Check the Refrigerator Temperature with a Reading, Not a Dial Number

A refrigerator dial may show a setting rather than a measured temperature. An appliance thermometer lets you check what the compartment is actually doing. FDA guidance calls for a refrigerator temperature of 40°F or below and a freezer temperature of 0°F or below.

Set up a repeatable check

Use a thermometer intended for the appliance and follow its placement and reading instructions. Keep the refrigerator and freezer readings distinct. Record the date, temperature, and current control setting so an adjustment has a clear starting point.

If the reading is above the recommended temperature, consult the appliance instructions for adjustment and allow the specified stabilization time before checking again. Avoid assuming that a higher dial number always means a higher temperature; control systems differ.

Look at the conditions around the reading

Check whether the door is closing properly and whether contents prevent cold air from circulating. FDA advises against overpacking. If readings remain unsuitable despite appropriate adjustment, arrange support for the appliance rather than repeatedly turning the control without checking the result.

Do not use a single improved reading as proof that all previously stored food is safe. The time and temperature history still matter. This is especially relevant after a power failure or a door left open.

Keep a separate food-safety decision

Use current official food-safety guidance for the particular food and circumstances when deciding what to keep or discard. Smell and appearance cannot establish the safety of every food. Do not taste food to test whether an uncertain storage event made it unsafe.

A useful routine is to check the thermometer regularly and after an event that could affect cooling. Keep the task small: read, record, investigate an unsuitable result, and confirm the follow-up. The thermometer supports monitoring; it cannot reconstruct a storage history you did not observe.