Initials.
6. Action when the reading is over the action line, with the follow-up reading.

A filled-in sheet

Two rows are worth copying. The bar fridge row names what was probed, what was thrown out and when the unit was cleared to be restocked. The chef base row shows judgment: the air was over but the food was under, so the cook kept it, moved the risky items and fixed the cause.

What to do when a reading is high

The 4-hour guide follows the Food Code's rule that TCS food without temperature control for a limited time can be used if you know when it came out and can cool it back in time; check your jurisdiction, since some use shorter times, and use the product's own start time, not the time you noticed [1].

Why small units drift up

• Door seals. A torn gasket lets warm air in all day. Try a dollar bill: if it slides out easily when the door is closed on it, the seal is weak.
• Overloading. Packed shelves block the fan. Leave air space and keep boxes off the floor of the compartment.
• Open lids on prep tables. Close the lid between orders. Do not heap pans above the rim of the rail.
• Dirty condenser coils. Dust and grease on the coils make the compressor work harder and cool less. Clean them monthly at least.
• Hot food put in. A hot pot adds heat for hours. Cool food first (see the cooling log guide).
• Heat nearby. A reach-in beside a fryer works against its surroundings. Move it or add a barrier if you can.
• Defrost and ice. Ice on the evaporator blocks cold air. If a unit ices up, call for service.

Common mistakes

• Reading the display and never checking it with a separate thermometer
• One reading a day, at a time the unit is usually fine
• Writing "OK" or "good" instead of a number
• Copying yesterday's number down
• No action written when a reading is high
• Using the log for the medicine or vaccine fridge too: those have their own, tighter rules and ranges from health agencies, so keep them on their own sheets

Where this fits in the plan

Cold holding is a critical control point in most restaurant HACCP plans: the limit is 41°F, the monitoring is this log, and the corrective action is the table above. The cold holding temperature guide covers which foods and rules apply, and the temperature log sheet guide shows how the readings join the other daily logs. To have the sheets set up for your units, start with the free logs page.

Questions

What temperature should a restaurant refrigerator be?

The food must be 41°F or below. Set the unit so its air reads 34°F to 38°F to keep a margin.

How often should I log refrigerator temperatures?

At least twice a day, at opening and at close. Add a mid-shift read for busy units.

Do I measure the air or the food?

Either, but be consistent. The legal limit applies to the food, so probe food whenever the air reading is high.

Where should the thermometer go in a reach-in?

Near the door on the middle shelf, in the warmest spot, or in a container of liquid to steady the reading.

What if the fridge was off overnight?

Probe each TCS item. Food at or under 41°F can stay. Food above it needs a time check: if you cannot show it was warm for under 4 hours, discard it.

Can I use a digital data logger instead of a paper log?

Yes, if it records readings you can show to an inspector and you still act on alarms. Keep the printouts for the retention period.

Sources

1. FDA Food Code 2022 (3-501.16 cold holding, 4-204.112 temperature measuring devices, 3-501.19 time as a public health control), U.S. Food and Drug Administration
2. Keep food safe: the danger zone, USDA Food Safety and Inspection Service

Related: all food safety guides.